; File MSXIBM.ASM ; Kermit system dependent module for IBM-PC include mssdef.h ; Copyright (C) 1985, 1993, Trustees of Columbia University in the ; City of New York. Permission is granted to any individual or institution ; to use this software as long as it is not sold for profit. This copyright ; notice must be retained. This software may not be included in commercial ; products without written permission of Columbia University. ; ; Edit History ; 27 August 1992 version 3.13 ; 6 Sept 1991 version 3.11 ; Last edit 3 June 1993 ; Add Beame and Whiteside TCP/IP support, adapted from James Sturdevant. ; Add LAT support for Interconnections Inc TES v3 over LAT transport. ; Nettype is lat, letter ident is 'I', teslat is none zero. ; August 1992 Split each comms path into separate structures ; Feb 1992 Add multiple internal TCP/IP Telnet sessions ; 2 Feb 1991 Add support for user specified IRQs 2..15. ; 29 August Add direct Interconnections Inc TES support. ; 12 August Add Novell TELAPI network interface. ; 11 March 1990 Add 75/1200 baud split speed from Dan Norstedt. ; 30 Sept 1989 Incorporate Opennet networking material from Fred Richter. ; 30 Sept 1989 Fred Richter (FGR) Intel Corp, Hauppauge NY ; polyof!inthap!fred or fred@polyof.poly.edu ; Added support for Intel Opennet Networking Virtual Terminal Services ; added "set port opennet xxx", also modified (slightly) ; the Netbios code (rpost) to always have the next Netbios receive posted ; as a small efficiency gain. Added error checking for received Netbios ; packets (there was none for async receives), also fix problem when the ; receives are canceled, where the data was being accepted anyway. ; 3 Sept 1989 Add DECnet CTERM and LAT support, plus Novell Int 6Bh. ; 9 July 1989 Add automatic usage of National Semiconductor 16550A UART in ; receiver fifo mode. Thanks to Dan Norstedt, danne@kicki.stacken.kth.se, ; and Campbell Scientific, Logan Utah for urging and supporting information. ; 17 June 1989 Add transparent interrupt driven support for IBM's Extended ; Bios via SET PORT BIOSn. ; 8 June 1989 Add Wyse-700 support from (Mikko Laanti (mjl). ; 6 March 1989 Add SET TERMINAL REPLAY FILESPEC command. ; 21 Jan 1989 Avoid initializing a port until the port is accessed for regular ; use, baud rate setting, or modem status. portin=-1 means unaccessed. ; 2 Dec 1988 Preserve UART parity etc bits in Line Control Reg. ; 30 Nov 1988 Add SET TERM CLEAR screen clear command (uses byte VTCLEAR). ; 26 Nov 1988 Add SET TERM TAB SET/CLEAR AT start-col:spacing notation. ; 21 Nov 1988 Version 2.32 ; 25 Oct 1988 Add Ungermann Bass network board status check in proc chkub, ; thanks to Fritz Buetikofer and Rene Rehmann in Switzerland. ; 9 Oct 1988 Add byte vtemu.vtchset to hold choices for VT102 emulator ; character sets (US, UK, or Alternate-ROM). Tnx to Baruch Cochavy. The value ; of vtemu.vtchset must match definitions in emulator file mszibm.asm. ; 5 Oct 1988 Add SET TERMINAL DIRECTION command and status display line. ; 21 August 1988 Move tests for NUL and DEL received chars to prtchr routine ; for uniform application of tests. ; 28 July 1988 Add more UB details from Henrik Levkowetz. Double check serial ; port address for 02f8h with COM1, for PCjr, and shift to COM2 addresses. ; 16 July 1988 Use null interrupt routine, nulint, when resetting serial port ; because setting OUT2 low generates stray ints on some UARTs. [jrd] ; 1 July 1988 Version 2.31 ; 12 June 1988 Add small changes to handle network session failures, and ; add carry set if serini fails to init port. ; 29 May 1988 Add Ungermann Bass NetOne NETCI support from Henrik Levkowetz ; [ohl]. Revise same to test for actual network presence and to avoid ; interference with NetBios operations. Use "SET PORT UB-Net1" ; 23 May 1988 Hangup now resets serial port so can be re-inited with DTR high ; 21 May 1988 Tweak serrst to allow stray interrupts while resetting UART, ; clear outstanding network requests when changing ports. ; 6 May 1988 Introduce xmtbufx for explict network double buffering of ; xmitted data. ; 28 April 1988 fix set port bios register problem. ; 18 April 1988 Network: do another READ when char count < low water mark. ; If BIOSn is selected skip test of Bios 40:0h for port presence. ; 3 April 1988 Ignore NUL and DEL at serial port unless DEBUG or TRANSLATE ; INPUT are active, but pass DEL if Tek mode is active. Replace netdone ; with new lclexit global word to shut net when Kermit exits. ; 22 March 1988 Add global byte Tekgraf which forces graphics board type ; 0=auto-sensing, 1=cga, 2=ega, 3=VGA, 5=Hercules, 5=ATT. Tekgraf stored ; and set in this file by Set Term Graphics . [jrd] ; 6 March 1988 Ignore received XOFF's if we have already sent one. [jrd] ; 27 Feb 1988 Add global routine getmodem to return modem status in al. [jrd] ; 9 Feb 1988 Automaticallly find Interrupt ReQuest level for a port. ; No Modem Status for network. [jrd] ; 25 Jan 1988 Revise outchr waiting on XON to use 4 millisec increments. [jrd] ; 1 Jan 1988 version 2.30 ; 24 Dec 1987 Revise selection of COM1 to use COM1 name but COM2 addresses ; if base address of 02f8 (COM2) is found in 40:00h and display notice. ; Restore state of IRQ interrupt line when finished with serial port. [jrd] ; 31 Oct 1987 Add terminal type Tek4010, with Tek submode Tekflg. [jrd] ; 24 Oct 1987 Enhance clrbuf to empty any intermediate (net) buffers. [jrd] ; 19 Oct 1987 Fix stray tab-set at column 32. [jrd] ; 2 Oct 1987 Add PCjr baud rate table, from Ted Medin. [jrd] ; 6 Sept 1987 Allow serial port serint to send xoff when buffer fills even ; though user may have sent xoff by hand. [jrd] ; 27 Aug 1987 Skip timeout test in OUTCHR if receive timeout is zero. [jrd] ; 23 August 1987 Add vtemu.vtflgop to hold runtime terminal settings so that ; a reset command restores them to the Setup values, vtemu.vtflgst. Show ; displays the vtemu.vtflgop operational values. [jrd] ; 17 August 1987 Make timing adjustments for Token Passing and single buffered ; network adapter boards. Byte netdbfr indicates presence of double buffering; ; it is set in chknet as a vendor option. To test your boards force dbl buf ; then look for missing 256 byte parts of long packets sent out; missing parts ; mean new material overwrote not-yet-sent old == single buffering. [jrd] ; 8 August 1987 Add interrupt chaining in serint. [jrd] ; 23 July 1987 Clear xofsnt and xofrcv xon/xoff flags in ihost(s/r). [jrd] ; 9 July 1987 Cure confusion about COM1/2 for IBM PCjr (address of regular ; COM2 in 40:0h slot for COM1) with info from John Neufeld. [jrd] ; 2 July 1987 Route NetBios cancels through separate scb for systems, such ; as Novell NetWare, which object to having active scbs touched. [jrd] ; 25 June 1987 Add trapping of Int 14H (Bios RS232 procedure) to allow ; CTTY command to function without too much inteference from DOS. [jrd] ; 17 June 1987 Enlarge tab setting to full 132 columns at all times. [jrd] ; 11 June 1987 Add Set Term Roll on/off to control auto roll back of screen ; when new characters are displayed; default is off (no unwinding). [jrd] ; 20 May 1987 Remove rejection of NULL and DEL chars, let callers do it. [jrd] ; 16 May 1987 Add distinction between user typed and receiver threshold ; controlled sending of XOFF. User level overrides buffer control.[jrd] ; Add COM3 and COM4 support: examine memory 40:00h->40:07h for selected ; port COM1..4, resp. If word is null then set flags.comflg to 0 to say ; undefined port. Otherwise, use that word in seg 40h as base of UART i/o ; ports. Assume IRQ4 for COM1 and COM3 (same except for port addresses) ; and IRQ4 for COM2 and COM4 (again, same except for port addresses). ; Serial port info sturcture (not values) assumed identical for all ports. ; 25 April 1987 Add Netbios compatible local area network support. [jrd] ; Set Port command expanded to syntax SET PORT NET nodename. Use nodename ; if acting as a client to named remote node, leave blank if running in ; Server mode. Byte 'ttyact' is controlled by msster.asm to indicate Connect ; mode is being used. Byte 'netdone' (stored in mssker.asm) holds offset of ; network hangup procedure 'netclose' to be done when leaving Kermit. Hangup ; command extended to to network hangup as well. Network uses IBM Netbios ; standard calls (Int 5Ch) and allows for extensions of AT&T STARLAN for ; longer node names via Int 2Bh (the later is tested before use). Virtual ; circuits are employed. The Redirector is not necessary. Kermit can operate ; as either a terminal (does a CALL at Connect mode startup), a file receiver ; (does a CALL at startup), or a Kermit server (does an anonomous LISTEN at ; startup, hence no nodename). Clients should Set Timer Off. ; Note - ; When the Bios is used for serial port i/o the modem signals DSR and CTS ; must be asserted low before the Bios will access the hardware. Jumpers ; from pin 20 (DTR) to pin 6 (DSR) and from pin 4 (RTS) to pin 5 (CTS) ; will probably be necessary. ; From Glenn Everhart (who suggested using the Bios alternative) ; public serini, serrst, clrbuf, outchr, coms public dodel, ctlu, cmblnk, locate, prtchr, baudst, clearl public getbaud, beep, shomodem, getmodem, mdmhand public count, xofsnt, puthlp, putmod, clrmod, poscur, holdscr public sendbr, sendbl, machnam, setktab, setkhlp, lclini, showkey public ihosts, ihostr, dtrlow, serhng, comptab, pcwait public portval, bdtab, ubhold, dupflg, setnbios, peekcom public sescur, seslist, sesdisp, tcpstart, savexoff, savexlen public parmsk, flowon, flowoff, flowcnt off equ 0 bufon equ 1 ; buffer level xon/xoff on-state control flag usron equ 2 ; user level xon/xoff on-state control flag mntrgh equ bufsiz*3/4 ; High point = 3/4 of buffer full mntrgl equ bufsiz/4 ; Low point = 1/4 buffer full nbuflen equ 512 ; bytes in each network buffer (two of them) ; DEC-LAT requires 259 (256 + 3 extra) BRKBIT EQU 040H ; Send-break bit. TIMERCMD EQU 43h ; 8253/4 Timer chip command port TIMER2DATA EQU 42h ; 8253/4 Timer 2 data port PPI_PORT EQU 61h ; 8255 prog peripheral chip control port VIDEO EQU 10H ; Bios Video display software interrupt RS232 EQU 14H ; Bios RS232 serial port s/ware interrupt ; constants used by serial port handler MDMINP EQU 1 ; Input ready bit MDMOVER EQU 2 ; Receiver overrun ; 1200/75 baud split speed constants cnt75b equ 47721/3 ; One bit of 75 baud at 1.193 Mhz clock precomp equ cnt75b/8 ; Precomp 12%, allows 3ms latency w 12% jitter _TEXT segment extrn ktcpopen:far, ktcpclose:far, ktcpswap:far, ktcpcom:far _TEXT ends data segment extrn flags:byte, trans:byte, ttyact:byte, comand:byte extrn lclsusp:word, lclrest:word, lclexit:word, rxtable:byte extrn rdbuf:byte, taklev:byte, tekflg:byte, scbattr:byte extrn low_rgt:word, diskio:byte, crt_cols:byte, tekflg:byte extrn dosnum:word, portirq:byte, dosctty:byte, decbuf:byte extrn tcpdata:word, tcphost:byte, tv_mode:byte, repflg:byte extrn takadr:word, taklev:byte, vtinited:byte, kbdflg:byte extrn yflags:byte, ftogmod:dword, apctrap:byte, protlist:byte extrn vtcpage:word ; Modem information mdminfo struc mddat dw 03f8h ; data register, base address (03f8h) mdiir dw 03fah ; interrupt identification register (03fah) mdstat dw 03fdh ; line status register (03fdh) mdcom dw 03bfh ; line control register (03fbh) mden db not (1 shl 4) ; mask to enable interrupt mddis db (1 shl 4) ; mask to disable interrupt mdmeoi db 60h+4 ; specific EOI mdintv dw 8+4 ; saved interrupt vector (0ch is IRQ 4) mdmintc dw 20h ; interrupt controller control (20h or 0a0h) mdminfo ends modem mdminfo <> setktab db 0 ; superceded by msuibm code, return 0 here setkhlp db '$' ; and add empty help string holdscr db 0 ; Hold-Screen, non-zero to stop reading savsci dd 0 ; old serial port interrupt vector sav232 dd 0 ; Original Bios Int 14H address, in Code seg savirq db 0 ; Original Interrupt mask for IRQ savier db 0 ; original UART Int enable bits (03f9) savstat db 0 ; orginal UART control reg (03fch) savlcr db 0 ; Original Line Control Reg (3fbh) contents dupflg db 0 ; full (0) or half (1) duplex on port quechar db 0 ; queued char for outchr (XOFF typically) intkind db 0 ; cause of serial port interrupt isps2 db 0 ; non-zero if real IBM PS/2 erms40 db cr,lf,'?Warning: Unrecognized Speed',cr,lf,'$' badbd db cr,lf,'Unimplemented speed$' badprt db cr,lf,'?Warning: unknown address for port. Assuming \x0$' biosmsg db cr,lf,'?Warning: unknown hardware for port.' db ' Using the Bios as BIOS$' badirq db cr,lf,'?Warning: unable to verify IRQ. Assuming $' msmsg1 db cr,lf,' Modem is not ready: DSR is off$' msmsg2 db cr,lf,' Modem is ready: DSR is on$' msmsg3 db cr,lf,' no Carrier Detect: CD is off$' msmsg4 db cr,lf,' Carrier Detect: CD is on$' msmsg5 db cr,lf,' no Clear To Send: CTS is off$' msmsg6 db cr,lf,' Clear To Send: CTS is on$' msmsg7 db cr,lf,' Modem is not used by the Network$' msmsg8 db cr,lf,' COM1 address: Port \x$' msmsg9 db ', IRQ $' msmsg10 db ', 16550A UART FIFO$' hngmsg db cr,lf,' The phone or network connection should have hung up' db cr,lf,'$' hnghlp db cr,lf,' The modem control lines DTR and RTS for the current' db ' port are forced low (off)' db cr,lf,' to hangup the phone. Normally, Kermit leaves them' db ' high (on) when it exits.',cr,lf db ' For networks, the active session is terminated.',cr,lf,'$' machnam db 'IBM-PC$' crlf db cr,lf,'$' delstr db BS,BS,' ',BS,BS,'$' ; Delete string clrlin db BS,BS,' ',cr,'$' ; Clear line (just the cr part) portin db -1 ; Has comm port been initialized, -1=not used xofsnt db 0 ; Say if we sent an XOFF xofrcv db 0 ; Say if we received an XOFF pcwcnt dw 800 ; number of loops for 1 millisec in pcwait fifo db 0 ; non-zero if 16550A UART (FIFO mode) temp dw 0 temp2 dw 0 tempsci dw 0 ; temp storage for serint tempdum dw 0 ; temp storage for serdum timeract db 0 ; timer in use by a routine, flag clomsg db ' A network session may be active; exit anyway [Yes/No]? ',0 clotab db 2 ; close net on exit table mkeyw 'yes',0 mkeyw 'no',1 comptab db 24 ; communications port options mkeyw 'Bios1','0'+1 ; '0' is to flag value as forced Bios mkeyw 'Bios2','0'+2 mkeyw 'Bios3','0'+3 mkeyw 'Bios4','0'+4 mkeyw 'COM1',1 ; these go straight to the hardware mkeyw 'COM2',2 mkeyw 'COM3',3 mkeyw 'COM4',4 mkeyw '1',1 ; straight to the hardware mkeyw '2',2 mkeyw '3',3 mkeyw '4',4 mkeyw '3Com(BAPI)','C' ; 3Com BAPI interface mkeyw 'BWTCP','b' ; [JRS] Beame & Whiteside TCP mkeyw 'DECnet','D' ; DECnet-DOS LAT and CTERM mkeyw 'EBIOS','E' ; IBM/YALE EBIOS Int 14h interceptor mkeyw 'NetBios','N' ; Netbios mkeyw 'Novell(NASI)','W' ; Novell NetWare NASI/NACS mkeyw 'OpenNET','O' ; Intel OpenNET support (FGR) mkeyw 'TCP/IP','t' ; Telnet, internal mkeyw 'TELAPI','T' ; Novell TELAPI mkeyw 'TES','I' ; TES, Interconnections Inc mkeyw 'UB-Net1','U' ; Ungermann Bass Net One mkeyw ' ',0 ; port is not present, for Status ; port structure: ; baud rate index, local echo, parity flag, if flow control active (both ways), ; if need handshake after pkts, default handshake char, flow control char pair ; half/full duplex, port ready, send, receive, close procedures ; UART hardware port1 prtinfo <-1,0,defpar,3,0,defhand,floxon,0,0,uartsnd,uartrcv,serrst> port2 prtinfo <-1,0,defpar,3,0,defhand,floxon,0,0,uartsnd,uartrcv,serrst> port3 prtinfo <-1,0,defpar,3,0,defhand,floxon,0,0,uartsnd,uartrcv,serrst> port4 prtinfo <-1,0,defpar,3,0,defhand,floxon,0,0,uartsnd,uartrcv,serrst> ; IBM PC Bios and EBIOS portb1 prtinfo <-1,0,defpar,3,0,defhand,floxon,0,0,biossnd,biosrcv> portb2 prtinfo <-1,0,defpar,3,0,defhand,floxon,0,0,biossnd,biosrcv> portb3 prtinfo <-1,0,defpar,3,0,defhand,floxon,0,0,biossnd,biosrcv> portb4 prtinfo <-1,0,defpar,3,0,defhand,floxon,0,0,biossnd,biosrcv> portval dw port1 ; Default is to use port 1 bdtab db 21 ; Baud rate table mkeyw '45.5',0 mkeyw '50',1 mkeyw '75',2 mkeyw '110',3 mkeyw '134.5',4 mkeyw '150',5 mkeyw '300',6 mkeyw '600',7 mkeyw '1200',8 mkeyw '1800',9 mkeyw '2000',10 mkeyw '2400',11 mkeyw '4800',12 mkeyw '9600',13 mkeyw '14400',14 mkeyw '19200',15 mkeyw '28800',16 mkeyw '38400',17 mkeyw '57600',18 mkeyw '115200',19 mkeyw '75/1200',20 ; split speed, use this index for Bsplit Bsplit equ 20 ; 75/1200 baud, split-speed [pslms] ; this table is indexed by the baud rate definitions given in bdtab. ; Unsupported baud rates should contain 0FFh. bddat label word dw 9E4H ; 45.5 baud dw 900H ; 50 baud dw 600H ; 75 baud dw 417H ; 110 baud dw 359H ; 134.5 baud dw 300H ; 150 baud dw 180H ; 300 baud dw 0C0H ; 600 baud dw 60H ; 1200 baud dw 40H ; 1800 baud dw 3AH ; 2000 baud dw 30H ; 2400 baud dw 18H ; 4800 baud dw 0CH ; 9600 baud dw 08h ; 14400 baud dw 06H ; 19200 baud dw 04h ; 28800 baud dw 03H ; 38400 baud dw 02h ; 57600 baud dw 01h ; 115200 baud dw 5fh ; Split 75/1200, 1200+1.1 percent error baudlen equ ($-bddat)/2 ; number of entries above ; this table is indexed by the baud rate definitions given in ; pcdefs. Unsupported baud rates should contain FF. ; Bits are for Bios speed, no parity, 8 data bits. clbddat label word dw 0FFH ; 45.5 baud -- Not supported dw 0FFH ; 50 baud dw 0FFH ; 75 baud dw 03H ; 110 baud dw 0FFH ; 134.5 baud dw 23H ; 150 baud dw 43H ; 300 baud dw 63H ; 600 baud dw 83H ; 1200 baud dw 0ffH ; 1800 baud dw 0FFH ; 2000 baud dw 0a3H ; 2400 baud dw 0c3H ; 4800 baud dw 0e3H ; 9600 baud dw 0FFH ; 14400 baud dw 0FFH ; 19200 baud dw 0FFH ; 28800 baud dw 0FFH ; 38400 baud dw 0FFH ; 57600 baud dw 0FFH ; 115200 baud dw 0FFh ; Split 75/1200 defcom dw 03f8h,02f8h,03e8h,02e8h ; default COMn port addresses ;;;;;;;;;;;;;; start of per session save area even savexoff label word source db bufsiz+2 DUP(?) ; Buffer for data from port (+ 2 guard bytes) srcpnt dw source ; Pointer in buffer count dw 0 ; Number of chars in int buffer lastread db 0 ; last read char, for NVT parmsk db 0ffh ; parity mask, 0ffh for no parity, 07fh with flowoff db 0 ; flow-off char, Xoff or null (if no flow) flowon db 0 ; flow-on char, Xon or null flowcnt db 0 ; holds flowc (!= 0 using any flow control) xmtcnt dw 0 ; occupancy in current output buffer xmtbufx db nbuflen+3 dup (0) ; external version of xmtbuf (dbl buffers) ; TCP/IP Telnet internal port_tn prtinfo <-1,0,defpar,3,0,defhand,floxon,0,0,ubsend,ubrecv,tcpclose> savexlen dw ($-savexoff) ;;;;;;;;;;;;;;; end of per session save xmtbuf db nbuflen dup (0) ; network buffer for transmitter rcvbuf db nbuflen+3 dup (0) ; network buffer for receiver ; variables for serial interrupt handler mst dw 0 ; Modem status address mdat dw 0 ; Modem data address miir dw 0 ; modem interrupt ident register mdeoi db 0 ; End-of-Interrupt value mdmhand db 0 ; Modem status register, current mdintc dw 0 ; interrupt control address ; Information structures for IBM Netbios compatible Local Area Networks ; network constants netint equ 5ch ; Netbios interrupt nadd equ 30h ; Add name ncall equ 10h ; CALL, open a virtual circuit session ncancel equ 35h ; Cancel command in scb buffer ndelete equ 31h ; Delete Name nhangup equ 12h ; Hangup virtual circuit session nlisten equ 11h ; Listen for session caller naustat equ 33h ; Network Adapter Unit, get status of nreceive equ 15h ; Receive on virtual circuit nreset equ 32h ; Reset NAU and tables nsend equ 14h ; Send on virtual circuit nsestat equ 34h ; Session, get status of netbrk equ 70h ; STARLAN Int 5bh send Break nowait equ 80h ; no-wait, command modifier npending equ 0ffh ; Pending request exnbios equ 0400h ; Int 2ah exec netbios call, error retry ; nettype word bits netbios equ 0001h ; NetBios netone equ 0002h ; Ungermann-Bass Net/One decnet equ 0004h ; DECnet CTERM declat equ 0008h ; DECnet LAT bapi equ 0010h ; 3Com BAPI ebios equ 0020h ; EBIOS, IBM and YALE telapi equ 0040h ; TELAPI, Novell tes equ 0080h ; TES, Interconnections Inc and Novell tcpnet equ 0100h ; TCP/IP (internal) acsi equ 0200h ; EBIOS, ACSI direct to NetBios pathway bwtcp equ 0400h ; [JRS] Beame & Whiteside TCP nettype dw 0 ; kind of local area net (vendor bit field) ;xncall equ 74h ; [ohl] Net/One extended call function netci equ 6Bh ; [ohl] Net/One command interface interrupt, ; [ohl] used for the following functions: nciwrit equ 0000h ; [ohl] Net/One write function nciread equ 0100h ; [ohl] Net/One read function ncistat equ 0700h ; [ohl] Net/One status function ncicont equ 0600h ; [ohl] Net/One control function ncibrk equ 02h ; [ohl] Net/One code for a break ncidis equ 04h ; [ohl] Net/One code for disconnect ncihld equ 06h ; [ohl] code for placing a connection on hold bapiint equ 14h ; 3Com BAPI, interrupt (Bios replacment) bapicon equ 0a0h ; 3Com BAPI, connect to port bapidisc equ 0a1h ; 3Com BAPI, disconnect bapiwrit equ 0a4h ; 3Com BAPI, write block bapiread equ 0a5h ; 3Com BAPI, read block bapibrk equ 0a6h ; 3Com BAPI, send short break bapistat equ 0a7h ; 3Com BAPI, read status (# chars to be read) bapihere equ 0afh ; 3Com BAPI, presence check bapieecm equ 0b0h ; 3Com BAPI, enable/disable ECM char bapiecm equ 0b1h ; 3Com BAPI, trap Enter Command Mode char bapiping equ 0b2h ; KERMIT BAPI extension, Telnet, Ping host ; telport equ 23 ; TELAPI Telnet port telopen equ 0e0h ; xtelopen a connection telclose equ 0e1h ; xtelclose a connection telread equ 0e2h ; xtelread char(s) telwrite equ 0e3h ; xtelwrite chars telioctl equ 0e4h ; xtelioctl, ioctl the port telreset equ 0e5h ; xtelreset, reset the whole TELAPI package telunload equ 0e6h ; xtelunload, unload TELAPI TSR tellist equ 0e7h ; xtellist, list current sessions and status telattach equ 0e8h ; xtelattach, session to COM port # 0..3 telportosn equ 0e9h ; xtelportosn, return session id for port telunreac equ -51 ; network is unreachable telinuse equ -56 ; socket already in use teltmo equ -60 ; timeout on connection attempt telrefuse equ -61 ; connection refused teldwnhost equ -64 ; host is down telunkhost equ -67 ; unknown host telfull equ -301 ; all sessions are in use ; TELAPI messages and misc data telhlp db 'Internet address nnn.nnn.nnn.nnn$' telmsg1 db cr,lf,'?Badly constructed Internet address: $' telmsg2 db cr,lf,'?No connection. Status = -$' telmsg51 db cr,lf,'?Network is unreachable$' telmsg56 db cr,lf,'?Socket already in use$' telmsg60 db cr,lf,'?Timeout on connection attempt$' telmsg61 db cr,lf,'?Connection refused$' telmsg64 db cr,lf,'?Host is down$' telmsg67 db cr,lf,'?Unknown host$' telmsg301 db cr,lf,'?All sessions are in use$' telhostid db 2 dup (0) ; TELAPI Telnet internal host session ident IAC equ 255 ; B&W TCP/IP Telnet Options codes DONT equ 254 DO equ 253 WONT equ 252 WILL equ 251 SB equ 250 SE equ 240 TELOPT_ECHO equ 1 TELOPT_SGA equ 3 TELOPT_STATUS equ 5 TELOPT_TTYPE equ 24 TELOPT_NAWS equ 31 NTELOPTS equ 24 sgaflg db 0 ; B&W TCP/IP, supress go ahead flag option1 db 0 ; B&W TCP/IP, Telnet Options byte1 option2 db 0 ; B&W TCP/IP, Telnet Options byte1 optstate db 0 ; B&W TCP/IP, Telnet Options state variable bwtcpnam db 'TCP-IP10',0 ; [JRS] name of Beame & Whiteside TCP driver bwhandle dw 0 ; [JRS] handle for Beame & Whiteside TCP driver ; testalk equ 4 ; TES invoke interactive cmd interpreter tesbwrite equ 6 ; TES block write tesbread equ 7 ; TES block read tesinstal equ 0a0h ; TES installation/status report teslist equ 0a1h ; TES get list of sessions, with status tesgets equ 0a2h ; TES get list of server names tesnews equ 0a3h ; TES start a new session tesholds equ 0a4h ; TES hold currently active connection tesresume equ 0a5h ; TES resume a session (1..9) tesdrop equ 0a6h ; TES drop a session tesnexts equ 0a7h ; TES skip to next active session tesexec equ 0a8h ; TES send string to cmd interpreter tesport dw 0 ; TES low byte = intercepted port tesquiet db 'ACTION NONE',0 ; TES Stop command prompting tesses db 0 ; TES session number (1..9 is legal) tesname db 50 dup (0) ; TES host name asciiz teshelp db cr,lf,'?Host name or "*" to see available hosts' db ' or press ENTER to resume a connection$' tesnlist db cr,lf,' Active TES hosts:$' tesnhost db cr,lf,'?No existing connection.' db ' Please select a host with SET PORT TES host$' teslat db 0 ; non-zero if using TES over LAT ;; pcnet values: 0 no network available at all ;; 1 network board reports itself as present ;; 2 and session is in progress ;; extrn byte pcnet is defined in msster. ; NetBios (StarGROUP and Opennet) port_nb prtinfo <-1,0,defpar,3,0,defhand,floxon,0,0,send,receive,nbclose> ; Ungermann Bass, 3ComBAPI, TELAPI port_ub prtinfo <-1,0,defpar,3,0,defhand,floxon,0,0,ubsend,ubrecv,ubclose> ; DECnet LAT and CTERM and TES-LAT port_dec prtinfo <-1,0,defpar,3,0,defhand,floxon,0,0,decsnd,decrcv,decclose> ; TES port_tes prtinfo <-1,0,defpar,3,0,defhand,floxon,0,0,tessnd,tesrcv,tesclose> scbst struc ; Session (Network) Control Block [PCnet comp] scb_cmd db 0 ; command code for Netbios Int 5ch scb_err db 0 ; error return or request is pending scb_vcid db 0 ; virtual circuit ident number scb_num db 0 ; local name-number scb_baddr dw 0 ; buffer address, offset dw data ; and segment scb_length dw 0 ; length of buffer data scb_rname db '* ' ; remote name, 16 chars space scb_lname db ' ' ; local name filled db 0 ; Receive timeout (0.5 sec units), want 0 db 0 ; Send timeout (0.5 sec units), want 0 scb_post dw 0 ; interrupt driven post address, offset dw code ; and segment db 0 ; LAN_num (adapter #), set to zero for STARLAN scb_done db 0 ; command complete status ; the 14 bytes below are normally 'reserved' ; STARLAN uses 5 for long/special call names ; together with STARLAN specific Int 5bh scb_vrname dw 0,0 ; Variable length call name ptr offset,segment scb_vrlen db 0 ; length of vrname db 9 dup (0) ; reserved scbst ends ; 64 bytes overall rcv scbst <,,,,rcvbuf,,length rcvbuf,,,,,rpost>; declare scb for rcvr xmt scbst <,,,,xmtbuf,,length xmtbuf,,,,,spost>; for xmtr lsn scbst <,,,,xmtbuf,,length xmtbuf,,,,,lpost>; for server listen can scbst <> ; for cancels ; DECnet material decint equ 69h ; CTERM interrupt dpresent equ 100h ; CTERM Installation check dsend equ 101h ; CTERM send byte dread equ 102h ; CTERM read byte dcstat equ 103h ; CTERM status ddstat equ 104h ; CTERM Decnet status dopen equ 105h ; CTERM open session dclose equ 106h ; CTERM close session dgetscb equ 10ah ; CTERM get SCB size latint equ 6ah ; LAT interrupt latsend equ 1 ; LAT send byte latread equ 2 ; LAT read byte latstat equ 3 ; LAT status latsendb equ 4 ; LAT send block (v4) latreadb equ 5 ; LAT read block (v4) latinfo equ 6 ; LAT get miscellaneous information latsrv equ 0d500h ; LAT get next service name latopen equ 0d0ffh ; LAT open latclose equ 0d000h ; LAT close latbreak equ 0d100h ; LAT send a BREAK latscbget equ 0d800h ; LAT get SCB interior to LAT latscbfree equ 0d801h ; LAT free SCB interior to LAT latcpyems equ 0d900h ; LAT copy to/from SCB in EMS or not decneth dw 0 ; CTERM session handle decseg dw 0 ; segment of CTERM SCB memory block lathand dw 0 ; LAT session handle, high byte = 0ffh latseg dw 0 ; LAT SCB seg in our memory latversion db 4 ; LAT major version number latscbptr dd 0,0,0 ; LAT, pointer to SCB lcbst struc ; LAT control block structure V4 service db 17 dup (0) ; 0 service (number is offset) db 10 dup (0) ; 17 node, for future use lat_pwd dd 0 ; 27 password buffer ptr pwd_len db 0 ; 31 length of the buffer db 22 dup (0) ; 32 reserved stopped dd 0 ; 54 session stopped post routine addr overflow dd 0 ; 58 service table overflow post addr xnotify dd 0 ; 62 transmit post routine addr rnotify dd 0 ; 66 receive post routine addr sstatus dw 0 ; 70 session status db 270 dup (0) ; 72 reserved slotqty db 2 ; 342 number receive data slots slotused db 0 ; 343 number occupied slots slotnr db 0 ; 344 index of next rcv slot to use slotcur db 0 ; 345 index of current rcv slot slotptr dw 0 ; 346 ptr to first received char slottbl dw 0 ; 348 ptrs to bufs for slot 1 dw 0 ; 350 and for slot 2 slotbf1 db 259 dup (0) ; 352 first receive buffer slotbf2 db 259 dup (0) ; 611 second receive buffer lcbst ends ; total of 870 bytes latservice db 17 dup (0) ; LAT host name latpwd db 16 dup (0),0 ; LAT password, terminator decmsg1 db cr,lf,'Cannot create DECnet session.$' decmsg3 db ' DECnet Error $' decmsg4 db cr,lf,' CTERM ready$' decmsg5 db cr,lf,' LAT ready$' ; end of DECnet and TES-LAT pcnet db 0 ; Network is functioning nambuf db 65 dup (0) ; network long name storage (STARLAN) newnambuf db 0 ; non-zero if new entry into namebuf above internet db 4 dup (0) ; TELAPI Internet address, binary telses dw 0 ; TELAPI session number sposted db 0 ; send interlock, 0 if no send posted rposted db 0 ; rcv interlock, 0 if no receive posted lposted db 0 ; listen outstanding (if non-zero) netdbfr db 0 ; non-zero if net board is double buffered lnamestat db 0 ; status of local name 0 = default, ; 1 = specified by user, 2 = locked in deflname db 'mskermit.K ' ; default local name, 16 bytes ivt1str db 'iVT1',0 ; FGR - OpenNet VT handshake string inettyp db 0 ; FGR - network type 'N' or 'O' nsbrk dw 0 ; net can send Break starlan db 0 ; non-zero if StarLAN net chkmsg1 db cr,lf,'?Cannot construct a local Kermit name, error = $' setnbad db cr,lf,'?Local Kermit NetBIOS name is already fixed.$' chkmsg2 db cr,lf,lf,' Name $' chkmsg3 db ' is already in use. Please enter another of',cr,lf setnbhlp db ' 1 - 14 letters or numbers (or nothing to quit): $' netmsg1 db cr,lf,' Checking if our node name is unique ...$' netmsg2 db cr,lf,' The network is active, our name is $' netmsg3 db cr,lf,' NetBios local name: $' netmsg4 db ' Remote host: $' netmsg5 db cr,lf,' DECnet host: $' netmsg6 db cr,lf,' TELAPI Internet host: $' netmsg7 db cr,lf,' TES host name: $' netmsg8 db cr,lf,' EBIOS server port name: $' nonetmsg db cr,lf,'?The network is not available$' noname db cr,lf,'?No name exists for the remote host.$' nethlp db cr,lf,' node name of remote system,' db cr,lf,' or press ENTER to use current name,' db cr,lf,' or press ENTER for server mode (NetBios only).$' dnethlp db cr,lf,' node name of remote system,' db cr,lf,' or press ENTER to use current name,' db cr,lf,' or * to see a list of LAT service names.$' nethlp2 db cr,lf,' Optional LAT password, if using a LAT connection$' dnetsrv db cr,lf,' Available LAT service names:',cr,lf,'$' ngodset db cr,lf,' Connecting to network node: $' nbadset db bell,cr,lf,'?Cannot reach network node: $' recmsg db cr,lf,'?Network receive failed, status = $' sndmsg db cr,lf,'?Network send failed, status = $' naskpmt db cr,lf,' A network session is active.',cr,lf db ' Enter RESUME to resume it or NEW to start a new session:',0 nettab db 2 mkeyw 'New',0 mkeyw 'Resume',1 acnop equ 80h ; ACSI nop ; second byte: null (ignored) acenable equ 81h ; ACSI raise modem leads ; second byte: DTR=01h, RTS=02h acdisable equ 82h ; ACSI drop all modem leads ; second byte: null (ignored) acbreak equ 83h ; ACSI send a BREAK ; second byte: null (ignored) acsetmode equ 84h ; ACSI set port Mode (speed etc) ; second byte: speed=3bits, parity=2bits, stopbits=1bit, databits=2bits acmodem equ 85h ; ACSI return modem leads state ; second byte: DCD=80h, RI=40h, DSR=20h, CTS=10h acreqmodem equ 86h ; ACSI request modem leads state ; second byte: DCD=80h, RI=40h, DSR=20h, CTS=10h acdelay equ 87h ; ACSI pause transmission ; second byte: delay in hundreths of second acpace equ 88h ; ACSI set flow control or pacing ; second byte: direction send=10h, recv=20h; if pacing send=1, recv=2 acsetxon equ 89h ; ACSI set XON pacing character ; second byte: char to represent resume transmission acsetxoff equ 8ah ; ACSI set XOFF pacing character ; second byte: char to represent cease transmission ; ACSI general read character status: BREAK detected=10h, framing error=08h, ; parity error=04h, overrun=02h ebbufset equ 0ffh ; EBIOS set buf mode (1=send, 2=rcv) ebbufcnt equ 0fdh ; EBIOS get buf count (1=send, 2=rcv) ebpace equ 0feh ; EBIOS set pacing mode (80h=send) ebrcv equ 0fch ; EBIOS receive, no wait ebsend equ 1 ; EBIOS send a char ebmodem equ 0fbh ; EBIOS set modem leads ebbreak equ 0fah ; EBIOS send a BREAK ebcontrol equ 0f9h ; EBIOS regain control ebredir equ 0f6h ; EBIOS do port redirection ebquery equ 0f5h ; EBIOS get redirection info ebpresent equ 0f4h ; EBIOS presence check ebport dw 0 ; EBIOS equivalent serial port 0..3 ebcoms db 0,0 ; adapter (port), path (80h=network) db 16 dup (0) ; Call name (host) db 16 dup (0) ; Listen name (null) db 16 dup (0) ; local name (null = use lan adapter) db 0 ; unique name (1 = group name) ebhlp db 'Name of server port$' ebmsg2 db cr,lf,'?No server port name is known,' db ' reenter the command with a name.$' ebmsg3 db cr,lf,'?Unable to contact that port. Error code=$' ebiostab db 4 ; EBIOS table of local port names mkeyw '1',1 mkeyw '2',2 mkeyw '3',3 mkeyw '4',4 tcpadrst db cr,lf,' tcp/ip address: $' ; TCP/IP status msgs tcpsubst db cr,lf,' tcp/ip subnetmask: $' tcpdomst db cr,lf,' tcp/ip domain: $' tcpgatest db cr,lf,' tcp/ip gateway: $' tcppnsst db cr,lf,' tcp/ip primary-nameserver: $' tcpsnsst db cr,lf,' tcp/ip secondary-nameserver: $' tcpbcstst db cr,lf,' tcp/ip broadcast: $' tcphostst db cr,lf,' tcp/ip host: $' tcpportst db cr,lf,' tcp/ip port: $' tcpdebst db cr,lf,' tcp/ip debug-Options: $' tcppdintst db ', Packet-Driver-interrupt: \x$' tcppdnul db ' (search for it)$' tcpodi db ' using ODI interface$' tcpttyst db cr,lf,' tcp/ip telnet-term-type: $' tcpttynul db '(report real terminal type)',0 ; ASCIIZ tcpnlst db cr,lf,' tcp/ip newline-mode: $' tcpnlmsg0 db 'off (CR->CR NUL)$' tcpnlmsg1 db 'on (CR->CR LF)$' tcpdeboff db 'off$' tcpdebon db 'on$' tcphlp db cr,lf,' Host Internet name machine.domain or' db ' Internet address nnn.nnn.nnn.nnn' db cr,lf,' or * to become a Telnet server.' db cr,lf,' Optional TCP port number may follow the host name.$' tcpporthlp db cr,lf,' TCP port on host, 23 is Telnet.$' tcpbtpst db ' from Bootp host: $' badport db cr,lf,'?Ports 25 is forbidden, sorry. Using 23 for Telnet.$' maxsessions equ 6 ; max sessions, also in msntnd.c seslist db maxsessions dup (-1) ; list of Telnet session idents, -1=dead seshostlen equ 61 ; length of host name, asciiz sesname db maxsessions*seshostlen dup (0) ; host names, asciiz. sescur dw -1 ; Current session (0..5) sesheader db cr,lf,' status session hostname$' sesinact db cr,lf,' inactive $' sesactive db cr,lf,' active $' curmsg db cr,lf,' current > $' sesnone db cr,lf,' Error, all sessions are in use$' sesnohost db cr,lf,' Oops, no host name is available$' seshelp db cr,lf,lf,' choices R return to active session' db cr,lf,' 1..6 pick a new or existing session' db cr,lf,' N start a new session (default)' db cr,lf db cr,lf,'Choice> $' data ends code1 segment assume cs:code1 extern atsclr:near, setpos:near, setatch:near, termswapout:far extern termswapin:far, termswapdel:far fatsclr proc far call atsclr ret fatsclr endp fsetatch proc far call setatch ret fsetatch endp fsetpos proc far call setpos ret fsetpos endp code1 ends code segment extrn comnd:near, prompt:near, dopar:near, lclyini:near extrn strcpy:near, strlen:near,decout:near, prtasz:near, prtscr:near extrn kbsusp:near, kbrest:near ; in msuibm.asm extrn strcat:near, valout:near, crun:near, katoi:near, tolowr:near extrn trnmod:near assume cs:code, ds:data, es:nothing fprtasz proc far call prtasz ret fprtasz endp fpcwait proc far call pcwait ret fpcwait endp fstrlen proc far call strlen ret fstrlen endp fdecout proc far call decout ret fdecout endp fvalout proc far call valout ret fvalout endp foutchr proc far call outchr ret foutchr endp fdopar proc far call dopar ret fdopar endp ; local initialization lclini proc near call pcwtst ; calibrate software timer call pcwtst mov flags.comflg,1 ; assume COM1 for communications port call model ; get model of IBM machine mov lclsusp,offset suspend ; call this when suspending to DOS mov lclrest,offset restore ; call this when returning from DOS mov lclexit,offset finexit ; call this when exiting Kermit call getcodep ; get Code Page ident call lclyini ; let other modules initialize too... ret lclini endp ; Call these routines when suspending Kermit to go to DOS suspend proc near call kbsusp ; DEC LK250 keyboard, set back to DOS mode cmp flags.comflg,'t'; doing TCP? je suspen1 ; e = yes, don't touch port call ihosts ; suspend the host mov ax,20 ; wait 20 millisec for port to finish call pcwait call serrst suspen1:ret suspend endp ; Call these routines when returning to Kermit from DOS restore proc near call getcodep ; reset Code Page ident call kbrest ; DEC LK250 keyboard, set back to DEC mode cmp flags.comflg,'t'; doing TCP? je restor1 ; e = yes, don't touch port call serini ; reinit serial port call ihostr ; resume the host restor1:ret restore endp ; Call these routines when doing final exit of Kermit finexit proc near call serrst ; reset serial port cmp nettype,0 ; any network connections open? je finex2 ; e = no, but go through the motions anyway mov dx,offset clomsg ; say connection going, ask for permission call prompt mov dx,offset clotab ; table of choices xor bx,bx ; help mov ah,cmkey ; get keyword call comnd pushf mov ah,cmeol call comnd popf jnc finex1 ; nc = got good response ret ; return carry set to say don't close finex1: or bx,bx ; ok to close jz finex2 ; e = yes stc ; carry set to say don't close ret finex2: call netclose ; close network connections call kbsusp ; DEC LK250 keyboard, set back to DOS mode clc ; return with permission to exit ret finexit endp ; The IBM PC's. model proc near mov isps2,0 ; PS/2 present indicator push es push ax ; get IBM model code mov al,byte ptr es:[0fffeh] ; get model id byte mov ah,0ch ; AT and PS/2 configuration call xor al,al int 15h ; IBM Bios jc modelx ; c = no information cmp word ptr es:[bx+2],040fch ; PS/2 model 50? je model3 ; e = yes cmp word ptr es:[bx+2],050fch ; PS/2 model 60? je model3 ; e = yes cmp byte ptr es:[bx+2],0f8h ; PS/2 model 80? jne modelx ; ne = no model3: mov isps2,1 ; say real PS/2 for IRQ setting modelx: pop ax pop es ret model endp ; Get the currently active Code Page ident into flags.chrset. User defined ; table overrides DOS report. getcodep proc near cmp flags.chrset,1 ; user-defined table in use? je getcod1 ; e = yes cmp flags.chrset,866 ; forced CP866 in use? je getcod1 ; e = yes mov flags.chrset,437 ; find default global char set cmp dosnum,0300h+30 ; DOS version 3.30 or higher? jb getcod1 ; b = no, no Code Pages mov ax,6601h ; get global Code Page int dos ; bx=active Code Page, dx=boot CP jc getcod1 mov flags.chrset,bx ; setup default SET FILE CHAR SET mov vtcpage,bx ; set terminal Code Page too getcod1:ret getcodep endp ; show the definition of a key. The terminal argument block (which contains ; the address and length of the definition tables) is passed in ax. ; Returns a string to print in AX, length of same in CX. ; Returns normally. Obsolete, name here for external reference only. showkey proc near ret ; return showkey endp code ends code1 segment assume cs:code1 ftcpstats proc far ; TCP/IP status display mov ah,prstr mov dx,offset tcpadrst int dos mov dx,tcpdata[0] ; offset of tcpaddress string call fprtasz mov bx,tcpdata[22] cmp byte ptr [bx],0 ; bootp host? je ftcpst4 ; e = no mov dx,offset tcpbtpst ; show title int dos mov dx,tcpdata[22] ; show host IP call fprtasz ftcpst4:mov dx,offset tcpsubst int dos mov dx,tcpdata[2] ; offset of tcp subnetmask string call fprtasz mov dx,offset tcpdomst int dos mov dx,tcpdata[4] ; offset of tcp domain string call fprtasz mov dx,offset tcpgatest int dos mov dx,tcpdata[6] ; offset of tcp gateway string call fprtasz mov dx,offset tcppnsst int dos mov dx,tcpdata[8] ; offset of tcp primary nameserver call fprtasz mov dx,offset tcpsnsst int dos mov dx,tcpdata[10] ; offset of tcp secondary nameserver call fprtasz mov dx,offset tcpbcstst int dos mov dx,tcpdata[14] ; offset of tcp broadcast address call fprtasz mov dx,offset tcpportst int dos push ax push bx push cx mov bx,tcpdata[16] ; offset of tcp port mov ax,[bx] call fdecout mov bx,tcpdata[18] ; offset of Packet Driver interrupt mov ax,[bx] cmp ax,'DO' ; using ODI? jne ftcpst3 ; ne = no mov ah,prstr mov dx,offset tcpodi ; say using ODI interface int dos jmp short ftcpst1 ftcpst3:push ax ; save value mov ah,prstr mov dx,offset tcppdintst int dos pop ax mov cx,16 push ax call fvalout ; show value as hex pop ax or ax,ax ; null? jnz ftcpst1 ; nz = no, just show value mov ah,prstr mov dx,offset tcppdnul ; show search msg int dos ftcpst1:pop cx pop bx pop ax mov dx,offset tcpttyst int dos mov dx,tcpdata[20] ; offset of tcp term-type override push bx mov bx,dx cmp byte ptr [bx],0 jne ftcpst2 mov dx,offset tcpttynul ; alternate msg ftcpst2:pop bx call fprtasz mov dx,offset tcpnlst ; newline mode msg int dos push bx mov bx,tcpdata[24] ; offset of tcpnewline mov bl,[bx] ; value of 0 (off) or 1 mov dx,offset tcpnlmsg0 ; assume off or bl,bl ; off? pop bx jz ftcpst5 ; z = yes mov dx,offset tcpnlmsg1 ; say on ftcpst5:mov ah,prstr int dos mov dx,offset tcpdebst ; debug-option int dos push bx mov bx,tcpdata[26] ; offset of tcpdebug mov bl,[bx] ; value of 0 (off) or 1 mov dx,offset tcpdeboff ; assume off or bl,bl ; off? pop bx jz ftcpst6 ; z = yes mov dx,offset tcpdebon ; say on ftcpst6:mov ah,prstr int dos mov dx,offset tcphostst int dos mov dx,tcpdata[12] ; offset of tcp host ident string call fprtasz ret ftcpstats endp code1 ends code segment assume cs:code ; SHOW MODEM, displays current status of lines DSR, CD, and CTS. ; Uses byte mdmhand, the modem line status register. shomodem proc near mov ah,cmeol ; get a confirm call comnd jnc shomd1a ; nc = success ret shomd1a:mov dx,offset msmsg7 ; no modem status for network call getmodem ; get modem status mov mdmhand,al mov ah,prstr mov dx,offset msmsg1 ; modem ready msg test mdmhand,20h ; is DSR asserted? jz shomd1 ; z = no mov dx,offset msmsg2 ; say not asserted shomd1: int dos mov dx,offset msmsg3 ; CD asserted msg test mdmhand,80h ; CD asserted? jz shomd2 ; z = no mov dx,offset msmsg4 ; say not asserted shomd2: int dos mov dx,offset msmsg5 ; CTS asserted msg test mdmhand,10h ; CTS asserted? jz shomd3 ; z = no mov dx,offset msmsg6 ; say not asserted shomd3: mov ah,prstr int dos mov al,flags.comflg cmp al,'1' ; UART? jae shomd3c ; ae = no add al,'0' ; COMnumber mov msmsg8+7,al ; stuff in msg mov ah,prstr mov dx,offset msmsg8 ; show port base address int dos mov ax,modem.mddat ; port address mov cx,16 ; in hex call valout mov ah,prstr mov dx,offset msmsg9 ; and IRQ int dos mov ax,modem.mdintv ; interrupt vector mov cl,al and ax,7 ; lower three bits of IRQ cmp cl,60h ; using cascaded 8259? jb shomd3a ; b = no add ax,8 ; say IRQ 8..15 shomd3a:call decout ; output as decimal cmp fifo,0 ; UART FIFO active? je shomd3c ; e = no mov dx,offset msmsg10 ; FIFO msg mov ah,prstr int dos shomd3c:call ftcpstats ; call TCP/IP FAR worker mov dx,offset netmsg3 ; local name int dos mov cx,16 mov di,offset deflname ; default Netbios name call prtscr cmp rcv.scb_lname,' ' ; have NetBios name yet? jbe shomd4 ; be = no, skip this part mov ah,prstr mov dx,offset netmsg4 ; remote name int dos mov cx,16 mov di,offset rcv.scb_rname call prtscr shomd4: cmp latservice,0 ; DECnet name available? je shomd5 ; e = no mov ah,prstr mov dx,offset netmsg5 cmp teslat,0 ; TES-LAT instead? je shomd4a ; e = no mov dx,offset netmsg7 ; TES heading shomd4a:int dos mov dx,offset latservice ; network host name, asciiz call prtasz shomd5: cmp word ptr internet,0 ; have TELAPI Internet address? je shomd7 ; e = no mov ah,prstr mov dx,offset netmsg6 int dos xor bx,bx ; subscript mov cx,4 ; four fields shomd6: mov al,internet[bx] ; binary internet address xor ah,ah call decout cmp cx,1 ; doing last field? je shmod6a ; e = yes, no dot mov dl,'.' mov ah,conout int dos shmod6a:inc bx loop shomd6 shomd7: cmp tesname,0 ; have TES name? je shomd8 ; e = no mov ah,prstr mov dx,offset netmsg7 int dos mov dx,offset tesname ; node name call prtasz ; show, asciiz clc ret shomd8: cmp ebcoms+2,0 ; have an EBIOS name? je shomd9 ; e = no mov ah,prstr mov dx,offset netmsg8 int dos mov cx,16 mov di,offset ebcoms+2 ; host port, 16 chars space filled call prtscr shomd9: clc ret shomodem endp ; Get modem status and set global byte mdmhand. Preserve all registers. getmodem proc near ; gets modem status upon request cmp portin,1 ; port active? je getmod1 ; e = yes mov bl,flags.comflg ; pass current port ident cmp bl,'4' ; above UART and Bios? ja getmod1 ; a = yes, do not start the port call comstrt ; do SET PORT command now jnc getmod1 ; nc = success ret ; failed to set port getmod1:xor al,al ; assume nothing is on cmp flags.comflg,'1' ; UART? jae getmod2 ; ae = no cmp flags.comflg,0 ; null port? je getmodx ; e = yes, no status mov dx,modem.mdstat ; hardware, line status reg inc dx ; modem status reg in al,dx jmp short getmodx getmod2:cmp flags.comflg,'4' ; above Bios? (networks) ja getmod3 ; a = yes, no status mov ah,3 ; ask Bios for modem status into al push dx mov dl,flags.comflg ; get port id sub dl,'1' ; remove ascii bias (BIOS1 -> 0) int rs232 pop dx getmod3:cmp flags.comflg,'E' ; IBM EBIOS? jne getmodx ; ne = no mov ah,3 ; get Bios style modem status push dx mov dx,ebport ; current EBIOS port int rs232 pop dx getmodx:xor ah,ah ; return status in al clc ret getmodem endp ; Clear the input buffer. This throws away all the characters in the ; serial interrupt buffer. This is particularly important when ; talking to servers, since NAKs can accumulate in the buffer. ; Returns normally. CLRBUF PROC NEAR cmp repflg,0 ; REPLAY? je clrbuf1 ; e = no ret clrbuf1:call prtchr ; read from active comms port jnc clrbuf1 ; nc = got a char, continue til none mov ax,10 ; wait 10 ms call pcwait call prtchr ; read from active comms port jnc clrbuf1 ; nc = got a char, continue til none mov lastread,0 clc ret CLRBUF ENDP ; Clear to the end of the current line. Returns normally. ; Upgraded for Topview compatibility. CLEARL PROC NEAR push ax push bx push dx mov ah,3 ; Clear to end of line xor bh,bh int video ; Get current cursor position into dx mov ax,dx ; Topview compatible clear line mov bh,ah ; same row mov bl,byte ptr low_rgt ; last column call fatsclr ; clear from ax to bx, screen coord pop dx pop bx pop ax ret CLEARL ENDP ; This routine blanks the screen. Returns normally. ; Upgraded to Topview compatiblity. CMBLNK PROC NEAR push ax push bx xor ax,ax ; from screen loc 0,0 mov bx,low_rgt ; to end of text screen (lower right corner) inc bh ; include status line call fatsclr ; do Topview compatible clear, in msyibm pop bx pop ax ret CMBLNK ENDP ; Locate: homes the cursor. Returns normally. LOCATE PROC NEAR xor dx,dx ; Go to top left corner of screen jmp poscur LOCATE ENDP ; Position the cursor according to contents of DX: ; DH contains row, DL contains column. Returns normally. POSCUR PROC NEAR push ax push bx mov ah,2 ; Position cursor xor bh,bh ; page 0 int video pop bx pop ax ret POSCUR ENDP ; Delete a character from the screen. This works by printing ; backspaces and spaces. DODEL PROC NEAR mov ah,prstr mov dx,offset delstr ; Erase character int dos ret DODEL ENDP ; Move the cursor to the left margin, then clear to end of line. CTLU PROC NEAR mov ah,prstr mov dx,offset clrlin int dos jmp clearl CTLU ENDP BEEP PROC NEAR mov timeract,1 ; say timer chip is being used here push ax push cx mov al,10110110B ; Gen a short beep (long one losses data.) out timercmd,al ; set Timer to to mode 3 mov ax,1512 ; divisor, for frequency out timer2data,al ; send low byte first mov al,ah out timer2data,al in al,ppi_port ; get 8255 Port B setting or al,3 ; turn on speaker and timer out ppi_port,al ; start speaker and timer push ax mov ax,40 ; 40 millisecond beep, calibrated time call pcwait pop ax in al,ppi_port and al,0fch ; turn off speaker and timer out ppi_port,al pop cx pop ax mov timeract,0 ; say timer chip is no longer in use here clc ret BEEP ENDP ; write a line in inverse video at the bottom of the screen... ; the line is passed in dx, terminated by a $. Returns normally. putmod proc near push ax ; save regs push bx push cx push dx push si mov si,dx ; preserve message mov bl,scbattr ; screen attributes at Kermit init time push bx ; save scbattr and bl,77h ; get colors, omit bright and blink rol bl,1 ; interchange fore and background rol bl,1 rol bl,1 rol bl,1 mov scbattr,bl call clrmod ; clear mode line to inverse video mov dx,low_rgt ; lower right corner inc dh ; of status line xor dl,dl ; start on left mov ah,scbattr ; inverse video attribute cld putmo1: lodsb ; get a byte cmp al,'$' ; end of string? je putmo2 call fsetatch ; write char and attribute inc dl ; increment for next write cmp dl,crt_cols ; beyond physical right border? jb putmo1 ; b = no putmo2: pop bx mov scbattr,bl pop si pop dx pop cx pop bx pop ax ret putmod endp ; clear the mode line written by putmod. clrmod proc near push ax ; save regs push bx mov bx,low_rgt ; ending location is lower right corner inc bh ; of status line mov ah,bh xor al,al ; column zero call fatsclr ; clear this region pop bx pop ax ret clrmod endp ; put a help message on the screen. This one uses reverse video... ; pass the message in ax, terminated by a null. puthlp proc near push bx ; save regs push cx push dx push si push ax ; preserve this cld mov bl,scbattr ; screen attributes at Kermit init time and bl,77h ; get colors, omit bright and blink rol bl,1 ; interchange fore and background rol bl,1 rol bl,1 rol bl,1 xor bh,bh ; preset page 0 mov temp,bx ; temp = page 0, reverse video mov si,ax ; point to it mov dh,1 ; init counter puthl1: lodsb ; get a byte cmp al,lf ; linefeed? jne puthl2 ; no, keep going inc dh ; count it jmp short puthl1 ; and keep looping puthl2: or al,al ; end of string? jnz puthl1 ; nz = no, keep going mov ax,600h ; scroll to clear window xor cx,cx ; from top left mov dl,4fh ; to bottom right of needed piece mov bh,70h ; inverse video mov bh,bl ; inverse video int video call locate ; home cursor mov bx,0070h ; bh = page 0, bl = inverse video mov bx,temp mov cx,1 ; one char at a time cld ; scan direction is forward pop si ; point to string again puthl3: lodsb ; get a byte or al,al ; end of string? jz puthl4 ; z = yes, stop push si ; save around bios call cmp al,' ' ; printable? jb puth21 ; b = no mov ah,9 ; write char at current cursor position int video ; do the Bios int 10h call inc dl ; point to next column jmp short puth23 ; move cursor there puth21: cmp al,cr ; carriage return? jne puth22 ; ne = no xor dl,dl ; set to column zero jmp short puth23 puth22: cmp al,lf ; line feed? jne puth23 inc dh ; go to next line puth23: mov ah,2 ; set cursor position to dx int video pop si ; restore pointer jmp short puthl3 ; and keep going puthl4: mov dh,byte ptr low_rgt+1 ; go to last line inc dh xor dl,dl call poscur ; position cursor pop si pop dx pop cx pop bx ret puthlp endp ; set the current port. ; Note: serial port addresses are found by looking in memory at 40:00h and ; following three words for COM1..4, resp. All UARTS are assumed to follow ; std IBM addresses relative to 03f8h for COM1, and actual address are offset ; from value found in segment 40h. Global byte flags.comflg is 1,2,3,4 for ; COM1..4, and is 'N' for NetBios, etc. ; 'O' is for Intel Opennet Network (FGR) ; If address 02f8h is found in 40:00h then name COM1 is retained but COM2 ; addressing is used to access the UART and a notice is displayed. IRQ 3 ; or IRQ 4 is sensed automatically for any COMx port. COMS PROC NEAR mov dx,offset comptab ; table of legal comms ports xor bx,bx ; no extra help text mov ah,cmkey ; parse key word call comnd jnc coms0a ; nc = success ret ; failure coms0a: cmp bl,'4' ; networks? ja comstrt ; a = yes mov ah,cmeol ; non-network push bx call comnd ; get a confirm pop bx jnc comstrt ; nc = success ret ; failure COMSTRT:mov temp,bx ; port ident is in BL cmp bl,'N' ; NetBios network? jne comst2a ; ne = no jmp comsn ; yes, get another item for networks comst2a:cmp bl,'O' ; Opennet network? jne comst2 ; ne = no jmp comso ; yes, get another item for networks comst2: cmp bl,'U' ; Ungermann Bass net? jne comst3 ; ne = no jmp comsub comst3: cmp bl,'D' ; DECnet? jne comst4 ; ne = no jmp comsd ; do DECnet startup comst4: cmp bl,'E' ; IBM EBIOS? jne comst5 ; ne = no test nettype,acsi ; NetBios without EBIOS.COM? jz comst4a ; z = no, using EBIOS.COM mov inettyp,bl ; set type code jmp comso2 ; do NetBios setup comst4a:jmp comse ; do EBIOS checkup comst5: cmp bl,'W' ; Novell NASI? jne comst6 ; ne = no jmp comsub comst6: cmp bl,'C' ; 3Com BAPI? jne comst7 ; ne = no jmp comsbapi comst7: cmp bl,'T' ; Novell TELAPI jne comst8 ; ne = no jmp comstelapi comst8: cmp bl,'I' ; TES? jne comst9 ; ne = no jmp comsteslat comst9: cmp bl,'t' ; Telnet, internal? jne comst10 ; ne = no jmp comstn comst10:cmp bl,'b' ; [JRS] Beame & Whiteside TCP? jne coms1c ; [JRS] jmp comsbw ; setup BW connection ; stop sources of NetBios interrupts coms1c: call nbclose ; close NetBios session now coms2: call serrst ; close current comms port mov al,byte ptr temp ; get COMx (1-4) mov flags.comflg,al ; remember port ident cmp al,'1' ; Bios? jb coms2a ; b = no, hardware sub al,'0' ; remove ascii bias for portinfo coms2a: dec al xor ah,ah ; count ports from 0 push bx ; set port structure mov bx,type prtinfo ; size of each portinfo structure mul bl ; times port number pop bx ; restore register add ax,offset port1 ; plus start of COM1 mov portval,ax ; points to our current port struct cmp flags.comflg,'1' ; Bios path? jb coms4 ; b = no, check hardware add ax,offset portb1-offset port1 ; correct to use Bios ports mov portval,ax clc ret coms4: cmp portin,-1 ; serial port touched yet? jne coms4a ; ne = yes, else avoid init looping mov portin,0 ; say serial port is being touched coms4a: push es mov ax,40h ; look at RS232_base [bx] in Bios area 40:00h mov es,ax mov bx,temp ; get desired port number 1..4 xor bh,bh dec bl ; count com1 as bl = 0, etc shl bx,1 ; make bx a word index mov ax,es:[bx] ; get modem base address into ax pop es push bx ; save this index or ax,ax ; is address zero? jnz comsc ; nz = no, have port address mov ah,prstr mov dx,offset badprt ; tell them what we are doing int dos mov ax,defcom[bx] ; get default COMn port address push ax mov cx,16 ; base 16 call valout ; show port pop ax comsc: ; hardware tests mov modem.mddat,ax ; set base address (also data address) 03f8h add ax,2 mov modem.mdiir,ax ; interrupt identification reg 03fah inc ax ; increment to command port 03fbh mov modem.mdcom,ax ; set line control register address add ax,2 ; increment to status port 03fdh mov modem.mdstat,ax ; set line-status port address call chkport ; get type of UART support pop bx ; recover port index jc comsnu ; c = not a real 8250 class UART mov ax,40h push es mov es,ax mov ax,modem.mddat ; get COMn port address mov es:[bx],ax ; force into seg 40h pop es call chkint ; find IRQ for the port jnc comsc1 ; nc = found, else error condition ret comsc1: call getbaud ; update current baud info for port clc ret ; success ; no UART comsnu: mov ah,prstr ; tell user about Bios pathway mov dx,offset biosmsg int dos mov dl,byte ptr temp ; selected hardware port add dl,'0' ; map to Bios mov flags.comflg,dl mov ah,conout ; say port number int dos stc ; say error ret ; Opennet Network support (FGR) comso: mov inettyp,'O' ; remember OpenNet type network jmp short comso2 ; do generic network code ; NetBios Network support comsn: mov inettyp,'N' ; remember Netbios type network comso2: mov ah,cmword ; get a word (remote node name) mov dx,offset decbuf ; work buffer mov word ptr decbuf,0 ; insert terminator mov bx,offset nethlp ; help message call comnd ; get the name, ignore errors mov newnambuf,al ; save number of chars entered mov ah,cmeol call comnd ; get a confirm jc comsn2 ; c = failure ; Enter here from EBIOS when EBIOS.COM is not installed. Use 'E' ; and nettype subident of abios. comsn3: call serrst ; reset serial port cmp newnambuf,0 ; any name given? je comsn1 ; e = no, use current name mov si,offset decbuf mov di,offset nambuf ; copy to here call strcpy comsn1: call chknet ; start network usage jc comsn2 ; c = failed cmp pcnet,0 ; is network alive (non-zero)? jne comsn4 ; ne = yes comsn2: stc ret ; failure comsn4: mov portval,offset port_nb ; set Network port structure address mov port_nb.portrdy,1 ; say the comms port is ready mov al,inettyp ; FGR - get saved network type mov flags.comflg,al ; set the Netbios port flag clc ; return success ret ; End NetBios ; Ungermann-Bass terminal port [ohl +] comsub: push bx ; save net type U or W mov ah,cmeol call comnd ; get a confirm jc comsub0 ; c = failure call serrst ; reset serial port call chkub ; check UB network presence pop bx ; recover net type U or W jnc comsub1 ; nc = present comsub0:ret ; return failure comsub1:mov portval,offset port_ub ; set Network port data structure address mov port_ub.portrdy,1 ; say the comms port is ready mov flags.comflg,bl ; set the comm port flag mov pcnet,2 ; network is present and active clc ; return success ret ; End Ungermann Bass / Novell NASI ; TESLAT comsteslat: mov teslat,1 ; say TES over LAT (vs DECnet) jmp short comsd1 ; common code ; DECnet comsd: mov teslat,0 ; DECnet over LAT or CTERM comsd1: mov ah,cmword ; get a word (remote node name) mov dx,offset decbuf ; work buffer mov word ptr decbuf,0 ; insert terminator mov bx,offset dnethlp ; help message call comnd ; get the name mov temp,ax ; save number of chars entered mov ah,cmword ; get optional LAT service name mov dx,offset decbuf+80 ; work near end of this buffer mov word ptr decbuf+80,0 ; insert terminator mov bx,offset nethlp2 ; help message mov comand.cmblen,16 ; length of buffer (password = 16 chr) call comnd ; get the name, ignore if absent mov decbuf+79,al ; store byte count in name here mov comand.cmblen,0 ; length of buffer back to normal mov ah,cmeol call comnd ; get a confirm jnc comsd3 ret ; did not get a confirm comsd3: call serrst ; close serial port now cmp temp,0 ; any node name? je comsd8 ; e = no, assume preestablished cmp decbuf,'*' ; just show LAT names? jne comsd4 ; ne = no call far ptr chkdec ; see if network is available jc comsd3a ; c = no, no net available and nettype,not decnet ; remove CTERM indicator test nettype,declat ; LAT type present? jz comsd3a ; z = no call latlst ; show LAT names and nettype,not declat ; remove this indicator clc ; success but do not make connection ret comsd3a:cmp teslat,0 ; doing TES-LAT? je comsd3b ; e = no, DECnet mov teslat,0 ; not this method of TES jmp comstes1 ; try older TES method comsd3b:mov ah,prstr mov dx,offset nonetmsg ; say net is not available int dos clc ret ; put name in uppercase, strip '::' comsd4: mov si,offset decbuf ; the node name, make upper case mov cx,temp ; length of node name add si,cx ; and add '::' if absent push ds pop es cmp byte ptr [si-1],':' ; ended on colon? jne comsd5 ; ne = no dec cx ; remove it cmp byte ptr [si-2],':' ; first colon present? jne comsd5 ; e = yes dec cx ; remove it comsd5: mov si,offset decbuf ; uppercase and copy name mov di,offset latservice ; to this structure jcxz comsd7a ; z = empty name cld comsd6: lodsb ; si = new node name cmp al,'a' ; in lower case? jb comsd7 ; b = no cmp al,'z' ; in lower case? ja comsd7 ; a = no and al,not 20h ; convert to upper case comsd7: stosb loop comsd6 comsd7a:mov byte ptr [di],0 ; terminate latservice name mov si,offset decbuf+80 ; LAT password mov di,offset latpwd ; where it will reside mov byte ptr [di],0 ; clear password now call strcpy ; copy it, asciiz mov cl,decbuf+79 ; length of name xor ch,ch add di,cx ; point to trailer sub cx,16 ; max chars in password jle comsd8 ; le = filled now, or no password mov al,' ' ; make it space filled push ds pop es rep stosb ; fill in spaces comsd8: call far ptr chkdec ; see if network is available jc comsd3a ; c = no mov ah,prstr test nettype,decnet ; starting CTERM? jz comsd9a ; z = no mov dx,offset decmsg4 ; assume CTERM int dos comsd9a:test nettype,declat ; LAT too? jz comsd9b ; z = no cmp teslat,0 ; TES-LAT? jne comsd9b ; ne = yes, don't say LAT on screen mov dx,offset decmsg5 ; say LAT connection is ready int dos comsd9b:cmp pcnet,2 ; session active? jb comsd10 ; b = no, start a new one call chknew ; session exists, Resume or start new? jc comsd11 ; c = resume call decclose ; close current session comsd10:mov portval,offset port_dec ; set Network port data structure addr cmp teslat,0 ; TESLAT? jne comsd12 ; ne = yes mov flags.comflg,'D' ; set the comm port flag comsd11:clc ret ; end of DECnet comsd12:mov flags.comflg,'I' ; set the comm port flag clc ret ; end of TESLAT comsbapi:mov ah,bapihere ; 3Com BAPI presence check xor al,al mov bx,0aaaah ; undocumented magic int bapiint cmp ax,0af01h ; signature jne comsbap1 ; ne = not present call serrst ; close current port mov ah,bapieecm ; disable Enter Command Mode char xor al,al int bapiint mov portval,offset port_ub ; set Network port data structure address mov port_ub.portrdy,1 ; say the comms port is ready or nettype,bapi ; indentify network type mov flags.comflg,'C' ; set the comm port flag mov pcnet,2 ; network is present and active clc ; success ret comsbap1:mov ah,prstr mov dx,offset nonetmsg ; say no network int dos comsbap3:stc ; say failure ret ; end 3Com BAPI comse: mov dx,offset ebiostab ; table of EBIOS ports xor bx,bx mov ah,cmkey call comnd jnc comse1 ; nc = success ; failure is ok, fails for GETBAUD etc calling comstrt mov bx,ebport ; use current port inc bx ; here count from 1 comse1: push bx mov ah,cmword ; get a word (remote node name) mov dx,offset decbuf ; work buffer mov word ptr decbuf,0 ; insert terminator mov bx,offset ebhlp ; help message call comnd ; get the name mov ah,cmeol call comnd ; get a confirm pop bx jnc comse7 ret ; c = failure comse7: dec bx ; count from 0 mov ebport,bx ; port number 0..3 call chkebios ; EBIOS presence check jnc comse7a ; nc = success mov inettyp,'E' ; try NetBios directly (ABIOS) mov al,decbuf ; indicator of new host name mov newnambuf,al ; set for NetBios routine or nettype,acsi ; say doing special subset of NetBios jmp comsn3 ; setup NetBios connection comse7a:push es mov bx,ds mov es,bx mov bx,offset ebcoms ; es:bx to ebcoms address mov dx,ebport ; port number mov cx,51 ; number of bytes in ebcoms mov ah,ebquery ; get redirection table info int rs232 mov ebcoms,0 ; query puts ebport in LANA, clear it cmp decbuf,0 ; any new name given? je comse4 ; e = no, presume name exists in EBIOS mov si,offset decbuf ; user input mov di,offset ebcoms+2 ; where to store it mov cx,16 ; 16 char NetBios name cld comse2: lodsb ; get a new char or al,al ; null terminator? jnz comse3 ; nz = no, use it mov al,' ' ; replace with space rep stosb ; do remaining spots jmp short comse3b ; carry on when done comse3: stosb ; store it loop comse2 comse3b:call setnbname ; setup local Netbios name jc comse4 ; c = failed mov si,ds mov es,si cld mov ebcoms+2+16,0 ; no Listen required, just a Call mov cx,8 mov si,offset deflname ; our Netbios name mov di,offset ebcoms+2+16+16 rep movsw comse4: mov bx,offset ebcoms ; es:bx to ebcoms structure mov ebcoms+1,80h ; force a network connection mov ah,ebredir ; do redirection xor al,al mov dx,ebport int rs232 pop es or ax,ax ; status jz comse5 ; z is success push ax mov ah,prstr mov dx,offset ebmsg3 ; cannot open network int dos pop ax xchg ah,al xor ah,ah call decout ; show error value stc ret comse5: cmp ebcoms+2,' ' ; do we have a name? ja comse6 ; a = yes mov ah,prstr mov dx,offset ebmsg2 ; say bad command int dos stc ; fail ret comse6: call serrst ; reset previous port mov bx,offset portb1 ; use Bios data structure mov ax,type prtinfo ; portinfo item size mov cx,ebport ; actual port (0..3) mul cl ; times port add bx,ax ; new portb offset mov portval,bx mov [bx].portrdy,1 ; say the comms port is ready mov [bx].sndproc,offset ebisnd ; send processor mov [bx].rcvproc,offset ebircv ; receive processor mov [bx].cloproc,offset ebiclose ; close processor or nettype,ebios ; indentify network type mov flags.comflg,'E' ; say EBIOS mov pcnet,1 clc ; success ret comsex: mov dx,offset nonetmsg ; say network is not available mov ah,prstr int dos comsex1:stc ; failure ret comstelapi: ; Novell TELAPI mov ah,cmword ; get a word (remote node name) mov dx,offset decbuf ; work buffer mov word ptr decbuf,0 ; insert terminator mov bx,offset telhlp ; help message call comnd ; get the name mov ah,cmeol call comnd ; get a confirm jnc comstel1 ; nc = ok so far ret ; did not get a confirm comstel1:cmp decbuf,0 ; got new address? jne comstel2 ; ne = yes cmp word ptr internet,0 ; have we a previous address? jne comstel6 ; ne = yes, use it instead jmp short comstel5 ; no address, say illegal comstel2:cmp portin,0 ; inited port yet? jl comstel8 ; l = no test nettype,telapi ; already doing TELAPI? jz comstel7 ; z = no call chknew ; ask Resume or New jc comstel6 ; c = Resume comstel7:call telapiclose ; close that connection comstel8:xor bx,bx ; convert Internet address to binary xor dx,dx ; Internet field in dl, as a temp mov word ptr internet,dx ; clear Internet address mov word ptr internet+2,dx mov si,offset decbuf ; fresh text cld comstel3:lodsb ; get ascii digit cmp al,'.' ; separator? jne comstel4 ; ne = no inc bx ; next field cmp bx,3 ; beyond last field ja comstel5 ; a = yes, error jmp short comstel3 comstel4:or al,al ; end of information? jz comstel6 ; z = yes sub al,'0' ; strip ascii bias cmp al,9 ; in digits? ja comstel5 ; a = no mov dl,internet[bx] ; current field xor dh,dh shl dx,1 ; times two push dx ; save shl dx,1 ; times four shl dx,1 ; times eight pop cx ; recover times two add dx,cx ; plus two = times ten add al,dl ; plus current digit mov internet[bx],al ; save value jmp short comstel3 ; next character comstel5:mov ah,prstr ; say bad address construction mov dx,offset telmsg1 int dos mov dx,offset decbuf ; show address call prtasz stc ret comstel6:call serrst ; end previous async session mov portval,offset port_ub ; set Network port data structure addr or nettype,telapi ; indentify network type mov flags.comflg,'T' ; set the comm port flag clc ret comstes1:mov cx,0ffffh ; old TES presence check mov ah,tesinstal ; installation/status check call tes_service jc comstes2 ; c = error of some kind cmp ax,'TE' ; signature jne comstes2 ; ne = not present cmp cx,0ffffh ; should change too jne comstes3 ; ne = present comstes2:mov ah,prstr mov dx,offset nonetmsg ; say no network int dos stc ; say failure ret comstes3:mov tesport,dx ; remember TES intercepted port call serrst ; close current port mov portval,offset port_tes ; set Network port data structure addr or nettype,tes ; indentify network type mov flags.comflg,'I' ; set the comm port flag mov teslat,0 ; not LAT kind cmp decbuf,'*' ; was show-all entered? jne comstes4 ; ne = no jmp teshosts ; show known TES hosts comstes4:mov ax,temp ; length of entered name or al,tesname ; plus preexisting name, if any or ax,ax ; anything present? jz comstes9 ; z = no name, find existing session cmp decbuf,0 ; anything to copy? je comstes5 ; e = no, use existing name call tesclose ; close existing connection or nettype,tes ; indentify network type mov si,offset decbuf mov di,offset tesname call strcpy ; copy node name comstes5:clc ret comstes9:mov tesses,1 ; search for an active/held session comstes10:call tesstate ; get state of that session to AH test ah,2 ; active? jnz comstes12 ; nz = yes, use it inc tesses ; next session cmp tesses,9 ; done all? jbe comstes10 ; be = no mov tesses,1 ; try for a held session comstes11:call tesstate ; get state of that session to AH test ah,1 ; on hold? jnz comstes12 ; nz = yes, use it inc tesses ; next session cmp tesses,9 ; done all? jbe comstes11 ; be = no mov tesses,0 ; say no session mov ah,prstr mov dx,offset tesnhost ; give directions int dos call teshosts ; show known hosts comstes12:ret ; TCP/IP Telnet comstn: mov ah,cmword ; get a word (remote node name) mov comand.cmblen,60 ; set 60 byte limit plus null mov dx,offset decbuf+1 ; work buffer, 1st byte = count mov word ptr decbuf,0 ; insert terminator mov decbuf+80,0 ; byte count of args mov bx,offset tcphlp ; help message call comnd ; get the name jc comstnx or al,al ; anything? jz comstn1 ; z = no mov decbuf,al ; store byte count mov ah,cmword ; get optional Port number mov comand.cmblen,7 ; set 7 byte limit plus null mov dx,offset decbuf+82 ; far from real node names mov decbuf+80,0 ; byte count of args mov decbuf+81,'\' ; \number prefix, just in case mov word ptr decbuf+82,0 ; clear entry mov bx,offset tcpporthlp call comnd jc comstnx mov decbuf+80,al ; store arg byte count comstn1:mov ah,cmeol call comnd ; get a confirm jnc comstn2 ; nc = ok so far comstnx:ret ; did not get a confirm comstn2:call serrst ; close current comms port mov portin,0 mov flags.comflg,'t' ; what we want, may not have yet call sesmgr ; SESSION MANAGER jnc comstn3 ; nc = start a new session ret ; resume existing session comstn3:mov si,offset decbuf+82 ; optional port number cmp byte ptr [si-2],0 ; byte count, any port specified? je comstn5 ; e = no, use default cmp byte ptr [si],'\' ; user specified leading backslash? je comstn4 ; e = yes dec si ; then use ours comstn4:call katoi ; convert si to number in ax or ax,ax ; any port specified jz comstn5 ; z = no, use 23 cmp ax,25 ; this one? jne comstn6 ; ne = no mov ah,prstr mov dx,offset badport ; say bad port number int dos comstn5:mov ax,23 ; use official Telnet port comstn6:mov bx,tcpdata+16 ; holds offset of tcpport mov [bx],ax ; copy new port mov portval,offset port_tn ; set Network port data structure addr mov nsbrk,1 ; network BREAK supported clc ret ; Beame & Whiteside TCP/IP comsbw: mov ah,cmword ; get a word (remote node name) mov dx,offset decbuf ; work buffer mov word ptr decbuf,0 ; insert terminator mov bx,offset telhlp ; help message call comnd ; get the name mov ah,cmeol call comnd ; get a confirm jnc comsbw1 ; nc = ok so far ret ; did not get a confirm comsbw1:cmp decbuf,0 ; got new address? jne comsbw2 ; ne = yes cmp word ptr internet,0 ; have we a previous address? je comsbw5 ; e = no address, say illegal jmp comsbw6 comsbw2:cmp portin,0 ; inited port yet? jl comsbw8 ; l = no test nettype,bwtcp ; [JRS] already doing BWTCP? jz comsbw7 ; [JRS] z = no call chknew ; ask Resume or New jnc comsbw7 ; nc = New jmp comsbw6 comsbw7:call bwclose ; close current connection comsbw8:xor bx,bx ; convert Internet address to binary xor dx,dx ; Internet field in dx, as a temp mov word ptr internet,dx ; clear Internet address mov word ptr internet+2,dx mov si,offset decbuf ; fresh text cld cmp byte ptr [si],'*' ; [JRS] telnet server mode? jnz comsbw3 ; [JRS] nz = no, process IP address mov word ptr internet,-1 ; [JRS] bogus IP for server mode mov word ptr internet+2,-1 ; [JRS] bogus IP for server mode comsbw6:call serrst ; end previous async session push bx mov bx,offset port_tn mov portval,bx mov [bx].sndproc,offset bwsend ; [JRS] BW send routine mov [bx].rcvproc,offset bwrecv ; [JRS] BW Receive routine mov [bx].cloproc,offset bwclose ; [JRS] BW Close routine pop bx or nettype,bwtcp ; [JRS] set it to BW-TCP mov flags.comflg,'b' ; [JRS] set the comm port flag clc ret comsbw3:lodsb ; get ascii digit cmp al,'.' ; separator? jne comsbw4 ; ne = no inc bx ; next field cmp bx,3 ; beyond last field ja comsbw5 ; a = yes, error jmp short comsbw3 comsbw4:or al,al ; end of information? jz comsbw6 ; z = yes sub al,'0' ; strip ascii bias cmp al,9 ; in digits? ja comsbw5 ; a = no mov dl,internet[bx] ; current field xor dh,dh shl dx,1 ; times two push dx ; save shl dx,1 ; times four shl dx,1 ; times eight pop cx ; recover times two add dx,cx ; plus two = times ten add al,dl ; plus current digit mov internet[bx],al ; save value jmp short comsbw3 ; next character comsbw5:mov ah,prstr ; say bad address construction mov dx,offset telmsg1 int dos mov dx,offset decbuf ; show address call prtasz stc ret COMS ENDP teshosts proc near ; TES, show list of hosts mov ah,prstr mov dx,offset tesnlist ; show list of hosts int dos push es push si mov ah,tesgets ; get TES known servers call tes_service ; cx gets qty mov dx,offset decbuf ; work buffer mov word ptr decbuf,' ' ; item spacing xor di,di ; line length counter or cx,cx ; any servers? jnz teshost1 ; nz = some servers inc cx ; say one for loop push cx mov word ptr decbuf+2,'ON' ; prefill with NONE mov word ptr decbuf+4,'EN' mov decbuf+6,0 ; asciiz mov cx,6 ; length of " NONE" jmp short teshost3 ; show NONE teshost1:push cx ; count of servers push si ; save master list pointer push di mov si,es:[si] ; get offset of first name mov di,dx ; decbuf add di,2 ; move into decbuf+2 teshost2:mov al,es:[si] ; get name char inc si mov [di],al ; store name char inc di or al,al ; at end? jnz teshost2 ; nz = no pop di pop si ; master list of offsets add si,2 ; next item in list call strlen ; get length of name w/spaces add di,cx ; length of display line with name cmp di,60 ; time to break line? jbe teshost3 ; be = no push dx mov ah,prstr ; break the screen line mov dx,offset crlf int dos pop dx xor di,di ; say line is empty teshost3:add di,cx ; current line length call prtasz ; show asciiz text at ds:dx pop cx loop teshost1 ; do all entries pop si pop es ret teshosts endp ; Perform TES function given in AH, but tell cmd interpreter to not prompt. tes_service proc near push ax push si push es mov ax,ds mov es,ax mov si,offset tesquiet ; cmd to say no prompting xor al,al ; no visible response please mov ah,tesexec int rs232 pop es pop si pop ax push ds ; prevent corruption by TES int rs232 ; do the main request pop ds ret tes_service endp ; TES - start or resume a TES connection tesstrt proc near cmp tesses,0 ; session yet? jne tesstr2 ; ne = yes cmp tesname,0 ; have a node name? jne tesstr1 ; ne = yes jmp tesstr4 ; find an existing connection, if any tesstr1:push si mov si,offset tesname ; node name mov ah,tesnews ; make a new session call tes_service pop si jmp short tesstr4 ; double check on transistions ; have a session, live or held tesstr2:call tesstate ; get session status test ah,2 ; active or being made so? jnz tesstr3 ; nz = yes, connect to it test ah,1 ; session on hold or being made so? jz tesstr1 ; z = no, make a new one mov ah,tesresume ; resume a session mov al,tesses ; the session number call tes_service shl ah,1 ; get status into carry bit jc tesstr4 ; c = problem, try to recover tesstr3:cmp tesname,0 ; have name yet? je tesstr4 ; e = no, get it now mov pcnet,2 ; have an active session mov port_tes.portrdy,1 ; say port is ready clc ret tesstr4:push si ; find an active session number push es mov temp,0 ; retry counter mov tesses,1 ; session number tesstr5:mov ah,teslist ; get TES session pointers call tes_service ; CX gets quantity of ACTIVE sessions tesstr6:mov al,es:[si] ; get session status cmp al,82h ; making a session now? je tesstr7 ; e = yes, good enough test al,80h ; in transitional status? jz tesstr6b ; z = no mov ah,100 call pcwait ; wait 100 ms inc temp cmp temp,10 ja tesstr6a ; a = too many retries, quit jmp short tesstr5 ; nz = yes, go around again tesstr6b:mov temp,0 ; clear retry counter test al,2 ; 0=inactive, 1=on hold, 2=active? jnz tesstr7 ; nz = active add si,3 ; skip status byte, name offset inc tesses ; bump session number cmp tesses,9 ; done all? jbe tesstr6 ; be = no tesstr6a:mov tesses,0 ; no active session mov port_tes.portrdy,0 ; say the comms port is not ready mov pcnet,1 ; network is present and inactive stc ; signal failure jmp short tesstr8 ; set port ready, get host name tesstr7:mov port_tes.portrdy,1 ; say the comms port is ready mov pcnet,2 ; network is present and active mov di,offset tesname ; readback asciiz name mov byte ptr [di],0 ; clear the name field mov si,es:[si+1] ; get name ptr offset or si,si ; check for null pointer jz tesstr6a ; z = no name, dead session mov cx,49 ; limit to 48 chars plus null tesstr7a:mov al,es:[si] ; get a char inc si mov [di],al ; store inc di or al,al ; null? jz tesstr7b ; z = yes, stop here loop tesstr7a ; keep going tesstr7b:clc ; signal success tesstr8:pop es pop si ret tesstrt endp ; TES. Return session status in AH for session in tesses. Destroys AX tesstate proc near push cx push si push es mov ah,teslist ; get session list call tes_service mov ah,0ffh ; set up no session status mov al,tesses ; our session number, 1..9 dec al ; base on zero here mov ah,al shl ah,1 add al,ah xor ah,ah ; times three add si,ax ; point to session structure es:[si] mov ah,es:[si] ; get session status byte testat1:pop es pop si pop cx ret tesstate endp ; Start Novell TELAPI session. Internet address is already binary telstrt proc near mov dx,word ptr internet ; internet address, high part mov cx,word ptr internet+2 mov bx,telport ; Telnet port (23 decimal) push es push si xor si,si ; use TELAPI data structures, not ours mov es,si ; es:si = Telnet state record, theirs mov di,offset telhostid ; two byte host identifier in ds:di mov ah,telopen ; open the connection int rs232 mov telses,ax ; save TELAPI session number pop si pop es or ax,ax ; get status returned in AX jns telstr1 ; ns = success cmp ax,telinuse ; socket is already connected? (-56) jne telstr2 ; ne = no, else attach to it telstr1:mov port_ub.portrdy,1 ; say the comms port is ready mov pcnet,2 ; network is present and active or nettype,telapi clc ret ; failure message display section telstr2:mov dx,offset telmsg51 ; network unreachable cmp ax,telunreac ; correct? je telstr3 ; e = yes mov dx,offset telmsg56 ; socket in use cmp ax,telinuse je telstr3 mov dx,offset telmsg60 ; timeout on connection attempt cmp ax,teltmo je telstr3 mov dx,offset telmsg61 ; connection refused cmp ax,telrefuse je telstr3 mov dx,offset telmsg64 ; host is down cmp ax,teldwnhost je telstr3 mov dx,offset telmsg67 ; unknown host cmp ax,telunkhost je telstr3 mov dx,offset telmsg301 ; no more space cmp ax,telfull je telstr3 push ax ; unknown error, show error value mov dx,offset telmsg2 mov ah,prstr int dos pop ax neg ax ; make positive number again call decout ; show error value, for now jmp short telstr4 telstr3:mov ah,prstr int dos ; show reason msg telstr4:mov ax,3000 ; show for three seconds call pcwait mov port_ub.portrdy,0 ; say port is not ready stc ; fail ret telstrt endp ; Start Beame & Whiteside TCP connecton. IP address is already binary [JRS] bwstart proc near ; [JRS] push bx ; [JRS] push cx ; [JRS] push dx ; [JRS] mov bx,bwhandle ; [JRS] check the file handle or bx,bx ; [JRS] non-zero is open jnz bwstrt1 ; [JRS] nz = yes, just continue mov ax,3d42h ; [JRS] open file shared read/write mov dx,offset bwtcpnam ; [JRS] "TCP-IP10" int dos jc bwstrt2 ; c = failed mov bwhandle,ax ; [JRS] save file handle mov bx,ax ; [JRS] copy handle mov ax,4401h ; [JRS] io/ctl - set dev info xor cx,cx ; [JRS] mov dx,60h ; [JRS] data is raw int dos ; [JRS] jc bwstrt2 ; c = failed mov xmtbuf,0 ; [JRS] set up port bind address push es mov ax,40h ; Bios work area mov es,ax mov ax,es:[6ch] ; low word of Bios tod tics pop es mov word ptr xmtbuf+1,ax ; local port mov ax,4403h ; [JRS] write to device mov bx,bwhandle ; [JRS] device handle mov cx,3 ; [JRS] length of data mov dx,offset xmtbuf ; [JRS] data buffer int dos ; [JRS] jc bwstrt2 ; c = failed mov xmtbuf,1 ; [JRS] set up IP bind address mov dx,word ptr internet ; [JRS] internet address, high part mov cx,word ptr internet+2 ; [JRS] cmp dx,-1 ; [JRS] check for server addr -1 jz bwaccept ; [JRS] z = -1, do accept processing mov word ptr xmtbuf+1,dx ; [JRS] store address in buffer mov word ptr xmtbuf+3,cx ; [JRS] mov xmtbuf+5,23 ; [JRS] telnet port (23) mov xmtbuf+6,0 ; [JRS] high byte mov ax,4403h ; [JRS] write to device mov bx,bwhandle ; [JRS] mov cx,7 ; [JRS] mov dx,offset xmtbuf ; [JRS] int dos ; [JRS] jc bwstrt2 ; c = failed bwstrt0:mov xmtbuf,6 ; [JRS] set up for no read blocking mov xmtbuf+1,1 ; [JRS] control string is \6\1 mov ax,4403h ; [JRS] write to device mov bx,bwhandle ; [JRS] mov cx,2 ; [JRS] mov dx,offset xmtbuf ; [JRS] int dos ; [JRS] jc bwstrt2 ; c = failed bwstrt1:pop dx ; [JRS] restore registers pop cx ; [JRS] pop bx ; [JRS] mov port_tn.portrdy,1 ; [JRS] say the comms port is ready mov pcnet,2 ; [JRS] network is present and active or nettype,bwtcp ; [JRS] mov optstate,0 ; init Options mov sgaflg,0 ; assume supresss go aheads in effect mov option2,TELOPT_SGA mov ah,DO call bwsendiac ; say do supress go aheads clc ret bwstrt2:call bwclose ; [JRS] failure, close "file" pop dx ; [JRS] pop cx ; [JRS] pop bx ; [JRS] stc ; c = failed ret bwaccept:mov xmtbuf,2 ; [JRS] set port to accept calls mov ax,4403h ; [JRS] write to device mov bx,bwhandle ; [JRS] mov cx,1 ; [JRS] mov dx,offset xmtbuf ; [JRS] int dos ; [JRS] mov ax,4402h ; [JRS] read from device mov bx,bwhandle ; [JRS] device handle mov cx,11 ; [JRS] buffer length mov dx,offset xmtbuf ; [JRS] buffer int dos ; [JRS] bwacpt1:cmp xmtbuf,4 ; [JRS] check response 0 < xmtbuf < 4 jge bwacpt2 ; [JRS] complete cmp xmtbuf,0 ; [JRS] je bwacpt2 ; [JRS] ; [JRS] waiting for a connection mov ax,4402h ; [JRS] read from device mov bx,bwhandle ; [JRS] mov cx,11 ; [JRS] mov dx,offset xmtbuf ; [JRS] int dos ; [JRS] jmp short bwacpt1 ; [JRS] got look at response bwacpt2:cmp xmtbuf,0 ; [JRS] check for response of zero je bwstrt2 ; [JRS] e=yes, fail jmp bwstrt0 ; [JRS] success, we have a call bwstart endp ; [JRS] code ends code1 segment assume cs:code1 ; Check for presence of DECNET. Host name is in latservice. ; Try LAT then try CTERM. Sets nettype for kind found. ; Return carry clear if success, or carry set if failure. chkdec proc FAR cmp pcnet,2 ; net active now? jb chkde2 ; b = no cmp lathand,0 ; valid LAT handle? jne chkde1 ; ne = yes cmp decneth,0 ; valid LAT handle? je chkde2 ; e = invalid handle chkde1: clc ret ; return to active session chkde2: push es and nettype,not (declat+decnet) ; clear network type bits cmp teslat,0 ; TESLAT? jne chkde2a ; ne = yes mov latversion,2 ; assume version 2 mov ah,35h ; get interrupt vector mov al,6eh ; DNP sockets interrupt 6Eh int dos cmp word ptr es:[bx-3],'ND' ; look for "DNP" signature jne chkde4 ; ne = uh oh, something is wrong mov al,es:[bx-5] ; major version number mov latversion,al ; save as LAT version too chkde2a:call chklat ; check for LAT jc chkde3 ; c = not present mov latversion,2 ; Force this since v4 is broken cmp teslat,0 ; TESLAT? je chkde3 ; e = no mov latversion,3 ; version 3 for TESLAT jmp short chkde4 ; now do CTERM too chkde3: mov al,decint ; CTERM interrupt 69h mov ah,35h ; get vector to es:bx int dos mov ax,es or ax,ax ; undefined interrupt? jz chkde4 ; z = yes cmp byte ptr es:[bx],0cfh ; points at IRET? je chkde4 ; e = yes mov ax,dpresent ; CTERM installation call int decint cmp al,0ffh ; CTERM installed? jne chkde4 ; ne = no or nettype,decnet ; kind of network is CTERM chkde4: pop es test nettype,declat+decnet ; any DEC network found? jz chkde5 ; z = no clc ; clear means yes ret chkde5: stc ; status is no net ret chkdec endp ; Check for LAT interrupt vector, return carry clear if found else carry set. chklat proc near push es mov al,latint ; LAT interrupt 6Ah mov ah,35h ; get vector to es:bx int dos mov ax,es or ax,ax ; undefined interrupt? jz chklat1 ; z = yes cmp byte ptr es:[bx],0cfh ; points at IRET? je chklat1 ; e = yes, not installed cmp word ptr es:[bx-3],'AL' ; preceeding 3 bytes spell 'LAT'? jne chklat1 ; ne = no, so no LAT, try CTERM cmp byte ptr es:[bx-1],'T' jne chklat1 ; ne = no, fail or nettype,declat ; kind of network is LAT pop es clc ; success ret chklat1:pop es stc ; say failure ret chklat endp ; Start DECNET link. Host name is in latservice, nettype has LAT or CTERM ; kind bits. Return carry clear if success, or carry set if failure. decstrt proc FAR cmp pcnet,2 ; net active now? jb decst2 ; b = no cmp lathand,0 ; invalid LAT handle? jne decst1 ; ne = no, have a connection cmp decneth,0 ; invalid CTERM handle? je decst2 ; e = yes, start the net decst1: mov port_dec.portrdy,1 ; say the comms port is ready cmp teslat,0 ; TES-LAT? je decst1a ; e = no mov flags.comflg,'I' ; TES-LAT clc ret decst1a:mov flags.comflg,'D' ; set the comm port flag clc ret ; return to active session decst2: push es ; used a lot here call chkdec ; get net type jnc decst3 ; nc = have a CTERM or LAT kind jmp decst16 ; c = net not found decst3: cmp latservice,0 ; node name present? jne decst4 ; ne = yes mov ah,prstr mov dx,offset noname ; say host name is required int dos pop es stc ; fail ret decst4: test nettype,declat ; LAT is available? jnz decst6 ; nz = yes jmp decst13 ; z = no, try CTERM decst6: cmp word ptr latscbptr+2,0 ; any segment allocated now? jne decst8 ; ne = yes, do not malloc one here ; cmp tv_mode,0 ; running under Windows or DV? ; je decst6a ; e = no, ok to try local SCB ; jmp decst12b ; can't use local so no LAT today decst6a:mov bx,870+15 ; size of LAT SCB, bytes, rounded up mov cl,4 shr bx,cl ; bytes to paragraphs mov temp,bx ; save requested paragraphs mov ah,alloc ; allocate memory, ax gets segment int dos ; bx gets # paragraphs allocated jnc decst7 ; nc = success jmp decst13 ; fail, go try CTERM decst7: mov latseg,ax mov word ptr latscbptr+2,ax ; remember seg of SCB mov word ptr latscbptr+10,ax ; and on the "To:" side as well mov es,ax xor di,di ; es:di is destination xor ax,ax ; get word of zeros mov word ptr latscbptr+0,ax ; remember offset (0) of SCB mov word ptr latscbptr+8,ax ; as above mov cx,bx ; paragraphs obtained shl cx,1 shl cx,1 shl cx,1 ; words cld rep stosw ; clear the SCB cmp temp,bx ; wanted vs allocated (bx) paragraphs jbe decst5 ; be = enough, setup structure jmp decst12 ; deallocate memory and try CTERM decst5: and nettype,not declat ; presume failure cmp latversion,4 ; version 4? jb decst8 ; b = no, earlier, do our own SCB mov ax,latscbget ; get LAT interior SCB addr to es:bx mov dh,0ffh int latint or ah,ah ; success? jnz decst8 ; nz = no mov ax,es mov word ptr latscbptr+6,ax ; address of SCB within LAT mov word ptr latscbptr+4,bx ; seg part call decfems ; copy EMS SCB to local SCB jmp short decst9 ; fill in local info decst8: les bx,latscbptr ; allocate data buffers locally mov es:[bx].slottbl,slotbf1 ; offset of first buffer mov es:[bx].slottbl+2,slotbf2 ; offset of second buffer mov es:[bx].slotqty,2 ; say two buffers decst9: les di,latscbptr ; set es:di to local scb mov si,offset latservice ; get host name mov cx,17 ; 17 bytes cld rep movsb ; insert host name mov ax,latopen ; open a LAT session mov di,offset latpwd ; es:di optional asciiz LAT password cmp byte ptr [di],0 ; any name entered? je decst10 ; e = no and al,0fh ; open as AX = 0d0fh if with password decst10:mov bx,word ptr latscbptr ; open needs es:bx == SCB cmp latversion,4 ; LAT version 4? jb decst11 ; b = no, use version 2 mov al,1 ; v4 form push ax mov cx,ds mov word ptr es:[bx].lat_pwd+2,cx ; set the pointer segment mov word ptr es:[bx].lat_pwd,di ; address of the password buffer mov dx,di call fstrlen ; password string length to cx mov es:[bx].pwd_len,cl ; length of the password or cx,cx ; is there a password? jnz decst10a ; nz = yes mov word ptr es:[bx].lat_pwd,cx ; no, clear fields mov word ptr es:[bx].lat_pwd+2,cx mov byte ptr es:[bx].pwd_len,cl decst10a:call dec2ems ; copy local SCB to one in EMS pop ax decst11:mov dh,0ffh int latint or ah,ah ; status byte jnz decst12 ; nz = failure, clean up, try CTERM mov dh,0ffh mov lathand,dx ; handle returned in dl, 0ffh in dh or nettype,declat ; say LAT session is active jmp decst17 ; finish startup info ; LAT startup failure decst12:mov ax,latseg ; stored segment of memory block or ax,ax ; did we use it? jz decst12a ; z = no mov es,ax ; allocated segment, unneed now mov ah,freemem ; free it again int dos jmp short decst12b ; clear pointers decst12a:cmp word ptr latscbptr+2,0 ; in use as LAT internal perhaps? je decst12b ; e = no les bx,latscbptr mov ax,latscbfree ; free SCB internal to LAT int latint decst12b:xor ax,ax mov latseg,ax ; say not used mov lathand,ax ; invalidate the handle mov word ptr latscbptr+0,ax ; clear SCB pointer mov word ptr latscbptr+2,ax and nettype,not declat ; fall through to try CTERM decst13:test nettype,decnet ; is CTERM available? jz decst16 ; z = no and nettype,not decnet ; presume failure mov ax,decseg ; scb memory segment, if non-zero or ax,ax ; allocated already? jnz decst14 ; nz = yes, segment is in ax mov ax,dgetscb ; get CTERM SCB size int decint add ax,15 ; round up byte count mov cl,4 shr ax,cl ; bytes to paragraphs mov bx,ax mov temp,ax ; save requested paragraphs mov ah,alloc ; allocate memory int dos ; bx gets # paragraphs allocated jc decst16 ; c = failure mov decseg,ax ; store address of memory block cmp temp,bx ; wanted vs allocated paragraphs jb decst15 ; b = not enough, fail decst14:mov bx,offset latservice ; ds:bx = node name mov es,ax ; ax holds scb segment xor dx,dx ; es:dx = SCB address mov ax,dopen ; open session int decint cmp ax,0 ; > 0 means session handle, else error jle decst15 ; le = error mov decneth,ax ; store handle or nettype,decnet ; network type is DECnet jmp short decst17 ; success ; CTERM startup failure decst15:push ax ; save error number in ax mov ax,decseg ; allocated memory segment mov es,ax mov ah,freemem ; free allocated memory segment @ES int dos ; free the block mov decseg,0 ; clear remembered segment address mov ah,prstr mov dx,offset decmsg1 ; cannot create session int dos mov dx,offset decmsg3 ; DEC Error # int dos pop ax ; recover error number (negative) neg ax call fdecout ; error number mov decneth,0 ; invalidate the handle and nettype,not decnet decst16:mov pcnet,0 ; no net mov port_dec.portrdy,0 ; port is not ready pop es stc ; status is error ret ; LAT or CTERM success decst17:mov pcnet,2 ; say net is present and active cmp teslat,0 ; TES-LAT? je decst18 ; e = no mov flags.comflg,'I' ; TES-LAT jmp short decst19 decst18:mov flags.comflg,'D' ; set the comm port flag decst19:mov port_dec.portrdy,1 ; say the comms port is ready mov ax,100 ; wait 100 ms for DECnet to get ready call fpcwait ; FAR call pop es clc ret decstrt endp ; Copy LAT scb from local SCB to one in EMS dec2ems proc near cmp latversion,4 ; version 4? jb dec2emsx ; b = no, earlier, do our own SCB push ax push bx push cx push dx push es mov ax,ds ; seg where latscbptr is located mov es,ax ; to es:bx mov bx,offset latscbptr mov ax,latcpyems ; copy from local to EMS mov dh,0ffh ; signature mov cx,870 ; size of LAT structure int latint ; copy local LAT info to EMS version pop es pop dx pop cx pop bx pop ax dec2emsx:ret dec2ems endp ; Copy LAT SCB from EMS to local SCB decfems proc near cmp latversion,4 ; version 4? jb decfemsx ; b = no, earlier, do our own SCB push ax push bx push cx push dx push es mov ax,ds ; seg where latscbptr is located mov es,ax ; to es:bx mov bx,offset latscbptr+4 ;local(0),LAT(4),local(8) in latscbptr mov ax,latcpyems ; copy from EMS to local mov dh,0ffh ; signature mov cx,870 ; size of LAT structure int latint pop es pop dx pop cx pop bx pop ax decfemsx:ret decfems endp code1 ends code segment assume cs:code ; Display list of LAT service names. Presumes LAT presence checks have passed latlst proc near push es push bx mov ah,prstr mov dx,offset dnetsrv ; header int dos push ds pop es mov si,2 ; chars in line counter latlst1:mov bx,offset decbuf+2 ; es:bx = temp buffer for a name mov word ptr [bx-2],' ' ; indent mov byte ptr [bx],0 ; and a null terminator mov ax,latsrv ; get next LAT service name mov dh,0ffh int latint or ah,ah ; check status jnz latlst2 ; nz = done (no more names) mov dx,offset decbuf ; name ptr is in es:bx (our buffer) call prtasz ; show asciiz name call strlen ; get current length add si,cx ; count chars on this line cmp si,60 ; enough on line already? jbe latlst1 ; be = no mov ah,prstr ; break the screen line mov dx,offset crlf int dos mov si,2 ; reset line count jmp short latlst1 ; do it again latlst2:pop bx pop es ret latlst endp ; Check which Interrupt ReQuest line the port uses. Technique: allow interrupt ; on transmitter holding register empty, test for that condition first with ; IRQ 4 and then IRQ 3. Returns with IRQ values set and carry clear if success ; or carry set if failure. [jrd] chkint proc near call serrst mov bl,flags.comflg ; port 1..4 dec bl xor bh,bh mov al,portirq[bx] ; pre-specified IRQ, if any or al,al ; IRQ specified already? jnz chkint20 ; nz = yes chkint10:test flags.comflg,1 ; COM1/3? jz chkint13 ; z = no, COM2/4 cmp flags.comflg,1 ; COM1? je chkint10a ; e = yes, try IRQ 4 cmp isps2,0 ; IBM PS/2 Model 50 or above? jne chkint11 ; ne = yes, other COM2..4 try IRQ 3 chkint10a:call chkint5 ; test for IRQ 4 jc chkint11 ; c = failed ret chkint11:call chkint6 ; else try IRQ 3 jnc chkint12 ; nc = success jmp chkint7 ; fall back on defaults chkint12:ret ; carry clear for success chkint13:call chkint6 ; test for IRQ 3 jc chkint14 ; c = failed ret chkint14:call chkint5 ; else try IRQ 4 jnc chkint15 ; nc = success jmp chkint7 ; fall back on defaults chkint15:ret ; carry clear for success ; IRQ specified, in AL chkint20:mov di,sp ; do push sp test for XT vs 286 class push sp ; XT pushes sp-2, 286's push old sp pop cx ; recover pushed value, clean stack sub di,cx ; non-zero if < 80286, no slave 8259 cmp al,2 ; using IRQ 2? jne chkint1 ; ne = no or di,di ; cascaded 8259? jnz chkint1 ; nz = no add al,7 ; map IRQ 2 to IRQ 9 chkint1:cmp al,15 ; larger than legal IRQ? ja chkint2 ; a = yes, fail or di,di ; 286 or above (cascaded 8259)? jz chkint3 ; z = yes cmp al,7 ; larger than legal for single 8259? jbe chkint3 ; be = no chkint2:stc ; fail ret chkint3:mov cl,al ; IRQ 0..15 mov bx,1 shl bx,cl ; bit position of IRQ 0..15 or bl,bh ; copy bit to bl mov modem.mddis,bl ; mask to disable IRQ not bl ; 0 means enable mov modem.mden,bl ; mask to enable IRQ and al,7 ; IRQ, lower three bits mov ah,al ; make a copy add ah,60h ; specific EOI control code mov modem.mdmeoi,ah ; specific EOI control command add al,8 ; IRQ 0 starts at Int 8 xor ah,ah mov modem.mdintv,ax ; Interrupt number mov modem.mdmintc,20h ; master 8259 control address or bh,bh ; on cascaded 8259? jz chkint4 ; z = no or modem.mdmintc,80h ; slave 8259 control address (0a0h) add modem.mdintv,70h-8 ; Interrupt number for IRQ 8..15 chkint4:clc ret ; find IRQ 4 by usage test chkint5:mov modem.mddis,(1 shl 4) ; IRQ 4 test. mask to disable IRQ 4 mov modem.mden,not (1 shl 4); mask to enable IRQ 4 mov modem.mdmeoi,20h ; use general in case we guess wrong mov modem.mdintv,8+4 ; IRQ 4 interrupt vector (0ch) mov modem.mdmintc,20h ; use master 8259 here call inttest jc chkint5a ; c = failed mov modem.mdmeoi,60h+4 ; use specific EOI for IRQ4 level mov bl,flags.comflg ; port 1..4 dec bl xor bh,bh mov portirq[bx],4 clc ; this setup worked chkint5a:ret ; IRQ 3 test chkint6:mov modem.mddis,(1 shl 3) ; mask to disable IRQ 3 mov modem.mden,not (1 shl 3); mask to enable IRQ 3 mov modem.mdmeoi,20h ; use general in case we guess wrong mov modem.mdintv,8+3 ; IRQ 3 interrupt vector call inttest jc chkint6a ; c = failed mov modem.mdmeoi,60h+3 ; use specific EOI for IRQ3 level mov bl,flags.comflg ; port 1..4 dec bl xor bh,bh mov portirq[bx],3 clc ; this setup worked chkint6a:ret ; auto test did not work chkint7:mov modem.mdmintc,20h ; use master 8259 Int controller cmp flags.comflg,1 ; COM1? je chkint8 ; e = yes, use IRQ 4 cmp isps2,0 ; IBM PS/2 Model 50 or above? jne chkint9 ; ne = yes, other COMs use IRQ 3 cmp flags.comflg,3 ; COM2, COM3, or COM4? jne short chkint9 ; ne = COM2 or COM4, use IRQ 3 chkint8:mov modem.mdmeoi,60h+4 ; use specific EOI for IRQ4 level mov modem.mddis,(1 shl 4) ; IRQ 4 test. mask to disable IRQ 4 mov modem.mden,not (1 shl 4); mask to enable IRQ 4 mov modem.mdintv,8+4 ; IRQ 4 interrupt vector (0ch) mov bl,flags.comflg ; port 1..4 dec bl xor bh,bh mov ax,4 ; IRQ mov portirq[bx],al jmp short chkint9a ; show message chkint9:mov modem.mdmeoi,60h+3 ; use specific EOI for IRQ 3 level mov modem.mddis,(1 shl 3) ; mask to disable IRQ 3 mov modem.mden,not (1 shl 3); mask to enable IRQ 3 mov modem.mdintv,8+3 ; IRQ 3 interrupt vector mov bl,flags.comflg ; port 1..4 dec bl xor bh,bh mov ax,3 ; IRQ mov portirq[bx],al chkint9a:push ax mov ah,prstr mov dx,offset badirq ; say assuming an IRQ int dos pop ax mov cx,10 ; decimal call valout ; show IRQ clc ret inttest:call serini ; setup port for given IRQ jc inttes2 ; c = failure mov dx,modem.mddat inc dx ; interrupt enable reg (3f9h) cli mov intkind,0 ; clear interrupt cause mov al,2 ; set xmtr holding reg empty interrupt out dx,al call delay mov al,2 ; set xmtr holding reg empty interrupt out dx,al ; again, because first may be missed sti call delay ; wait one millisec for interrupt mov al,intkind ; interrupt kind push ax call serrst ; reset port pop ax test al,2 ; check cause of interrupt, ours? jz inttes2 ; z = no, test failed clc ; this setup worked ret inttes2:stc ; failure ret chkint endp ; Test presently selected serial port for having a real 8250 UART. ; Return carry clear if 8250 present, ; else carry set and flags.comflg in ascii digits for system Bios or ; carry set for network. ; Method is to check UART's Interrupt Identification Register for high ; five bits being zero; IBM does it this way. Assumes port structure ; has been initialized with addresses of UART. 21 Feb 1987 [jrd] ; 29 May 1987 Add double check by reading Line Status Register. [jrd] chkport proc near cmp flags.comflg,4 ; non-UART port? ja chkporx ; a = yes cmp flags.comflg,0 ; undefined port? je chkporx ; e = yes push ax push dx mov dx,modem.mdiir ; UART Interrupt Ident reg (3FAh/2FAh) in al,dx ; read UART's IIR test al,30h ; are these bits set? jnz chkpor1 ; nz = yes, not an 8250/16450/16550A mov dx,modem.mdstat ; line status register in al,dx ; read to clear UART BI, FE, PE, OE bits call delay in al,dx ; these bits should be cleared test al,8eh ; are they cleared? jnz chkpor1 ; nz = no, not an 8250/16450/16550A pop dx pop ax clc ; clear carry (say 8250/etc) ret chkpor1:pop dx pop ax add flags.comflg,'0' ; set Bios usage flag (ascii digit) chkporx:stc ; set carry (say no 8250/etc) ret chkport endp ; Check for presence of IBM EBIOS ; Returns carry clear if EBIOS present, else carry set chkebios proc near mov dx,ebport ; port 0..3 mov ax,ebpresent*256+0ffh ; IBM EBIOS presence check int rs232 jc chkebios1 ; c = failure or ax,ax ; returns ax = 0 if present jnz chkebios1 ; nz = not present clc ret chkebios1:stc ; IBM EBIOS not present ret chkebios endp ; Set the baud rate for the current port, based on the value ; in the portinfo structure. Returns carry clear. BAUDST PROC NEAR mov dx,offset bdtab ; baud rate table, ascii xor bx,bx ; help is the table itself mov ah,cmkey ; get keyword call comnd jc baudst1 ; c = failure push bx ; save result mov ah,cmeol ; get confirmation call comnd pop bx jc baudst1 ; c = failure call dobaud ; use common code clc baudst1:ret BAUDST ENDP DOBAUD PROC NEAR cmp portin,-1 ; port used yet? jne dobd3 ; ne = yes, go get rate push bx ; save rate index mov bl,flags.comflg ; pass current port ident call comstrt ; do SET PORT command now pop bx jnc dobd3 ; nc = success dobd4: stc ret ; failure dobd3: push bx ; save baud rate index mov al,flags.comflg ; comms port cmp al,'E' ; EBIOS? je dobd5 ; e = yes cmp al,'4' ; UART or Bios? ja dobd1 ; a = no, networks call chkport ; check port for real 8250 UART dobd5: pop bx ; baud rate index push bx ; check if new rate is valid mov ax,bx shl ax,1 ; make a word index mov bx,offset bddat ; start of table cmp flags.comflg,'0' ; Bios? jb dobd0a ; b = no, UART mov bx,offset clbddat ; use Bios speed parameters dobd0a: add bx,ax mov ax,[bx] ; data to output to port cmp al,0FFh ; unimplemented baud rate? jne dobd0 ; ne = no mov ah,prstr mov dx,offset badbd ; give an error message int dos jmp dobd1 dobd0: pop bx ; get baud rate index push bx mov si,portval mov [si].baud,bx ; set the baud rate index mov dl,flags.comflg ; get coms port (1..4, letters) cmp dl,4 ; running on a real uart? jbe dobd2 ; be = yes, the real thing cmp dl,'E' ; EBIOS? je dobd6 ; e = yes cmp dl,'4' ; Bios? ja dobd1 ; a = no, network or dl,dl ; zero (undefined port)? jz dobd1 ; z = yes, just exit and dl,7 ; use lower three bits dec dl ; count ports as 0..3 for Bios jmp short dobd7 dobd6: test nettype,acsi ; using EBIOS.COM? jnz dobd8 ; nz = not using it mov dx,ebport ; get EBIOS port (0..3) dobd7: xor dh,dh xor ah,ah ; set serial port int rs232 ; Bios: set the parameters jmp short dobd1 ; and exit dobd8: push bx ; ACSI call send ; send current buffer first pop bx shl bx,1 ; index words mov ax,clbddat[bx] ; Bios speed settings mov word ptr xmtbufx,4 ; four bytes in packet mov ah,acsetmode ; ACSI set mode mov word ptr xmtbufx+2,ax ; Mode setting call send ; send speed update to host jmp short dobd1 ; exit dobd2: pushf cli ; interrupts off push ax ; UART, remember value to output mov dx,modem.mdcom ; LCR -- Initialize baud rate in al,dx ; get it mov bl,al ; make a copy or ax,80H ; turn on DLAB bit to access divisor part out dx,al mov dx,modem.mddat pop ax ; set the baud rate divisor out dx,al inc dx ; next address for high part mov al,ah ; set high part of divisor out dx,al mov dx,modem.mdcom ; LCR again mov al,bl ; get original setting from bl out dx,al ; restore it popf ; restore interrupt state dobd1: pop bx ; restore regs clc ret DOBAUD ENDP ; Get the current baud rate from the serial card and set it ; in the portinfo structure for the current port. Returns normally. ; This is used during initialization. GETBAUD PROC NEAR push ax push bx mov bx,portval mov al,flags.comflg cmp al,4 ; UART? ja getb3 ; a = no, Bios or Networks cmp portin,-1 ; port unused? jne getbud ; ne = no, used, go get rate mov bl,al ; pass current port ident call comstrt ; do SET PORT command now jnc getbud ; nc = success getb3: pop bx pop ax ret ; failure getbud: push cx ; save some regs push dx pushf cli ; interrupts off mov dx,modem.mdcom ; get current Line Control Register value in al,dx mov bl,al ; save it or ax,80H ; turn on to access baud rate generator out dx,al mov dx,modem.mddat ; Divisor latch inc dx in al,dx ; get high order byte mov ah,al ; save here dec dx in al,dx ; get low order byte push ax mov dx,modem.mdcom ; Line Control Register mov al,bl ; restore old value out dx,al pop ax popf ; ints back to normal cmp ax,0FFFFH ; if no port je getb2 ; e = no port, bus noise mov bx,offset bddat ; find rate's offset into table xor cl,cl ; keep track of index getb0: cmp ax,[bx] ; observed vs table divisor je getb1 ; e = found a match inc cl ; next table index cmp cl,baudlen ; at the end of the list? jge getb2 ; ge = yes, quit add bx,2 ; next table entry jmp short getb0 getb1: xor ch,ch mov bx,portval mov [bx].baud,cx ; set baud rate getb2: pop dx ; restore regs pop cx pop bx pop ax clc ret GETBAUD ENDP ; Examine incoming communications stream for a packet SOP character. ; Return CX= count of bytes starting at the SOP character (includes SOP) ; and carry clear. Return CX = 0 and carry set if SOP is not present. ; Destroys AL. peekcom proc far mov cx,count ; qty in circular buffer cmp cx,6 ; basic NAK jb peekc4 ; b = two few chars, get more push bx cli ; interrupts off, to keep srcpnt & count consistent mov bx,srcpnt ; address of next available slot in buffer sub bx,cx ; minus number of unread chars in buffer cmp bx,offset source ; located before start of buf? jae peekc1 ; ae = no add bx,bufsiz ; else do arithmetic modulo bufsiz peekc1: mov al,[bx] cmp al,trans.rsoh ; packet receive SOP? je peekc3 ; e = yes inc bx cmp bx,offset source+bufsiz ; beyond end of buffer? jb peekc2 ; b = no mov bx,offset source ; wrap around peekc2: loop peekc1 ; keep looking sti pop bx stc ; set carry for no SOP ret peekc3: sti ; interrupts back on now pop bx inc cx ; include SOP in count clc ; say SOP found ret ; CX has count remaining peekc4: push bx ; read from port, add to buffer mov bx,portval push si ; used by packet routines call [bx].rcvproc ; read routine pop si jc peekc7 ; c = nothing available cmp count,0 ; something put in buffer? jne peekc7 ; ne = yes, go read from buffer mov bx,srcpnt ; were next read would be inc bx ; add to buffer cmp bx,offset source+bufsiz ; pointing beyond end of buffer? jb peekc5 ; b = no mov bx,offset source ; wrap pointer, modulo bufsiz peekc5: cli mov [bx],al ; store byte mov srcpnt,bx ; update pointer to next free slot inc count cmp count,bufsiz ; count more that buffer size? jbe peekc6 ; be = no mov count,bufsiz ; limit to bufsiz (tells the truth) peekc6: sti peekc7: pop bx cmp count,6 ; anything now? jae peekcom ; ne = yes, repeat examination xor cx,cx ; return count of zero stc ; say no data ret peekcom endp ; Get Char from serial port buffer. ; returns carry set if no character available at port, otherwise ; returns carry clear with char in al, # of chars in buffer in dx. prtchr proc near cmp holdscr,0 ; Holdscreen in effect? jne prtch3 ; ne = yes, do not read call chkxon ; see if we need to send XON cmp repflg,0 ; REPLAY? je prtch1 ; e = no jmp prtchrpl ; yes, do replay file reading prtch1: cmp count,0 ; is buffer empty? jne prtch4 ; ne = no, read from it push bx mov bx,portval call [bx].rcvproc ; read routine pop bx ; fall through to grab new char jc prtch3 ; c = nothing available cmp count,0 ; something put in buffer? jne prtch4 ; ne = yes, go read from buffer prtch2: inc dx clc ; return single char already in AL ret prtch3: xor dx,dx ; return count of zero stc ; say no data ret prtch4: push si ; save si cli ; interrupts off, to keep srcpnt & count consistent mov si,srcpnt ; address of next available slot in buffer sub si,count ; minus number of unread chars in buffer cmp si,offset source ; located before start of buf? jae prtch5 ; ae = no add si,bufsiz ; else do arithmetic modulo bufsiz prtch5: lodsb ; get a character into al dec count ; one less unread char now sti ; interrupts back on now pop si mov dx,count ; return # of chars in buffer or al,al ; is this a null byte? jnz prtch6 ; nz = no cmp flags.comflg,'t' ; using TCP/IP Telnet? jne prtch6 ; ne = no cmp lastread,CR ; CR NULL? jne prtch6 ; ne = no mov lastread,al ; remember what we last read stc ; discard the NVT NULL ret prtch6: mov lastread,al ; remember what we last read clc ret prtchr endp uartrcv proc near ; UART receive stc ; say not returning char in al here ret ; interrupt driven so no work here uartrcv endp ebircv proc near ; EBIOS calls mov dx,ebport ; port 0..3 mov ah,ebrcv ; IBM EBIOS receive /no wait int rs232 ; does line check then char ready chk test ah,8ch ; timeout, framing error, parity error? jnz ebircv2 ; nz = error, no char jmp schrcv ; z = success, process char in AL ebircv2:stc ; say not returning char in al here ret ebircv endp biosrcv proc near ; Bios calls xor dh,dh ; assume port 1, find current port mov dl,flags.comflg ; get port number (1..4) or dl,dl ; zero (no such port)? jz biosrc1 ; z = yes, don't access it and dl,7 ; use low three bits dec dl ; address ports as 0..3 for Bios mov ah,3 ; check port status, std Bios calls int rs232 ; Bios call test ah,mdminp ; data ready? jnz biosrc2 ; nz = yes, get one biosrc1:stc ; say not returning char in al here ret biosrc2:mov ah,2 ; receive a char into al int rs232 ; Bios call test ah,8ch ; timeout, framing error, parity error? jnz biosrc1 ; nz = error, no char jmp short schrcv ; single char read post processor biosrcv endp schrcv proc near ; single char read final filter test flowcnt,2 ; using input XON/XOFF flow control? jz schrcv3 ; z = no mov ah,al ; get copy of character and ah,parmsk ; strip parity, if any, before testing cmp ah,flowoff ; acting on XOFF? jne schrcv2 ; ne = no, go on cmp xofsnt,0 ; have we sent an outstanding XOFF? jne schrcv1 ; ne = yes, ignore (possible echo) mov xofrcv,bufon ; set the flag saying XOFF received schrcv1:stc ; say not returning char in al here ret schrcv2:cmp ah,flowon ; acting on XON? jne schrcv3 ; ne = no, go on mov xofrcv,off ; clear the XOFF received flag xor dx,dx stc ret ; no data to return schrcv3:xor ah,ah clc ; return char in al ret ; expect count=0 schrcv endp ; REPLAY, read char from a file prtchrpl proc near cmp repflg,2 ; at EOF already? jne prtchrp1 ; ne = no stc ; yes, return with no char ret prtchrp1:push bx push cx xor dx,dx test xofsnt,usron ; user level xoff sent? jz prtchrp2 ; z = no pop cx ; suppress reading here pop bx stc ; say not returning char in al here ret prtchrp2:test tekflg,tek_active ; doing graphics mode? jnz prtchrp3 ; nz = yes, do not insert pauses in al,ppi_port ; delay in al,ppi_port in al,ppi_port ; burn some bus cycles in al,ppi_port ; because a 1 ms wait is too long in al,ppi_port prtchrp3:mov ah,readf2 mov bx,diskio.handle ; file handle mov cx,1 ; read one char mov dx,offset decbuf ; to this buffer int dos jc prtchrp4 ; c = read failure cmp ax,cx ; read the byte? jne prtchrp4 ; ne = no pop cx pop bx mov al,decbuf ; get the char into al clc ret ; return it prtchrp4:call beep mov ax,40 ; wait 40 millisec call pcwait call beep mov repflg,2 ; say at EOF pop cx pop bx stc ; say not returning char in al here ret prtchrpl endp ; DECnet receive routine DECRCV PROC NEAR test nettype,declat ; LAT interface? jz decrcv1 ; z = not LAT mov dx,lathand or dx,dx ; invalid handle? jz decrcv1 ; z = yes, try CTERM or lathand,0ff00h mov ah,latread ; read char via LAT into AL int latint test ah,80h ; char available? jz decrcv2 ; z = yes ; non-SCB status check, slower and much safer mov ah,latstat ; get status mov dx,lathand int latint test ah,4 ; session not active? jnz decrcv3 ; nz = yes, no valid session stc ; say not returning char in al here ret ; end alterntive code ; push es ; push bx ; les bx,latscbptr ; test es:[bx].sstatus,18h ; status: stop slot or circuit failure ; pop bx ; pop es ; jnz decrcv4 ; nz = yes, no valid session ; stc ; return no char ; ret decrcv1:test nettype,decnet ; is CTERM active? jz decrcv3 ; z = no mov dx,decneth ; handle or dx,dx ; legal? jz decrcv3 ; z = no mov ax,dcstat ; CTERM status int decint test ah,0c0h ; no session, DECnet error? jnz decrcv3 ; nz = yes, stop here ; test ah,1 ; data available? ; jz decrcv4 ; z = no ; data available test fails under flow control, maybe a Cterm bug. mov ax,dread ; read char via CTERM int decint test ah,80h ; char received? jnz decrcv4 ; nz = no decrcv2:jmp schrcv ; use common completion code decrcv3:call decclose ; close connection test flags.remflg,dserver ; server mode? jz decrcv4 ; z = no call serini ; reinitialize it for new session decrcv4:stc ; say not returning char in al here ret DECRCV ENDP ; NetBios Receive packet routine. If a new packet has been received unpack ; the data and request a new one with no-wait option. If a receive request is ; still outstanding just return with no new data. ; Return carry clear if success. If failure, reset serial port (Server mode ; reinits serial port). Return carry set. No entry setup needed. RECEIVE PROC NEAR ; receive network session pkt cmp pcnet,1 ; net ready yet? jbe receiv3 ; be = no, declare a broken session cmp rposted,1 ; is a request outstanding now? je receiv4 ; e = yes (1), don't do another jb receiv1 ; b = no (0), do one now call receiv2 ; have new pkt, unpack, do new recv jnc receiv1 ; nc = success ret ; else return carry set receiv1:mov rposted,1 ; say posting a receive now mov rcv.scb_length,nbuflen ; length of input buffer mov rcv.scb_cmd,nreceive+nowait ; receive, no wait push bx mov bx,offset rcv ; setup pointer to scb call nbsession pop bx stc ; set carry to say no char yet ret receiv2:mov al,rcv.scb_err ; returned status or al,al ; success? jz receiv5 ; z = yes, get the data cmp al,npending ; pending receive? je receiv4 ; e = yes cmp al,6 ; message incomplete? je receiv5 ; e = yes, get what we have anyway cmp al,0bh ; receive cancelled? je receiv4 ; e = yes cmp al,18h ; session ended abnormally? jbe receiv3 ; e = yes, b = other normal errors mov ah,prstr mov dx,offset recmsg ; give error message int dos mov al,rcv.scb_err ; get error code call decout ; show error code ; Error return receiv3:call nbclose ; close the connection test flags.remflg,dserver ; server mode? jz receiv4 ; z = no call serini ; reinitialize it for new session receiv4:stc ; say not returning char in al here ret receiv5:mov rposted,0 ; clear interlock flag test nettype,acsi ; ACSI? jnz receiv6 ; nz = yes jmp blkrcv ; process block of data receiv6:jmp acsircv ; process special format block data RECEIVE ENDP ; Block receive transfer and flow control scan routine ; Enter with DS:rcv.scb_baddr pointing at source buffer (rcvbuf), ; and rcv.scb_length holding incoming byte count. ; Destroys reg BX ; Shared by NetBios, Novell, Opennet, Ungerman Bass, 3ComBAPI, TCP/IP, etc blkrcv proc near push cx ; new packet has been received push dx ; copy contents to circ buf source push si mov dh,flowon mov dl,flowoff mov si,rcv.scb_baddr ; source of text mov bx,srcpnt ; address of destination buffer slot blkrcv6:mov cx,rcv.scb_length ; get remaining returned byte count jcxz blkrcv13 ; z = nothing there mov ax,offset source+bufsiz ; end of destination buffer+1 sub ax,bx ; space remaining at end of buffer jns blkrcv7 ; should never be negative neg ax ; but if so invert blkrcv7:cmp ax,cx ; buffer ending vs incoming byte count jge blkrcv8 ; ge = enough for this pass mov cx,ax ; limit this pass to end of the buffer blkrcv8:sub rcv.scb_length,cx ; deduct chars done in this pass add count,cx ; add them to the count cld ; inner loop "block" transfer test flowcnt,2 ; doing input XON/XOFF flow control? jz blkrcv20 ; z = no blkrcv9:lodsb ; get byte from rcvbuf to al mov ah,al ; get copy of character and ah,parmsk ; strip parity, if any, before testing cmp ah,dl ; acting on Xoff? jne blkrcv10 ; ne = no cmp xofsnt,0 ; have we sent an XOFF? jne blkrcv12 ; ne = yes, ignore this XOFF char mov xofrcv,bufon ; set flag saying buffer XOFF received dec count ; uncount flow control jmp short blkrcv12 ; and skip this character blkrcv10:cmp ah,dh ; acting on XON? jne blkrcv11 ; ne = no, go on mov xofrcv,off ; clear the XOFF received flag dec count ; uncount flow control jmp short blkrcv12 ; and skip this character blkrcv11:mov [bx],al ; store new char in buffer "source" inc bx blkrcv12:loop blkrcv9 ; bottom of inner loop jmp short blkrcv22 blkrcv20:push es ; no flow control, just do copy push di mov ax,ds mov es,ax mov di,bx ; destination shr cx,1 ; prep for word moves jnc blkrcv21 ; nc = even number of bytes movsb blkrcv21:rep movsw ; do quick copy mov bx,di ; update destination pointer pop di pop es ; update buffer pointer for wrapping blkrcv22:cmp bx,offset source+bufsiz ; pointing beyond end of buffer? jb blkrcv6 ; b = no, do next pass mov bx,offset source ; wrap pointer, modulo bufsiz jmp short blkrcv6 ; do next pass blkrcv13:mov srcpnt,bx ; update pointer to next free slot cmp count,bufsiz ; count more that buffer size? jbe blkrcv14 ; be = no mov count,bufsiz ; limit to bufsiz (tells the truth) blkrcv14:pop si pop dx pop cx stc ; say no char in al from us ret blkrcv endp ; ACSI block receive transfer and flow control scan routine ; Enter with DS:rcv.scb_baddr pointing at source buffer (rcvbuf), ; and rcv.scb_length holding incoming byte count. ; Destroys regs AX and BX. ; Format of packet: int count of entire block, then [char, status] byte pairs acsircv proc near push cx ; new packet has been received push dx ; copy contents to circ buf source push si mov dh,flowon mov dl,flowoff mov bx,srcpnt ; address of destination buffer slot mov si,rcv.scb_baddr ; source of text cld lodsw ; get internal length word mov cx,rcv.scb_length ; get block length mov rcv.scb_length,0 ; clear counter sub cx,2 ; data bytes remaining in block cmp ax,cx ; internal vs external count jae acsrcv1 ; ae=internal is gt or equal to ext mov cx,ax ; use shorter internal count acsrcv1:shr cx,1 ; count words in block jcxz acsrcv14 ; z = nothing there acsrcv9:lodsw ; get char+status bytes from rcvbuf test ah,80h ; status, is it a command? jnz acsrcv12 ; nz = yes, ignore the pair test flowcnt,2 ; using input XON/XOFF flow control? jz acsrcv11 ; z = no mov ah,al ; get copy of character and ah,parmsk ; strip parity, if any, before testing cmp ah,dl ; acting on Xoff? jne acsrcv10 ; ne = no cmp xofsnt,0 ; have we sent an XOFF? jne acsrcv12 ; ne = yes, ignore this XOFF char mov xofrcv,bufon ; set flag saying buffer XOFF received jmp short acsrcv12 ; and skip this character acsrcv10:cmp ah,dh ; acting on XON? jne acsrcv11 ; ne = no, go on mov xofrcv,off ; clear the XOFF received flag jmp short acsrcv12 ; and skip this character acsrcv11:mov [bx],al ; store new char in buffer "source" inc bx inc count ; add it to the count cmp bx,offset source+bufsiz ; pointing beyond end of buffer? jb acsrcv12 ; b = no mov bx,offset source ; wrap pointer, modulo bufsiz acsrcv12:loop acsrcv9 acsrcv13:mov srcpnt,bx ; update pointer to next free slot cmp count,bufsiz ; count more that buffer size? jbe acsrcv14 ; be = no mov count,bufsiz ; limit to bufsiz (tells the truth) acsrcv14:pop si pop dx pop cx stc ; say no char in al from us ret acsircv endp ; NetBios Receive post processing interrupt routine. ; Sets rposted interlock flag RPOST PROC NEAR ; NetBios receive post interrupt routine push ds push ax mov ax,data ; reestablish data segment mov ds,ax mov rposted,2 ; set interlock flag to completed pop ax pop ds iret ; return from interrupt RPOST endp ; TES block mode receive, uses blkrcv to process results TESRCV proc near push di push cx push dx push es mov ax,data mov es,ax ; es:di will point to rcvbuf mov di,offset rcvbuf mov cx,nbuflen ; buffer length mov dx,tesport ; operational port mov ah,tesbread ; block read int rs232 jcxz tesrcv1 ; z = no characters read mov rcv.scb_length,cx ; prepare for receive call call blkrcv ; process rcvbuf jmp short tesrcv2 tesrcv1:call tesstate ; get session status to AH and ah,7fh ; trim high bit (transition states) or ah,ah ; session active? jnz tesrcv2 ; nz = yes, carry on call tesclose ; close our end tesrcv2:pop es pop dx pop cx pop di stc ; say not returning char in al here ret TESRCV endp ; Ungermann-Bass NETCI port receive characters routine. Receive one or more ; characters. Calls the blkrcv routine to transfer character to main source ; circular buffer. Return carry clear if success. UBRECV PROC near push cx push es mov ax,data mov es,ax ; es:bx will point to rcvbuf mov bx,offset rcvbuf mov cx,nbuflen ; buffer length ubrecv2:test nettype,bapi+tcpnet ; 3Com BAPI or TCP Telnet interface? jz ubrecv2a ; z = no mov ah,bapiread xor dh,dh ; session 0 test nettype,tcpnet ; TCP/IP Telnet? jz ubrecv2d ; z = no call ktcpcom ; Far call Telnet code jmp short ubrecv2e ubrecv2d:int bapiint ubrecv2e:cmp ah,3 ; status, no session and above jb ubrecv3 ; b = no, successful? jmp short ubrecv2b ; broken connection, terminate it ubrecv2a:test nettype,telapi ; Novell TELAPI? jz ubrecv2c ; z = no, use Int 6Bh kind ; cmp pcnet,2 ; port going? ; jb ubrec1 ; b = no push si push bx mov si,bx ; use es:si for buffer address mov bx,telses ; session number mov ah,telread int rs232 pop bx pop si xchg ax,cx ; byte count returned in AX jcxz ubrecv2b ; z = connection broken or cx,cx jns ubrecv3 ; ns = no error cmp cx,-35 ; status of no data? jne ubrecv2b ; ne = no xor cx,cx ; mimic no data jmp short ubrec1 ubrecv2b: call ubclose jmp short ubrec1 ubrecv2c:test nettype,netone ; UB? jz ubrec1 ; z = no, do nothing mov ax, nciread ; function 1 (receive) port 0 [ohl] int netci ; get characters [ohl] ubrecv3:jcxz ubrec1 ; cx = z = nothing to do mov rcv.scb_length,cx ; prepare for rpost call call blkrcv ; process buffer ubrec1: pop es pop cx stc ; say not returning char in al here ret UBRECV ENDP ; Beame & Whiteside TCP receive routine [JRS] bwrecv proc near ; [JRS] test nettype,bwtcp ; active? jnz bwrecv1 ; nz = yes stc ret bwrecv1:push di ; [JRS] save the environment push si ; [JRS] push dx ; [JRS] push cx ; [JRS] push bx ; [JRS] mov ah,readf2 ; [JRS] read from "file" mov bx,bwhandle ; [JRS] device handle or bx,bx jz bwrecv4 ; z = invalid handle mov cx,nbuflen-4 ; number of bytes to read - safety mov dx,offset rcvbuf ; [JRS] data buffer is DS:DX int dos ; [JRS] ask dos to get it jc bwrecv5 ; [JRS] c = no data available mov cx,ax ; [JRS] get the number of bytes read jcxz bwrecv4 ; [JRS] no chars read is a hangup cmp ax,nbuflen-4 ; check on sanity ja bwrecv5 ; a = error of some kind, ignore mov si,offset rcvbuf call bwtnopt ; do options scanning jmp short bwrecv5 bwrecv4:call bwclose ; read failed, quit bwrecv5:pop bx ; [JRS] restore environment pop cx ; [JRS] pop dx ; [JRS] pop si ; [JRS] pop di ; [JRS] stc ; [JRS] flag no characters read ret ; [JRS] bwrecv endp ; [JRS] ; Beame & Whiteside telnet options scanner and processor ; Enter with newly read material in ds:si, of length CX bytes bwtnopt proc near or cx,cx jle bwtnopt1 ; le = nothing to do cmp optstate,0 ; outside IAC string? je bwtnopt2 ; e = yes jmp bwtnopt20 ; do options bwtnopt1:ret bwtnopt2:push cx push es mov ax,seg rcvbuf ; make es:di the receiver buffer mov es,ax mov di,si mov al,IAC ; IAC cld repne scasb ; look for IAC pop es pop cx mov ax,di ; points one byte after break jne bwtnopt3 ; ne = no IAC dec ax ; backup to IAC bwtnopt3:sub ax,si ; minus starting offset sub cx,ax ; original count - mov rcv.scb_length,ax ; data length before IAC mov rcv.scb_baddr,si ; source of text add si,ax ; starting point for IAC or ax,ax ; any leading text? jz bwtnopt4 ; z = nothing to block receive upon call blkrcv ; dispose of it, saves si and cx bwtnopt4:or cx,cx ; bytes remaining in buffer jg bwtnopt5 ; if positive then si == IAC byte xor cx,cx ; force zero ret bwtnopt5:inc si dec cx ; skip IAC mov optstate,2 ; read two more chars jmp bwtnopt ; repeat bwtnopt20:cmp optstate,2 ; reading 1st char after IAC? jb bwtnopt23 ; b = no dec cx ; read the char lodsb cmp al,SB ; before legal options? jae bwtnopt22 ; ae = no inc si ; recover char inc cx mov optstate,0 ; clear Options machine jmp bwtnopt ; continue bwtnopt22:mov option1,al ; save first Option byte mov optstate,1 ; get one more byte jmp bwtnopt ; get the second Options byte bwtnopt23:mov optstate,0 ; read second char after IAC dec cx ; read the char lodsb mov option2,al ; second options byte mov ah,option1 mov bx,portval mov bl,[bx].ecoflg ; echo status ; decode options and respond cmp al,TELOPT_ECHO ; Echo? jne bwtnopt30 ; ne = no cmp ah,WILL ; remote host will echo? jne bwtnopt26 ; ne = no cmp bl,0 ; are we doing local echo? je bwtnopt29 ; e = no mov ah,DO ; say please echo call bwsendiac xor bl,bl ; say we should not echo call setecho ; set our echo state jmp bwtnopt bwtnopt26:cmp ah,WONT ; remote host won't supply echo? jne bwtnopt28 ; ne = no cmp bl,0 ; are we doing local echo? jne bwtnopt29 ; ne = yes mov ah,DONT call bwsendiac mov bl,lclecho ; do local echoing call setecho ; set local echoing state jmp bwtnopt bwtnopt28:cmp ah,DO ; remote host wants us to echo? jne bwtnopt29 ; ne = no mov ah,WONT ; decline call bwsendiac bwtnopt29:jmp bwtnopt bwtnopt30:cmp al,TELOPT_SGA ; SGA? jne bwtnopt40 ; ne = no cmp ah,WONT ; host won't do SGAs? jne bwtnopt33 ; ne = no cmp sgaflg,0 ; our state is don't too? jne bwtnopt35 ; ne = yes inc sgaflg ; change state mov ah,DONT ; say please don't call bwsendiac cmp bl,0 ; doing local echo? jne bwtnopt35 ; ne = yes mov bl,lclecho ; change to local echoing call setecho jmp bwtnopt ; continue bwtnopt33:cmp ah,WILL ; host will use Go Aheads? jne bwtnopt35 ; ne = no cmp sgaflg,0 ; doing SGAs? jne bwtnopt35 ; ne = no mov sgaflg,0 ; change to doing them mov ah,DO call bwsendiac bwtnopt35:jmp bwtnopt bwtnopt40:cmp ah,WILL ; all other Options jne bwtnopt41 ; ne = no mov ah,DONT ; say do not call bwsendiac ; respond jmp bwtnopt43 ; continue bwtnopt41:cmp ah,DO jne bwtnopt42 mov ah,WONT ; say we won't call bwsendiac mov ah,DONT ; and host should not either call bwsendiac jmp bwtnopt43 ; continue bwtnopt42:cmp ah,DONT jne bwtnopt43 mov ah,WONT ; say we won't call bwsendiac bwtnopt43:jmp bwtnopt ; continue bwtnopt endp ; Beame & Whiteside, send IAC byte1 byte2, where byte 1 is in AH ; and byte 2 is in option2 bwsendiac proc near push cx push si push ax mov ah,IAC ; send IAC call outchr pop ax ; send command byte call outchr mov ah,option2 ; send response byte call outchr pop si pop cx ret bwsendiac endp ; Update local-echo status from B&W Telnet Options negotiations ; Enter with BL = 0 or lclecho, to clear or set local-echo setecho proc near and yflags,not lclecho ; assume no local echo in emulator or yflags,bl ; set terminal emulator push si mov si,portval mov [si].ecoflg,bl ; set mainline SET echo flag pop si cmp ttyact,0 ; acting as a Terminal? je setecho1 ; e = no push cx push si call dword ptr ftogmod ; toggle mode line call dword ptr ftogmod ; and again pop si pop cx setecho1:ret setecho endp ; Put the char in AH to the serial port, assumimg the port is active. ; Returns carry clear if success, else carry set. ; 16 May 1987 Add entry point OUTCH2 for non-flow controlled sending to ; prevent confusion of flow control logic at top of outchr; used by receiver ; buffer high/low water mark flow control code. [jrd] outchr proc near cmp quechar,0 ; char queued for transmission? je outch0 ; e = no, no XOFF queued xchg ah,quechar ; save current char cmp ah,flowoff ; really XOFF? jne outch0a ; ne = no mov xofsnt,bufon ; we are senting XOFF at buffer level outch0a:call outch2 ; send queued char (XOFF usually) xor ah,ah ; replacement for queued char, none xchg ah,quechar ; recover current char, send it outch0: test flowcnt,1 ; doing output XON/XOFF flow control? jz outch1b ; z = no, just continue cmp ah,flowoff ; sending xoff? jne outch1 ; ne = no mov xofsnt,usron ; indicate user level xoff being sent jmp short outch1b outch1: and xofsnt,not usron ; cancel user level xoff cmp ah,flowon ; user sending xon? jne outch1b ; ne = no mov xofsnt,off ; say an xon has been sent (cancels xoff) outch1b:test flowcnt,2 ; using incoming xon/xoff? jz outch2 ; z = no cmp xofrcv,off ; are we being held (xoff received)? je outch2 ; e = no - it's OK to go on push cx ; save reg mov ch,15 ; 15 sec timeout interval xor cl,cl ; convert to 4 millsec increments outch1a:cmp xofrcv,off ; are we being held (xoff received)? je outch1c ; e = no - it's OK to go on push ax mov ax,4 ; 4 millisec wait loop call pcwait pop ax loop outch1a ; and try it again mov xofrcv,off ; timed out, force it off cmp ttyact,0 ; in Connect mode? je outch1c ; e = no push ax ; save char around the call call beep ; let user know we are xoff-ed pop ax ; but are sending anyway outch1c:pop cx ; end of flow control section ; OUTCH2 is entry point for sending without flow control OUTCH2: mov al,ah ; Parity routine works on AL call dopar ; Set parity appropriately mov ah,al ; Don't overwrite character with status cmp repflg,0 ; doing REPLAY from a file? je outch3 ; e = no and al,7fh ; strip parity cmp al,'C'-40h ; Control-C? (to exit playback mode) je outch2a ; e = yes, return failure clc ; return success, send nothing ret outch2a:stc ; failure, to exit playback mode ret outch3: push bx mov bx,portval ; output char is in register AH call [bx].sndproc ; output processing routine pop bx ret outchr endp uartsnd proc near ; UART send push cx push dx mov dx,modem.mddat add dx,4 ; modem control reg 3fch cmp dupflg,0 ; full duplex? jne uartsn1 ; ne = no, half test flowcnt,4 ; using RTS to control incoming chars? jz uartsn3 ; z = no mov cx,8000 ; ~10 seconds worth of waiting on CTS add dx,2 ; modem status reg 3feh jmp short uartsn2 ; do CTS test/waiting ; Half Duplex here uartsn1:in al,dx ; modem control reg 3fch or al,2 ; assert RTS for hardware transmit push ax in al,ppi_port ; delay pop ax out dx,al add dx,2 ; modem status register 3feh in al,ppi_port ; delay in al,ppi_port ; delay in al,dx ; get DSR status test al,20h ; ignore CTS if DSR is not asserted jz uartsn3 ; z = DSR not asserted mov cx,8000 ; ~10 seconds worth of waiting on CTS ; Half Duplex and RTS/CTS flow cont. uartsn2:in al,dx ; wait on CTS (ah has output char) test al,10h ; is CTS asserted? (dx = 3feh) jnz uartsn3 ; nz = yes push ax ; preserve char in ah mov ax,1 ; wait one millisec call pcwait pop ax loop uartsn2 ; test again push ax call beep ; timeout, make non-fatal pop ax ; continue to send the char uartsn3:mov bx,portval cmp [bx].baud,Bsplit ; split-speed mode? jne uartsn4 ; ne = no mov al,ah ; [pslms] call out75b ; do split speed sending at 75 baud pop dx pop cx ret ; out75b sets/clears carry bit uartsn4:xor cx,cx uartsn4a:mov dx,modem.mdstat ; get port status in al,dx test al,20H ; Transmitter (THRE) ready? jnz uartsn5 ; nz = yes in al,ppi_port ; delay in al,ppi_port ; delay loop uartsn4a jmp short uartsn8 ; Timeout uartsn5:mov al,ah ; Now send it out mov dx,modem.mddat ; use a little time push ax in al,ppi_port ; delay pop ax out dx,al cmp dupflg,0 ; full duplex? je uartsn7 ; e = yes cmp al,trans.seol ; End of Line char? jne uartsn7 ; ne = no xor cx,cx ; loop counter uartsn6:mov dx,modem.mdstat ; modem line status reg in al,dx ; read transmitter shift reg empty bit push ax in al,ppi_port ; delay, wait for char to be sent in al,ppi_port in al,ppi_port in al,ppi_port pop ax test al,40h ; is it empty? loopz uartsn6 ; z = no, not yet mov dx,modem.mddat add dx,4 ; modem control reg 3fch in al,dx and al,not 2 ; unassert RTS push ax in al,ppi_port ; delay pop ax out dx,al uartsn7:pop dx ; exit success pop cx clc ret uartsn8:call beep pop dx ; exit failure pop cx stc ret uartsnd endp biossnd proc near ; Bios send push cx ; find current port mov cx,5 ; retry counter push dx xor dx,dx ; assume port 1 mov dl,flags.comflg ; get port number (1..4) or dl,dl ; zero (no such port)? jz biossn3 ; z = yes, don't access it and dl,7 ; use lower three bits dec dl ; address ports as 0..3 for Bios mov al,ah ; now send it out biossn2:push ax ; save char mov ah,1 ; send char int rs232 ; bios send shl ah,1 ; set carry if failure pop ax ; recover char jnc biossn4 ; nc = success push ax mov ax,60 ; wait 60 ms call pcwait ; this must preserve cx and dx pop ax ; recover char loop biossn2 ; try again biossn3:stc ; fail through here biossn4:pop dx pop cx ret ; c set = failure, else success biossnd endp ebisnd proc near ; EBIOS block send mov bx,xmtcnt ; count of chars in buffer mov xmtbufx[bx],ah ; put char in buffer inc xmtcnt ; count of items in this buffer and ah,7fh ; strip parity cmp xmtcnt,length xmtbuf ; is buffer full now? jae ebisnd2 ; ae = buffer is full, send it now cmp ah,trans.seol ; end of packet? je ebisnd2 ; e = yes, send buffer test flowcnt,1 ; using output XON/XOFF flow control? jz ebisnd1 ; z = no cmp ah,flowon ; flow control? je ebisnd2 ; e = yes, always expedite cmp ah,flowoff ; ditto for flow off je ebisnd2 ebisnd1:cmp ttyact,0 ; are we in Connect mode? jne ebisnd2 ; ne = yes, send now clc ; e = no, wait for more before sending ret ebisnd2:push si mov si,offset xmtbufx ebisnd3:cmp xmtcnt,0 ; buffer count jle ebisnd4 ; le = nothing to send cld lodsb ; read next byte from buffer push si mov ah,ebsend ; EBIOS send char in AL mov dx,ebport ; port 0..3, do here to waste time int rs232 ; bios send pop si shl ah,1 ; put status high bit into carry jc ebisnd4 ; c = failure dec xmtcnt jmp short ebisnd3 ebisnd4:pop si ret ; c set = failure, else success ebisnd endp decsnd proc near ; DECnet/LAT send processor test nettype,declat ; LAT? jz decsnd3 ; z = no, use CTERM mov cx,100 ; retry counter mov byte ptr temp,ah ; outgoing char decsnd1:mov dx,lathand ; LAT handle or dx,dx ; legal handle? jz decsnd4 ; z = invalid handle push cx mov al,byte ptr temp mov ah,latsend ; LAT send byte int latint pop cx or ah,ah ; status jnz decsnd2 ; nz = failed, check clc ret decsnd2:mov ah,latstat ; status call mov dx,lathand ; handle push cx int latint pop cx test ah,4 ; session active? jnz decsnd4 ; nz = no, fail mov ax,10 ; wait 10 millisecs call pcwait loop decsnd1 ; retry jmp short decsnd4 ; fail outright decsnd3:mov dx,decneth ; DECnet, handle or dx,dx ; legal handle? jz decsnd4 ; z = invalid handle mov bl,ah ; CTERM char to be sent mov ax,dsend ; send byte in bl int decint rcl ah,1 ; status 80h bit, did char get sent? jc decsnd4 ; c = failure ret decsnd4:call decclose ; failure, close connection stc ret decsnd endp ; Software uart that generates output rate of 75 baud independently of ; 8250 baudrate; use with V.23 split speed modems. ; This routine outputs a character in 8,,1 format only. ; To generate good bit timing, latency is to be kept low; now set for max ; 12% bit distortion and 1.2% speed deviation (about the same as the input ; stage of a HW-uart), which requires latency < 3ms (i e the same as 8250 ; requires for receive in 9600 baud) ; Creator Dan Norstedt 1987. Implemented 18 Feb 1988 by [pslms]. out75b proc near mov timeract,1 ; say we are allocating the timer chip push cx push dx xchg ax,bx ; save char to output mov bh,1 ; prepare output char mov cx,cnt75b ; maximum end count out75b1:call read_timer2 ; save previous end count in CX, read timer ; test for timer still decrementing ? jb out75b1 ; b = yes, wait (for a maximum of 1 bit) mov al,0b4h ; set up counter 2 to mode 2, load LSB+MSB out timercmd,al ; set mode 2 = rate generator jmp $+2 mov ax,cnt75b*4+cnt75b*4+cnt75b*2-precomp ; set start point out timer2data,al ; output LSB jmp $+2 xchg cx,ax ; save value in CX for compare in READ_TIMER2 mov al,ch ; output MSB cli ; timer starts counting on next instr, make out timer2data,al ; sure it's not to far of from start bit in al,ppi_port ; get Port B contents jmp $+2 and al,0fch ; mask speaker and gate 2 bits inc ax out ppi_port,al ; set speaker off and gate 2 on mov al,-1 out timer2data,al ; set counter wraparound to 0FFFFH jmp $+2 out timer2data,al mov bp,cnt75b*4+cnt75b*4+cnt75b ; set timer value for next bit mov dx,modem.mddat ; get com port address add dx,3 ; address of it's line control register in al,dx ; get port status jmp $+2 out75b2:or al,brkbit ; set line to space (by using break bit) out75b3:out dx,al ; once start bit is out, we may reenable sti ; without getting extra jitter out75b4:call read_timer2 jns out75b5 ; ns = timer doesn't seem to run cmp ax,bp ; time for next bit? jns out75b4 ; ns = no, wait sub bp,cnt75b ; yes, step time to next event in al,dx ; get line control register and al,0bfh ; remove break bit shr bx,1 ; carry for mark bit, none for space jnc out75b2 ; nc = it was a space (we know BX is non-zero) jnz out75b3 ; mark, and not the last one jmp $+2 out dx,al ; last, start to send stop bit pop dx pop cx mov timeract,0 ; say we are finished with the timer chip cmp quechar,0 ; any char queued to be sent? je out75b6 ; e = no call outchr ; yes, send it now out75b6:clc ret out75b5:in al,dx ; timer doesn't function properly, and al,0bfh ; restore com port and return error out dx,al mov timeract,0 ; say we are finished with the timer chip pop dx pop cx stc ret out75b endp read_timer2 proc near mov al,80h ; Freeze timer 2 out timercmd,al jmp $+2 in al,timer2data ; Get LSB jmp $+2 mov ah,al in al,timer2data ; Get MSB xchg al,ah ; Get LSB and MSB right cmp ax,cx ; Compare to previous sample mov cx,ax ; Replace previous sample with current ret read_timer2 endp ; NetBios Send packet routine. Send xmt scb with no-wait option. Waits ; up to 6 seconds for current Send to complete before emitting new Send. ; Failure to Send resets serial port (Server mode allows reiniting of serial ; port). Returns carry clear for success, carry set for failure. ; Enter with xmtcnt holding length of data in xmtbuf to be sent. SEND PROC NEAR ; Network. Send session packet mov bx,xmtcnt ; count of chars in buffer test nettype,acsi ; ACSI? jz send32 ; z = no or bx,bx ; at start of buffer? jnz send31 ; nz = no mov bx,2 ; include internal count word mov word ptr xmtbufx,bx mov xmtcnt,bx send31: mov xmtbufx[bx+1],0 ; status inc xmtcnt add word ptr xmtbufx,2 ; internal count word send32: mov xmtbufx[bx],ah ; put char in buffer inc xmtcnt ; count of items in this buffer and ah,7fh ; strip parity cmp xmtcnt,length xmtbuf ; is buffer full now? jae send22 ; ae = buffer is full, send it now test nettype,acsi ; ACSI? jz send33 ; z = no cmp xmtcnt,512 ; ACSI has hard 512 byte limit jb send33 ; b = not full yet mov xmtcnt,512 ; limit buffer jmp short send22 ; send only this buffer send33: cmp ah,trans.seol ; end of packet? je send22 ; e = yes, send buffer test flowcnt,1 ; using output XON/XOFF flow control? jz send21 ; z = no cmp ah,flowon ; flow control? je send22 ; e = yes, always expedite cmp ah,flowoff ; ditto for flow off je send22 send21:cmp ttyact,0 ; are we in Connect mode? jne send22 ; ne = yes, send now clc ; e = no, wait for more before sending ret send22: cmp pcnet,1 ; network ready yet? ja send0b ; a = net is operational je send0c ; e = net but no session, fail jmp send3a ; no net, fail send0c: jmp send3 ; net but no session send0b: cmp sposted,0 ; is a send outstanding now? je send1 ; e = no, go ahead push cx ; Timed test for old send being done mov ch,trans.rtime ; receive timeout other side wants mov cl,80h ; plus half a second shl cx,1 ; sending timeout * 512 send0: cmp sposted,0 ; is a send outstanding now? je send0a ; e = no, clean up and do send push cx ; save cx push ax ; and ax mov ax,2 ; wait 2 milliseconds call pcwait ; between retests pop ax pop cx ; loop counter loop send0 ; repeat test pop cx ; recover cx jmp send3a ; get here on timeout, can't send send0a: pop cx ; recover cx and proceed to send send1: cmp xmtcnt,0 ; number of items to send jne send1a ; ne = some clc ; else don't send null packets ret send1a: push cx ; save these regs push si push di push es push ds pop es ; set es to data segment mov si,offset xmtbufx ; external buffer mov di,offset xmtbuf ; copy for network packets mov cx,xmtcnt ; buffer length mov xmt.scb_length,cx ; tell buffer length shr cx,1 ; divide by two (words), set carry jnc send2 ; nc = even number of bytes movsb ; do single move send2: rep movsw ; copy the data pop es pop di pop si pop cx mov xmtcnt,0 ; say xmtbufx is available again mov xmt.scb_cmd,nsend+nowait ; send, don't wait for completion mov sposted,1 ; say send posted mov bx,offset xmt ; set pointer to scb call nbsession ; success or failure? cmp xmt.scb_err,0 ; good return? je send4 ; e = yes cmp xmt.scb_err,npending ; pending? je send4 ; e = yes cmp xmt.scb_err,18h ; session ended abnormally? jbe send3 ; e = yes, b = other normal errors push ax push dx ; another kind of error, show message mov ah,prstr mov dx,offset sndmsg ; say send failed int dos mov al,xmt.scb_err ; show error code call decout pop dx pop ax ; Error return send3: call nbclose ; close connection test flags.remflg,dserver ; server mode? jz send3a ; z = no call serini ; reinitialize it for new session send3a: stc ; set carry for failure to send ret send4: clc ret SEND ENDP ; NetBios Send packet completion interrupt routine. At entry CS is our ; code segment, es:bx points to scb, netbios stack, interrupts are off. SPOST PROC NEAR ; post routine for Send packets push ds push ax mov ax,data mov ds,ax mov sposted,0 ; clear send interlock pop ax pop ds iret SPOST ENDP ; TES block send. Destroys BX TESSND proc near mov bx,xmtcnt ; count of chars in buffer mov xmtbufx[bx],ah ; put char in buffer inc xmtcnt ; count of items in this buffer and ah,7fh ; strip parity cmp xmtcnt,length xmtbuf ; is buffer full now? jae tessen22 ; ae = buffer is full, send it now cmp ah,trans.seol ; end of packet? je tessen22 ; e = yes, send buffer test flowcnt,1 ; using output XON/XOFF flow control? jz tessen21 ; z = no cmp ah,flowon ; flow control? je tessen22 ; e = yes, always expedite cmp ah,flowoff ; ditto for flow off je tessen22 tessen21:cmp ttyact,0 ; are we in Connect mode? jne tessen22 ; ne = yes, send now clc ; e = no, wait for more before sending ret tessen22:push ax push cx push dx push di push es mov cx,xmtcnt ; number of chars jcxz tessnd4 ; don't send zero chars mov di,offset xmtbufx ; buffer address in es:di mov ax,data mov es,ax tessnd1:mov temp,0 ; retry counter tessnd2:mov ah,tesbwrite ; block write mov dx,tesport ; operational port int rs232 or ax,ax ; number of chars sent, zero? jnz tessnd3 ; nz = sent some mov ax,10 ; wait 10ms call pcwait inc temp ; count retry cmp temp,5 ; done all retries? jb tessnd2 ; b = no call tesclose ; close sessioin, declare failure stc jmp short tessnd5 ; exit failure tessnd3:cmp ax,cx ; check that all characters were sent je tessnd4 ; e = yes add di,ax ; point to remaining chars sub cx,ax ; count of remaining characters mov xmtcnt,cx ; need count in xmtcnt too jmp short tessnd1 ; try again to send tessnd4:clc ; success, need failure case too tessnd5:mov xmtcnt,0 pop es pop di pop dx pop cx pop ax ret TESSND endp ; Block send routine shared by many networks. ; Enter with char to be sent in AH. Destroys BX. ubsend proc near mov bx,xmtcnt ; count of chars in buffer mov xmtbufx[bx],ah ; put char in buffer inc xmtcnt ; count of items in this buffer and ah,parmsk ; strip parity test nettype,tcpnet ; TCP/IP Telnet? jz ubsen24 ; z = no cmp ah,CR ; carriage return? jne ubsen24 ; ne = no cmp xmtcnt,length xmtbuf ; is buffer full? jb ubsen22 ; b = no, else take special setps call ubsen28 ; send what we have now ubsen22:mov bx,xmtcnt xor al,al ; CR -> CR NUL push bx mov bx,tcpdata[24] ; tcpnewline offset cmp byte ptr [bx],0 ; newline mode is off? pop bx je ubsend23 ; e = yes mov al,LF ; CR -> CR/LF ubsend23:mov xmtbufx[bx],al ; append this char inc xmtcnt jmp short ubsen28 ; send buffer now ubsen24:cmp xmtcnt,length xmtbuf ; is buffer full now? jae ubsen28 ; ae = buffer is full, send it now cmp ah,trans.seol ; end of packet? je ubsen28 ; e = yes, send buffer test flowcnt,1 ; using output XON/XOFF flow control? jz ubsen25 ; z = no cmp ah,flowon ; flow control? je ubsen28 ; e = yes, always expedite cmp ah,flowoff ; ditto for flow off je ubsen28 ubsen25:cmp ttyact,0 ; are we in Connect mode? jne ubsen28 ; ne = yes, send now clc ; e = no, wait for more before sending ret ubsen28:push ax push cx push es mov cx,xmtcnt ; number of chars jcxz ubsend1 ; z = nothing to send mov bx,offset xmtbufx ; buffer address in es:bx ubsend2:mov ax,data mov es,ax test nettype,bapi+tcpnet ; 3Com BAPI or TCP Telnet? jz ubsend2a ; z = no mov ah,bapiwrit ; 3Com block write xor dh,dh ; session 0 test nettype,tcpnet ; TCP/IP Telnet? jz ubsend2d ; z = no call ktcpcom ; Far call TCP/IP Telnet code jmp short ubsend2e ubsend2d:int bapiint ubsend2e:cmp ah,3 ; status, no session and above jae ubsend2b ; ae = no session and above, fail jmp short ubsend3 ; process data ubsend2a:test nettype,telapi ; Novell TELAPI? jz ubsend2c ; z = no, Int 6Bh kind push si push bx ; preserve buffer offset mov si,bx ; use es:si for buffer address mov ah,telwrite mov bx,telses ; session number int rs232 pop bx pop si mov cx,ax ; TELAPI returns sent count in AX or ax,ax ; error response (sign bit set)? jns ubsend3 ; ns = no error ubsend2b:call ubclose ; failure, close the connection pop es pop cx pop ax stc ; failure ret ubsend2c:test nettype,netone ; UB? jz ubsend1 ; no, do nothing mov ax, nciwrit ; write function, port 0 [ohl] int netci ubsend3:cmp cx,xmtcnt ; check that all characters sent [ohl] je ubsend1 ; e = yes [ohl] add bx,cx ; point to remaining chars [ohl] sub xmtcnt,cx ; count of remaining characters [ohl] mov cx,xmtcnt ; need count in cx too jmp short ubsend2 ; try again to send [ohl] ubsend1:mov xmtcnt,0 pop es pop cx pop ax clc ; success, need failure case too ret ubsend endp ; Block send routine for Beame & Whiteside TCP ; Enter with char to be sent in AH. Destroys BX. [JRS] bwsend proc near test nettype,bwtcp ; active? jnz bwsend0 ; nz = yes stc ret bwsend0:mov bx,xmtcnt ; [JRS] count of chars in buffer mov xmtbufx[bx],ah ; [JRS] put char in buffer inc xmtcnt ; [JRS] count of items in this buffer and ah,7fh ; [JRS] strip parity cmp ah,CR ; [JRS] carriage return? jne bwsend1 ; [JRS] ne = no inc bx ; [JRS] xor al,al ; CR -> CR NUL push bx mov bx,tcpdata[24] ; tcpnewline offset cmp byte ptr [bx],0 ; newline mode is off? pop bx je bwsend0a ; e = yes mov al,LF ; CR -> CR/LF bwsend0a:call dopar ; [JRS] apply parity mov xmtbufx[bx],al ; [JRS] append this char inc xmtcnt ; [JRS] jmp short bwsend2 ; [JRS] bwsend1:cmp ttyact,0 ; [JRS] are we in Connect mode? jne bwsend2 ; [JRS] ne = yes, send now cmp xmtcnt,length xmtbuf-1 ; [JRS] is buffer full? (room for lf) jb bwsend3 ; [JRS] b = no, else take special step bwsend2:mov ah,40h ; [JRS] write to device mov bx,bwhandle ; [JRS] device handle mov cx,xmtcnt ; [JRS] number of bytes to write mov dx,offset xmtbufx ; [JRS] data buffer int dos ; [JRS] ask dos to send it jc bwsend4 ; c = failed mov xmtcnt,0 ; [JRS] clear the buffer bwsend3:clc ; [JRS] e = no, wait for more ret bwsend4:call bwclose ; failed to send, quit stc ret bwsend endp ; Dispatch prebuilt NetBios session scb, enter with bx pointing to scb. ; Returns status in al (and ah too). Allows STARLAN Int 2ah for netint. NBSESSION PROC NEAR push es ; save es around call mov ax,ds mov es,ax ; make es:bx point to scb in data seg mov ax,exnbios ; funct 4 execute netbios, for Int 2ah int netint ; use NetBios interrupt pop es ; saved registers ret ; exit with status in ax NBSESSION ENDP ; Start a TCP/IP Telnet session. Set nettype if successful. ; Uses sescur to determine new (-1) or old (0..MAXSESSIONS-1) session. ; Returns carry clear if success, else carry set. tcpstart proc near mov bx,sescur ; current session index for seslist or bx,bx ; non-negative means active jns tcpstar1 ; ns = active mov decbuf,0 ; ensure cmd line is cleared too call sesmgr ; init a fresh session mov sescur,bx ; get its index jmp short tcpstar2 ; start fresh session tcpstar1:mov al,seslist[bx] ; get the state value xor ah,ah or al,al ; is session active now? jns tcpstar3 ; ns = yes, else start fresh session tcpstar2:mov vtinited,0 ; MSY terminal emulation mov tekflg,0 ; clear all graphics mode material call ktcpopen ; open a new TCP connection jmp short tcpstar4 ; check status in AX tcpstar3:call ktcpswap ; switch to Telnet session in AL tcpstar4:or al,al ; Telnet status, successful? jns tcpstar5 ; ns = yes jmp tcpclose ; fail, close this failed session ; started/swapped sessions ok tcpstar5:mov bx,sescur ; current session, local basis mov seslist[bx],al ; update local session mgr with status push ax push si push di mov al,seshostlen ; length of name fields mul bl ; times number of entries add ax,offset sesname mov si,ax ; name of current host mov di,offset tcphost ; update main table call strcpy pop di pop si pop ax mov pcnet,2 ; net open and going or nettype,tcpnet ; say a session is active (ses = BL) clc ; success ret tcpstart endp ; Close/shutdown/terminate a TCP/IP Telnet session. Sescur is session ; number, -1 closes all sessions and TCP/IP. tcpclose proc near mov ax,sescur or ax,ax ; close active (>=0) or all (-1)? js tcpclo1 ; s = all (-1) mov bx,ax call termswapdel ; delete term save block for ses BX mov al,-1 ; session closed marker xchg al,seslist[bx] ; get tcpident from local list to AL or al,al ; is this Telnet session active? jns tcpclo1 ; ns = yes, close it xor bx,bx ; find a new active session mov cx,maxsessions ; number session slots tcpclo0:cmp seslist[bx],0 ; session status, active? jge tcpclo3a ; ge = yes, make this the active one inc bx loop tcpclo0 jmp short tcpclo4 ; no active sessions, quit tcpclo1:call ktcpclose ; AL = close this particular session or al,al ; status from ktcpclose jns tcpclo3 ; ns = have ses, -1 = no more sessions call ktcpclose ; close TCP/IP as a whole after last and nettype,not tcpnet ; clear activity flag mov cx,maxsessions ; clear all local table entries xor bx,bx tcpclo2:mov seslist[bx],-1 ; status is inactive push ax call termswapdel ; delete terminal save block pop ax inc bx loop tcpclo2 tcpclo3:call tcptoses ; convert next tcp ident AL to sescur tcpclo3a:mov sescur,bx ; next new session or bx,bx ; closing last session? js tcpclo4 ; s = yes, no more sessions call termswapin ; swap in next session's emulator mov port_tn.portrdy,0 ; say the comms port is not ready mov kbdflg,' ' ; stay in connect mode stc ret tcpclo4:mov port_tn.portrdy,0 ; say the comms port is not ready mov pcnet,0 ; say no network mov portin,0 ; reset the serial port for reiniting mov kbdflg,'C' ; quit connect mode stc ret tcpclose endp ; Make a NetBios virtual circuit Session, given preset scb's from proc chknet. ; For Server mode, does a Listen to '*', otherwise does a Call to indicated ; remote node. Updates vcid number in scb's. Shows success or fail msg. ; Updates network status byte pcnet to 2 if session is established. ; Does nothing if a session is active upon entry; otherwise, does a network ; hangup first to clear old session material from adapter board. This is ; the second procedure to call in initializing the network for usage. ; If success nettype is set to netbios and return is carry clear; else ; if failure nbclose is called to clean up connections and remove the nettype ; bit and return is carry set. SETNET PROC NEAR ; NetBios, make a connection cmp lposted,1 ; Listen pending? je setne0 ; e = yes, exit now cmp pcnet,1 ; session active? jbe setne1 ; be = no clc setne0: ret ; No Session setne1: test flags.remflg,dserver ; Server mode? jz setne2 ; z = no, file xfer or Connect ; Server mode, post a Listen (async) mov lsn.scb_rname,'*' ; accept anyone mov ax,500 call pcwait ; 0.5 sec wait or nettype,netbios ; set net type mov lposted,1 ; set listen interlock flag mov lsn.scb_cmd,nlisten+nowait ; do LISTEN command, no wait push bx ; save reg mov bx,offset lsn call nbsession pop bx clc ret setne2: ; Non-server (Client) mode cmp starlan,0 ; STARLAN? je setne2a ; e = no cmp xmt.scb_vrlen,0 ; yes, using long name support? je setne2a ; e = no push es ; save reg push ds pop es ; make es:bx point to xmt scb push bx ; save reg mov bx,offset xmt ; use xmt scb for the call mov xmt.scb_cmd,ncall ; CALL_ISN, vrname + vrlen are ready int 5bh ; STARLAN CALL Int 5bh, wait pop bx pop es ; restore regs jmp short setne3 ; finish up ; Regular Netbios Call setne2a:cmp flags.comflg,'O' ; Opennet network? (FGR) jne setne2b ; ne = no mov xmt.scb_rname+15,'v' ; fix name to use VT port under nameserver mov rcv.scb_rname+15,'v' setne2b:mov xmt.scb_cmd,ncall ; CALL, wait for answer push bx ; save reg mov bx,offset xmt ; setup scb pointer call nbsession pop bx ; restore register setne3: ; common Call completion, show status test xmt.scb_err,0ffh ; is there a non-zero return code? jnz setne3a ; nz = yes, do bad return or al,al ; check error return jnz setne3b ; nz = bad connection jmp short setne4 ; good connection so far ; We try twice to allow for R1, and R3 ; versions of the nameservers setne3b:cmp flags.comflg,'O' ; Opennet netnork? (FGR) jne setne3a ; ne = no mov xmt.scb_rname+15,' ' ; try generic port under nameserver mov rcv.scb_rname+15,' ' ; Regular Netbios Call mov xmt.scb_cmd,ncall ; CALL, wait for answer mov bx,offset xmt ; setup scb pointer call nbsession ; common Call completion, show status test xmt.scb_err,0ffh ; is there a non-zero return code? jnz setne3a ; nz = yes, do bad return or al,al ; check error return jz setne4 ; z = good connection so far setne3a:mov dx,offset nbadset ; say can't reach remote node mov ah,prstr int dos call saynode ; show remote host node name jmp setne4c ; keep results of Call (vcid) setne4: mov al,xmt.scb_vcid ; local session number mov rcv.scb_vcid,al ; for receiver too mov can.scb_vcid,al ; for sending Breaks mov pcnet,2 ; say session has started ; Here is the real difference between Opennet and generic Netbios. ; The Opennet Virtual Terminal Services exchange a small handshake at connect ; time. After that it is just normal Netbios data transfer between the host ; and Kermit. cmp flags.comflg,'O' ; Opennet netnork? (FGR) jne setne4o ; ne = no push si push di mov si,offset ivt1str ; protocol string "iVT1\0" mov di,offset xmtbufx ; buffer call strcpy ; copy asciiz string mov xmtcnt,5 ; length of asciiz string, for send pop di pop si call send ; send signon packet ; Note to Opennet purists: this just sends the handshake string to the host ; system without checking for an appropriate response. Basically, I am just ; very willing to talk to ANY VT server, and do the host response checking ; (if desired) in a Kermit script file (so its optional). setne4o:cmp flags.comflg,'E' ; ACSI version of EBIOS? jne setnet4p ; ne = no mov word ptr xmtbufx,6 ; internal word count mov xmtcnt,6 ; four bytes mov word ptr xmtbufx+2,acenable*256+3 ; raise DTR and RTS mov bx,portval mov ax,[bx].baud ; get baud rate index cmp al,0ffh ; unknown baud rate? jne setnet4pa ; ne = no mov ax,11 ; 2400,n,8,1 mov [bx].baud,ax ; set index into port info structure setnet4pa:shl ax,1 ; make a word index mov bx,ax mov ax,clbddat[bx] ; Bios style speed setting cmp al,0ffh ; unimplemented baud rate? jne setnet4pb ; ne = no mov bx,portval ; set index into port info structure mov [bx].baud,3 ; 110 baud -> 19200 for ACSI mov al,3 ; default to 19200,n,8,1 setnet4pb:mov ah,acsetmode ; ACSI cmd for Mode set mov word ptr xmtbufx+4,ax ; Mode setting or nettype,acsi ; set special net operation call send setnet4p: test flags.remflg,dregular+dquiet ; regular or quiet display? jnz setne4c ; nz = yes, show only no-connect msg mov dx,offset ngodset ; say good connection mov ah,prstr int dos call saynode ; show remote host name setne4c:cmp pcnet,1 ; check connection again ja setne5 ; a = good so far call nbclose ; shut down NetBios stc ; set carry for failure ret setne5: or nettype,netbios ; set net type clc ; carry clear for success ret SETNET ENDP saynode proc near ; display node name on screen, si=name ptr push ax push cx push dx push si mov ah,conout mov si,offset nambuf ; remote node string mov cx,64 ; up to 64 bytes long saynod1:cld lodsb ; get remote node name char into al mov dl,al int dos ; display it cmp al,' ' ; was it a space? jbe saynod2 ; be = yes, quit here loop saynod1 ; do all chars saynod2:mov ah,prstr mov dx,offset crlf int dos pop si pop dx pop cx pop ax ret saynode endp LPOST PROC FAR ; Interrupt Post routine for Listen call push ds ; update vcid and calling node name in scb's push cx push es push si push di mov cx,data ; reestablish data segment mov ds,cx mov es,cx mov si,offset lsn.scb_rname ; copy remote name to rcv and xmt scbs push si mov di,offset rcv.scb_rname mov cx,8 ; 16 byte field cld rep movsw mov cx,8 pop si push si mov di,offset xmt.scb_rname rep movsw mov cx,8 pop si mov di,offset nambuf ; and to nambuf for display rep movsw mov cl,lsn.scb_vcid ; local session number mov rcv.scb_vcid,cl mov xmt.scb_vcid,cl mov can.scb_vcid,cl mov lposted,0 ; clear interlock flag mov pcnet,2 ; say net ready due to a Listen pop di pop si pop es pop cx pop ds iret ; return from interrupt LPOST ENDP ; Close all network connections NETHANGUP PROC NEAR ; disconnect network session, keep names call ubclose ; close Ungermann Bass Int 6Bh class mov xmtcnt,0 call decclose ; close DECnet connection call telapiclose ; close Telapi session mov sescur,-1 ; say close all sessions, stop TCP/IP call tcpclose ; close internal TCP/IP sessions call ebiclose ; close EBIOS session call tesclose ; close TES session, ignore failures call nbclose ; close NetBios and ACSI call bwclose ; close BW TCP mov portin,0 ; reset the serial port for reiniting mov kbdflg,'C' ; quit connect mode clc ret NETHANGUP ENDP ; Close NetBios connection. Clears nettype of netbios nbclose proc near test nettype,(netbios+acsi) ; NetBios or ACSI active? jz nbclose2 ; z = no cmp pcnet,0 ; network started? je nbclose2 ; e = no test nettype,acsi ; ACSI? jz nbclose1 ; z = no mov word ptr xmtbufx,4 ; four bytes mov word ptr xmtbufx+2,acdisable*256 ; drop all modem leads mov xmtcnt,4 ; four bytes call send ; tell the server mov ax,500 ; wait 0.5 sec call pcwait ; for pkt to reach host nbclose1:push bx ; NetBios network mov bx,offset can mov can.scb_cmd,ncancel ; set cancel op code mov can.scb_baddr,offset lsn ; cancel listens mov lposted,0 ; say no listen call nbsession mov can.scb_baddr,offset rcv ; cancel receives call nbsession mov rposted,0 ; say no receives posted mov can.scb_baddr,offset xmt ; cancel sends call nbsession mov sposted,0 ; say no sends posted mov xmtcnt,0 ; reset output buffer counter mov xmt.scb_cmd,nhangup ; hangup, and wait for completion mov bx,offset xmt call nbsession pop bx and nettype,not (netbios+acsi) mov pcnet,1 ; net but no connection mov port_nb.portrdy,0 ; say the comms port is not ready mov portin,0 mov kbdflg,'C' ; quit connect mode stc nbclose2:ret nbclose endp decclose proc near test nettype,declat ; DECnet LAT active? jz decclos3 ; z = no mov dx,lathand ; LAT handle or dx,dx ; invalid handle? jz decclos2 ; z = yes mov ax,latclose int latint mov ax,latseg ; allocated memory segment or ax,ax ; was it used? jz decclos1 ; z = no push es mov es,ax mov ah,freemem ; free allocated memory segment @ES int dos ; free the block pop es mov latseg,0 ; clear remembered segment address mov word ptr latscbptr+2,0 ; clear this pointer (same as latseg) decclos1:cmp latversion,4 ; version 4? jb decclos2 ; b = no push es les bx,latscbptr+4 ; address of exterior SCB mov dx,lathand mov ax,latscbfree ; free SCB interior to LAT int latint mov word ptr latscbptr+2,0 pop es decclos2:and nettype,not declat ; remove net type bit mov lathand,0 ; invalidate the handle decclos3:test nettype,decnet ; DEC CTERM active? jz decclos4 ; z = no mov dx,decneth ; DECnet CTERM handle or dx,dx ; invalid handle? jz decclos5 ; z = yes mov ax,dclose ; CTERM close int decint mov decneth,0 ; invalidate the handle mov ax,decseg ; allocated memory segment or ax,ax ; ever used? jz decclos4 ; z = no mov es,ax mov ah,freemem ; free allocated memory segment @ES int dos ; free the block mov decseg,0 ; clear remembered segment address decclos4:and nettype,not decnet ; remove net type bit mov port_dec.portrdy,0 ; say port is not ready mov pcnet,0 ; say no network mov portin,0 mov kbdflg,'C' ; quit connect mode stc decclos5:ret decclose endp telapiclose proc near test nettype,telapi ; Novell TELAPI? jz telapiclo1 ; e = no mov xmtcnt,0 push bx mov bx,telses ; session number mov ah,telclose ; close session int rs232 pop bx and nettype,not telapi ; remove active net type bit mov portin,0 mov pcnet,1 push bx mov bx,portval mov [bx].portrdy,0 ; say port is not ready pop bx mov kbdflg,'C' ; quit connect mode stc telapiclo1:ret telapiclose endp ; Close EBIOS communications link ebiclose proc near test nettype,ebios ; EBIOS? jz ebiclos1 ; z = no mov dx,ebport ; EBIOS mov ax,ebmodem*256+0 ; reset outgoing DTR and RTS leads int rs232 push es mov bx,ds mov es,bx mov bx,offset ebcoms ; es:bx is parameter block ebcoms mov ah,ebredir ; do redirect away from EBIOS mov ebcoms+1,0 ; set port to hardware int rs232 mov dx,ebport ; port 0..3 mov bx,offset rcvbuf ; receive buffer for EBIOS xor cx,cx ; set to zero to stop buffering mov ax,ebbufset*256+2 ; reset rcvr buffered mode int rs232 xor cx,cx mov bx,offset xmtbuf ; EBIOS transmitter work buffer mov ax,ebbufset*256+1 ; reset xmtr buffered mode int rs232 pop es mov bx,offset portb1 ; use Bios data structure mov ax,type prtinfo ; portinfo item size mul dl ; times actual port (0..3) add bx,ax ; new portb offset mov [bx].portrdy,0 ; say port is not ready and nettype,not ebios mov portin,0 mov kbdflg,'C' ; quit connect mode stc ebiclos1:ret ebiclose endp ; TES close session tesclose proc near test nettype,tes ; TES? jz tesclo3 ; z = no mov temp,0 ; retry counter call tesstate ; get session state to AH test ah,2 ; is this session active? jz tesclo2 ; z = no, but keep held sessions mov ah,tesdrop ; drop a session mov al,tesses ; the session call tes_service or ah,ah ; status jz tesclo2 ; z = success stc ; say failure ret tesclo2:and nettype,not tes ; successful hangup mov tesses,0 ; clear session mov port_tes.portrdy,0 ; say the comms port is not ready mov pcnet,1 ; say network but no session mov portin,0 mov kbdflg,'C' ; quit connect mode stc ret tesclo3:clc ret tesclose endp ; Ungermann Bass. Do a disconnect from the current connection. ubclose proc near push ax push cx test nettype,netone ; UB network has been activated? jz ubclos4 ; z = no mov ax,ncistat ; get status [ohl] int netci or ch,ch ; check if we have a connection [ohl] jz ubclos2 ; z = no [ohl] mov ax,ncicont ; control function [ohl] mov cx,ncidis ; say disconnect [ohl] int netci ubclos1:call ubrecv ; read response from net cmdintpr[ohl] jnc ubclos1 ; continue till no chars [ohl] mov ax,ncistat ; get status again int netci or ch,ch ; check if we have a connection jnz ubclos3 ; nz = yes, had more than one ubclos2:and nettype,not netone ; remove network type mov pcnet,1 ; net but no connection mov port_ub.portrdy,0 ; say the comms port is not ready mov portin,0 mov kbdflg,'C' ; quit connect mode stc ubclos3:pop cx pop ax ret ubclos4:test nettype,bapi+tcpnet ; 3Com BAPI or TCP Telnet in use? jz ubclos6 ; z = no mov ah,bapieecm ; control Enter Command Mode char mov al,1 ; enable it test nettype,tcpnet ; TCP/IP Telnet? jz ubclos5 ; z = no call tcpclose ; tell Telnet to close current session jmp short ubclos3 ubclos5:int bapiint jmp short ubclos3 ubclos6:test nettype,telapi ; Novell TELAPI Int 6Bh interface? jz ubclos3 ; z = no call telapiclose jmp short ubclos3 ubclose endp ; Ungermann Bass/Novell. Put current connection on Hold. Requires keyboard ; verb \knethold to activate. Should return to Connect mode to see NASI. [jrd] ubhold proc near push ax push cx test nettype,netone ; UB/Novell network active? jz ubhold1 ; z = no mov ax,ncistat ; get link status int netci or ch,ch ; connection active? jz ubhold1 ; z = no mov ax,ncicont ; control command mov cl,ncihld ; place circuit on HOLD int netci jmp short ubhold3 ubhold1:test nettype,bapi ; 3Com BAPI jz ubhold2 ; z = no mov ah,bapiecm ; do Enter Command Mode char ubhold1b:int bapiint jmp short ubhold3 ubhold2:test nettype,tes ; TES? jz ubhold3 ; z = no mov ah,testalk ; TES get command interpreter mov dx,tesport ; "serial port" int rs232 ubhold3:pop cx pop dx clc ret ubhold endp ; Beame & Whiteside TCP close session [JRS] bwclose proc near ; [JRS] mov bx,bwhandle ; [JRS] get file handle or bx,bx ; [JRS] if zero, we're done jz bwclos1 ; [JRS] z= done mov ah,close2 ; [JRS] close device int dos ; [JRS] mov bwhandle,0 ; [JRS] clear the handle value bwclos1:and nettype,not bwtcp mov portin,0 ; say serial port is closed mov pcnet,0 mov port_tn.portrdy,0 ; say port is not ready mov kbdflg,'C' ; quit connect mode clc ; [JRS] flag success ret bwclose endp ; Called when Kermit exits. Name passed to mssker by initialization lclini ; in word lclexit. NETCLOSE PROC NEAR ; close entire network connection call nethangup ; close connections push bx mov bx,offset xmt cmp xmt.scb_lname,' ' ; any local name? je netclo2 ; e = none mov xmt.scb_cmd,ndelete ; delete our local Kermit name call nbsession ; from net adapter board mov xmt.scb_lname,' ' ; clear name netclo2:pop bx mov pcnet,0 ; say no network mov lnamestat,0 ; local name not present, inactive mov port_nb.portrdy,0 ; say comms port is not ready and nettype,not (netbios+acsi) ; remove network kind netclo1:clc ret NETCLOSE ENDP ; Start connection process to network. Obtains Network board local name ; and appends '.K' to form Kermit's local name (removed when Kermit exits). ; If no local name is present then use name 'mskermit.K'. ; Sets local name in scb's for xmt, rcv, lsn. (Does not need DOS 3.x) ; Sets NETDONE pointer to procedure netclose for Kermit exit. ; Verifies existance of interrupt 5ch support, verifies vendor specific ; support for BREAK and other features, sets network type bit in nettype, ; sets BREAK support in nsbrk, hangsup old session if new node name given, ; fills in local and remote node names and name number in scbs (including ISN ; names for STARLAN), and sets network status byte pcnet to 0 (no net) or ; to 1 (net ready). This is the first procedure called to init network usage. ; Byte count of new host name is in temp from COMS. chknet proc near cmp flags.comflg,'U' ; Ungermann Bass network? jb chknea ; b = no, (ae includes U and W) mov pcnet,0 ; force reactivation of UB net chknea: cmp pcnet,2 ; session active now? jb chknec ; b = no cmp newnambuf,0 ; non-zero if new destination name je chkneb ; e = none, resume old session call chknew ; Resume current session? jnc chkneb ; nc = no chknex: ret ; resume old one chkneb: jmp chknet1 ; skip presence tests chknec: ; setup addresses and clear junk in scb's cmp pcnet,0 ; have we been here already? je chkned ; e = no jmp chknet1 ; yes, skip init part chkned: mov xmtcnt,0 ; say buffer is empty mov nsbrk,0 ; assume no BREAK across network and nettype,not netbios ; say no NetBios network yet mov starlan,0 ; no Starlan yet call chknetbios ; is Netbios present? jc chknet0 ; c = not present or nettype,netbios ; say have NetBios network call chkstarlan ; is AT&T StarLAN present? jc chknet1 ; c = no inc starlan ; say using STARLAN, have int 2ah mov nsbrk,1 ; network BREAK supported jmp short chknet1 chknet0:mov pcnet,0 ; no network yet push dx mov ah,prstr mov dx,offset nonetmsg ; say network is not available int dos pop dx stc ; set carry for failure ret ; and exit now ; net ready to operate chknet1:mov port_nb.portrdy,1 ; say the comms port is ready cmp newnambuf,0 ; non-zero if new destination name jne chkne1e ; ne = new name given jmp chknet2 ; nothing, so leave names intact chkne1e:cmp pcnet,2 ; is session active now? jb chkne1d ; b = no call nbclose ; close to clear old connection chkne1d:push si ; start fresh connection push di push es push ds pop es ; make es:di point to data segment cld mov cx,8 ; 16 bytes for a node name mov ax,' ' ; first, fill with spaces mov di,offset xmt.scb_rname ; remote name field, clear it rep stosw cmp starlan,0 ; STARLAN? jne chkne1b ; ne = no ; begin STARLAN section mov xmt.scb_vrname,0 ; STARLAN var length name ptr mov xmt.scb_vrname+2,0 ; segement of name mov xmt.scb_vrlen,0 ; and its length mov di,offset nambuf ; source of text mov dx,di call strlen ; length of new name to cx cmp cx,16 ; > 16 chars in remote node name? ja chkne1a ; a = yes, too long for Netbios mov al,'/' ; scan for slashes in name cld repne scasb ; look for the slash jne chkne1b ; ne = none, do regular Netbios name storage chkne1a: ; STARLAN ISN long remote name support mov dx,offset nambuf ; STARLAN var length name ptr mov xmt.scb_vrname,dx mov xmt.scb_vrname+2,data ; segment of remote name call strlen ; get name length again (in cx) mov xmt.scb_vrlen,cl ; indicate its length jmp short chkne1c ; copy blanks in remote name field ; end STARLAN section chkne1b: ; Regular Netbios form mov si,offset nambuf ; source of text mov dx,si call strlen ; length to cx cmp cx,16 jbe chkne1f ; be = in bounds mov cx,16 ; chop to 16 (prespace filled above) chkne1f:mov di,offset xmt.scb_rname ; destination is remote name rep movsb ; copy text to transmitter's scb chkne1c:mov cx,8 ; 8 words mov si,offset xmt.scb_rname ; from here mov di,offset rcv.scb_rname ; to receiver's scb also rep movsw pop es pop di pop si mov newnambuf,0 ; say new name is established now chknet2:cmp pcnet,0 ; started net? je chknet2c ; e = no clc ret ; else quit here chknet2c:call setnbname ; establish local Netbios name jnc chknet9 ; nc = success ret chknet9:mov pcnet,1 ; network is present (but not active) mov al,xmt.scb_num ; name number mov rcv.scb_num,al mov lsn.scb_num,al push es push si push di mov si,ds mov es,si mov si,offset xmt.scb_lname mov di,offset rcv.scb_lname ; put in receiver scb too mov cx,8 rep movsw mov cx,8 mov si,offset xmt.scb_lname mov di,offset lsn.scb_lname ; in Listen scb also rep movsw pop si pop di pop es clc ret chknet endp ; Service SET NETBIOS-NAME name command at Kermit prompt level setnbios proc near mov dx,offset decbuf ; work buffer mov bx,offset setnbhlp ; help mov ah,cmword ; get netbios name call comnd jc setnb3 ; c = failure push ax ; save char count mov ah,cmeol ; get a confirmation call comnd pop ax jc setnb3 ; c = failure cmp lnamestat,2 ; is name fixed already? je setnb2 ; e = yes mov cx,ax ; char count jcxz setnb3 ; z = enter no new name cmp cx,16 ; too long? jbe setnb1 ; be = no mov cx,16 ; truncate to 16 chars setnb1: mov si,offset decbuf ; work buffer mov di,offset deflname ; default name push es mov ax,ds mov es,ax cld rep movsb ; copy the name mov al,' ' ; pad with spaces mov cx,offset deflname+16 ; stopping place+1 sub cx,di ; number of spaces to write rep stosb ; won't do anything if cx == 0 pop es mov lnamestat,1 ; say have new local name call setnbname ; do the real NetBios resolution ret ; returns carry set or clear setnb2: mov ah,prstr mov dx,offset setnbad ; say name is fixed already int dos setnb3: stc ; failure ret setnbios endp chknetbios proc near ; Test for Netbios presence, IBM way push es mov ah,35h ; DOS get interrupt vector mov al,netint ; the netbios vector int dos ; returns vector in es:bx mov ax,es or ax,ax ; undefined interrupt? jz chknb1 ; z = yes cmp byte ptr es:[bx],0cfh ; points at IRET? je chknb1 ; e = yes mov xmt.scb_cmd,7fh ; presence test, 7fh is illegal command code mov xmt.scb_err,0 ; clear response field push bx mov bx,offset xmt ; address of the session control block call nbsession ; execute operation pop bx mov al,xmt.scb_err ; get response cmp al,3 ; 'illegal function', so adapter is ready je chknb1 ; e = success or al,al jnz chknb2 ; nz = not "good response" either chknb1: pop es clc ; netbios is present ret chknb2: pop es stc ; netbios is not present ret chknetbios endp chkstarlan proc near ; AT&T STARLAN board check push es mov ah,35h ; DOS get interrupt vector mov al,2ah ; PC net vector 2ah int dos ; returns vector in es:bx mov ax,es or ax,ax ; undefined interrupt? jz chkstar1 ; z = yes cmp byte ptr es:[bx],0cfh ; points at IRET? je chkstar1 ; e = yes xor ah,ah ; vendor installation check on int 2ah xor al,al ; do error retry int 2ah ; session level interrupt cmp ah,0ddh ; 0ddh = magic number, success? jne chkstar1 ; ne = no ; Test for vector mov ah,35h ; DOS get interrupt vector mov al,5bh ; 5bh = STARLAN netbios ext'd vector int dos ; returns vector in es:bx mov ax,es or ax,ax ; undefined interrupt? jz chkstar1 ; z = yes cmp byte ptr es:[bx],0cfh ; points to IRET? je chkstar1 ; e = yes pop es clc ; StarLAN is present ret chkstar1:pop es stc ; StarLAN is not present ret chkstarlan endp ; Put a local name into the Netbios name table, ask user if conflicts. setnbname proc near cmp lnamestat,2 ; validiated local Netbios name? jb setnbn1 ; b = no ret ; else quit here setnbn1:call chknetbios ; Netbios presence check jnc setnbn1a ; nc = present ret setnbn1a:mov ah,prstr mov dx,offset netmsg1 ; say checking node name int dos push word ptr xmt.scb_rname ; save first two bytes (user spec) mov byte ptr xmt.scb_rname,'*' ; call to local name push bx mov xmt.scb_cmd,naustat ; get Network Adapter Unit status mov bx,offset xmt call nbsession pop bx pop word ptr xmt.scb_rname ; restore remote name first two bytes setnbn2:push es push si push di mov si,ds mov es,si cld cmp lnamestat,0 ; local name specified? jne setnbn3 ; ne = yes mov si,offset xmtbuf+60 ; where local name is returned (1st entry) cmp word ptr xmtbuf+58,0 ; is local name empty? jne setnbn4 ; ne = no, use name from table setnbn3:mov si,offset deflname ; else use default local name setnbn4:mov di,offset xmt.scb_lname ; where to put it in scb mov cx,14 ; 16 bytes minus extension of '.K' cld ; append extension of '.K' to loc name setnbn5:cmp byte ptr[si],' ' ; find first space (end of regular node name) jbe setnbn6 ; be = found one (or control code) movsb ; copy local name to scb loop setnbn5 ; continue though local name setnbn6:cmp word ptr [di-2],'K.' ; is extension '.K' present already? je setnbn7 ; e = yes, nothing to add cmp word ptr [di-2],'k.' ; check lower case too je setnbn7 ; e = yes, nothing to add mov word ptr [di],'K.' ; append our extension of '.K' add di,2 ; step over our new extension sub cx,2 ; complete field with spaces setnbn7:add cx,2 ; 15th and 16th chars mov al,' ' ; space as padding rep stosb pop di ; clean stack from work above pop si pop es push bx ; Put our new local name in NAU mov xmt.scb_cmd,nadd ; ADD NAME, wait mov bx,offset xmt call nbsession pop bx mov al,xmt.scb_err ; get error code or al,al ; success? jnz setnbn8 ; nz = no jmp setnbn12 ; success setnbn8:cmp al,0dh ; duplicate name in local table? je setnbn9 ; e = yes cmp al,16h ; name used elsewhere? je setnbn9 ; e = yes cmp al,19h ; name conflict? je setnbn9 ; e = yes push ax mov ah,prstr ; another kind of error mov dx,offset chkmsg1 ; say can't construct local name int dos pop ax call decout ; display it (in al) mov ah,prstr mov dx,offset crlf int dos stc ; set carry for failure ret setnbn9:mov ah,prstr ; ask for another name mov dx,offset chkmsg2 ; prompt message int dos mov ah,conout ; show name itself push si push cx mov cx,16 ; 16 bytes in name field mov si,offset xmt.scb_lname setnbn10:lodsb ; get name char into al mov dl,al int dos mov byte ptr[si-1],' ' ; clear old name as we go loop setnbn10 pop cx pop si mov ah,prstr mov dx,offset chkmsg3 ; rest of prompt int dos mov ah,0ah ; read buffered line from stdin mov dx,offset xmtbuf+58 ; where to put text (xmtbuf+60=text) mov xmtbuf+58,15 ; buf capacity, including cr at end mov xmtbuf+59,0 ; say text in buffer = none int dos jc setnbn11 ; c = error cmp xmtbuf+59,0 ; any bytes read? je setnbn11 ; e = no, exit failure mov ah,prstr ; say rechecking name mov dx,offset netmsg1 int dos push es mov si,ds mov es,si mov si,offset xmtbuf+60 ; where text went mov di,offset deflname ; where local name is stored mov cx,8 cld rep movsw ; copy 14 chars to deflname mov byte ptr [di],0 ; null terminator, to be safe pop es mov lnamestat,1 ; say local name specified jmp setnbn2 ; go reinterpret name setnbn11:stc ; set carry for failure ret setnbn12:mov dx,offset netmsg2 ; say net is going mov ah,prstr int dos push si push di push es mov si,ds mov es,si mov si,offset xmt.scb_lname ; display our local name mov di,offset deflname ; local Netbios name mov ah,conout mov cx,16 cld setnbn13:lodsb ; byte from si to al stosb ; and store in local Netbios name mov dl,al int dos ; display it loop setnbn13 pop es pop di pop si mov lnamestat,2 ; say local name is fixed now mov ah,prstr mov dx,offset crlf ; add cr/lf int dos clc ; carry clear for success ret setnbname endp ; Network session exists. Tell user and ask for new node or Resume. ; Returns carry set if Resume response, else carry clear for New. chknew proc near mov ax,takadr ; we could be in a macro or Take file push ax ; save Take address mov al,taklev xor ah,ah push ax ; and Take level push dx mov dx,size takinfo ; bytes for each current Take mul dx ; times number of active Take/macros pop dx sub takadr,ax ; clear Take address as if no mov taklev,0 ; Take/macro were active so that mov dx,offset naskpmt ; prompt for New or Resume call prompt mov dx,offset nettab ; table of answers xor bx,bx ; help for the question mov ah,cmkey ; get answer keyword mov comand.cmcr,1 ; allow bare CR's call comnd mov comand.cmcr,0 ; dis-allow bare CR's jc chknew1 ; c = failure, means Resume push bx mov ah,cmeol ; get a confirm call comnd pop bx jc chknew1 ; c = failure, resume session or bx,bx ; 0 for new? jz chknew1 ; z = yes, return carry clear stc ; set carry for resume chknew1:pop ax mov taklev,al ; restore Take level pop takadr ; restore Take address ret ; carry may be set chknew endp ; ; [ohl] ++++ ; Verifies existance of interrupt 6Bh support, verifies vendor specific ; support for BREAK and other features, sets network type bit in nettype, ; sets BREAK support in nsbrk and sets network status byte pcnet to 0 ; (no net) or to 1 (net ready). This is the first procedure called to ; init Ungermann-Bass NETCI terminal port network usage. chkub proc near push bx push es ; Test for vector mov ah,35h ; DOS get interrupt vector mov al,6bh ; 6bh = Net/One command interpreter ; interface, with break support int dos ; returns vector in es:bx mov ax,es ; is vector in rom bios? or ax,ax ; undefined vector? jz chkub0 ; z = yes cmp byte ptr es:[bx],0cfh ; points at IRET? je chkub0 ; e = yes ;some mov al,0ffh ; test value (anything non-zero) ;emulators mov ah,2 ; function code for testing net board ;flunk int netci ;this or al,al ; al = 0 means board is ok ;test jnz chkub0 ; nz = not ok pop es pop bx mov nsbrk,1 ; network BREAK supported or nettype,netone ; say have Net/One clc ; return success ret chkub0: pop es ; clean stack from above pop bx push ax push dx mov ah,prstr mov dx,offset nonetmsg ; say network is not available int dos pop dx pop ax stc ; set carry for failure ret ; and exit now chkub endp ; local routine to see if we have to transmit an xon chkxon proc near test flowcnt,1+4 ; doing output/RTS flow control? jz chkxo1 ; z = no, skip all this test xofsnt,usron ; did user send an xoff? jnz chkxo1 ; nz = yes, don't contradict it here test xofsnt,bufon ; have we sent a buffer level xoff? jz chkxo1 ; z = no, forget it cmp count,mntrgl ; below (low water mark) trigger? jae chkxo1 ; no, forget it test flowcnt,4 ; using RTS/CTS kind? jz chkxo2 ; z = no cmp flags.comflg,4 ; using uart? ja chkxo1 ; a = no, ignore situation push ax push dx mov dx,modem.mddat ; serial port base address add dx,4 ; increment to control register in al,dx or al,2 ; assert RTS for flow-on push ax in al,ppi_port ; delay pop ax out dx,al and xofsnt,off ; remember we've sent the "xon" pop dx pop ax ; do software flow control too chkxo2: test flowcnt,1 ; using outgoing XON/XOFF kind? jz chkxo1 ; z = no mov ah,flowon ; ah gets xon and xofsnt,off ; remember we've sent the xon call outch2 ; send via non-flow controlled entry point chkxo1: ret chkxon endp ; IHOSTS - Initialize the host by sending XOFF, or equivalent. ; Requires that the port be initialized before hand. ; Do not send flow control if doing half duplex. IHOSTS PROC NEAR push ax ; save the registers push bx push cx push dx mov xofrcv,off ; clear old xoff received flag mov xofsnt,off ; and old xoff sent flag cmp portin,0 ; is a comms port active? jle ihosts1 ; le = no mov bx,portval cmp flowcnt,4 ; using CTS/RTS? je ihosts2 ; e = yes mov ah,byte ptr [bx].flowc ; put wait flow control char in ah or ah,ah ; check for null char jz ihosts1 ; z = null, don't send it cmp dupflg,0 ; full duplex? jne ihosts1 ; ne = no, half call outchr ; send it jmp short ihosts1 ihosts2:cmp flags.comflg,4 ; using uart? ja ihosts1 ; a = no, ignore situation mov dx,modem.mddat ; serial port base address add dx,4 ; increment to control register in al,dx and al,not 2 ; clear RTS for flow-off push ax in al,ppi_port ; delay pop ax out dx,al or xofsnt,bufon ; remember we've sent the "xoff" ihosts1:pop dx pop cx pop bx pop ax ret IHOSTS ENDP ; IHOSTR - initialize the remote host for our reception of a file by ; sending the flow-on character (XON typically) to release any held ; data. Do not send flow control if doing half duplex. IHOSTR PROC NEAR push ax ; save regs push bx push cx mov xofrcv,off ; clear old xoff received flag mov xofsnt,off ; and old xoff sent flag cmp portin,0 ; is a comms port active? jle ihostr1 ; le = no mov bx,portval cmp flowcnt,4 ; using CTS/RTS? je ihostr2 ; e = yes mov ah,byte ptr [bx].flowc+1; put go-ahead flow control char in ah or ah,ah ; check for null char jz ihostr1 ; z = null, don't send it cmp dupflg,0 ; full duplex? jne ihostr1 ; ne = no, half call outchr ; send it (release Host's output queue) jmp short ihostr1 ihostr2:cmp flags.comflg,4 ; using uart? ja ihostr1 ; a = no, ignore situation push dx mov dx,modem.mddat ; serial port base address add dx,4 ; increment to control register in al,dx or al,2 ; assert RTS for flow-on push ax in al,ppi_port ; delay pop ax out dx,al and xofsnt,off ; remember we've sent the "xon" pop dx ihostr1:pop cx pop bx pop ax ret IHOSTR ENDP ; Send a break out the current serial port. Returns normally. ; Do both regular and long Break. ; Networks use flags.comflg so that more than one net can be active SENDBR PROC NEAR push cx ; Regular Break entry point mov cx,275 ; 275 milliseconds in regular Break call sendbw ; call worker routine to do it pop cx mov flags.cxzflg,0 ; clear in case Control-Break clc ; don't exit Connect mode ret SENDBL: push cx ; Long Break entry point mov cx,1800 ; 1.8 second long break call sendbw ; call worker routine to do it pop cx mov flags.cxzflg,0 ; clear in case Control-Break clc ; don't exit Connect mode ret ; worker - send Break for cx millisec sendbw: mov al,flags.comflg ; get type of port cmp al,4 ; running on a UART or network? ja sendbw2 ; a = yes push dx ; UART BREAK mov dx,modem.mdcom ; port address in al,dx ; get current setting push ax ; save setting on the stack or al,brkbit ; set send-break bit(s) out dx,al ; start the break mov ax,cx ; # of ms to wait call pcwait ; hold break for desired interval pop ax ; restore Line Control Register out dx,al ; stop the break pop ax ret sendbw2:cmp al,'N' ; is this a NetBios network port? jne sendbw3 ; ne = no cmp starlan,0 ; STARLAN: network break supported? jne sendbw2a ; ne = no push bx push es ; save es around call push ds pop es ; make es:bx point to scb in data segment mov bx,offset can ; use Cancel control block mov can.scb_cmd,netbrk ; send net Break command int 5bh ; use network Break interrupt pop es ; saved registers pop bx sendbw2a:ret sendbw3:cmp al,'E' ; EBIOS? jne sendbw6 ; ne = no test nettype,acsi ; using EBIOS.COM? jnz sendbw4 ; nz = no push ax push dx mov dx,ebport ; port 0..3 mov ah,ebbreak ; EBIOS send BREAK int rs232 ; bios send pop dx pop ax ret sendbw4:call send ; send current buffer first mov word ptr xmtbufx,4 ; four bytes in packet mov word ptr xmtbufx+2,acbreak*256+0 ; BREAK cmd, null char call send ; send the command ret sendbw6:cmp al,'U' ; UB NETCI or Novell NASI/NACS? je sendbw6a ; e = yes cmp al,'W' ; NASI/NACS? jne sendbw7 ; ne = no sendbw6a:push cx ; UB port send break [ohl] mov ax,ncicont+0 ; call control, use 0 for network port num mov cl,ncibrk ; request break [ohl] int netci ; Net/One command interface int. (6Bh) [ohl] pop cx ret sendbw7:cmp al,'D' ; DECnet? jne sendbw9 ; ne = no test nettype,declat ; LAT? jz sendbw9 ; z = no, CTERM cannot send a BREAK mov ax,latbreak ; LAT BREAK command push dx mov dx,lathand ; LAT handle int latint pop dx ret sendbw9:cmp al,'C' ; 3Com BAPI or TCP Telnet? je sendbw9a ; e = yes cmp al,'t' jne sendbw10 ; ne = no sendbw9a:mov ah,bapibrk ; BAPI, send BREAK xor dh,dh ; session id of 0 (external sessions) cmp al,'t' ; TCP/IP Telnet? jne sendbw9b ; ne = no call ktcpcom ; Far call TCP/IP Telnet code ret sendbw9b:int bapiint ret sendbw10:cmp al,'T' ; Novell TELAPI? jne sendbw11 ; ne = no mov ah,255 ; Telnet Interpret As Command char call outchr ; send it mov ah,244 ; Telnet Interrupt Process char call outchr ; send it ret sendbw11:cmp al,'I' ; TES? jne sendbw12 ; ne = no cmp teslat,0 ; using LAT? je sendbw11a ; e = no, older TES mov ax,latbreak ; LAT BREAK command push dx mov dx,lathand ; LAT handle int latint pop dx ret sendbw11a:mov ah,testalk ; get command interpreter mov dx,tesport int rs232 sendbw12:ret SENDBR ENDP ; Initialization for using serial port. This routine performs ; any initialization necessary for using the serial port, including ; setting up interrupt routines, setting buffer pointers, etc. ; Doing this twice in a row should be harmless (this version checks ; a flag and returns if initialization has already been done). ; SERRST below should restore any interrupt vectors that this changes. ; ; Revised slightly by Joe R. Doupnik 22 Dec 1985 to prevent interrupts ; being enabled until we're done, to stop interrupts from occurring when ; TX holding buffer becomes empty (a useless interrupt for us), and to ; shorten the time between enabling interrupts and our exit. ; Returns carry clear if success, else carry set. ; 9 July 1989 Add support for 16550/A 14 char receiver fifo. SERINI PROC NEAR call pcwtst ; recalibrate pcwait loop timer cmp portin,0 ; did we initialize port already? je serin4 ; e = yes jl serin3 ; l = no, not yet jmp serin30 ; yes, update flow and leave serin3: mov bl,flags.comflg ; pass current port ident mov portin,0 ; say have been here once call comstrt ; do SET PORT now jnc serin4 ; nc = success ret ; failed, exit now serin4: push bx mov bx,portval mov bl,[bx].duplex ; get full/half duplex flag, local cpy mov dupflg,bl pop bx cmp flags.comflg,4 ; UART? jbe serin5 ; be = yes, real thing jmp serin8 ; else try other port kinds serin5: push bx push es mov dx,modem.mdmintc ; interrupt controller inc dx ; look at interrupt mask in al,dx ; get interrupt mask mov savirq,al ; save state here for restoration or al,modem.mddis ; inhibit our IRQ out dx,al mov al,byte ptr modem.mdintv ; desired interrupt vector mov ah,35H ; Int 21H, function 35H = Get Vector int dos ; get vector into es:bx mov word ptr savsci,bx ; save address offset of original vector mov word ptr savsci+2,es ; and its segment mov al,byte ptr modem.mdintv ; interrupt number for IRQ mov dx,offset serint ; offset of our interrupt routine push ds ; save ds around next DOS call mov bx,seg serint ; compose full address of our routine mov ds,bx ; segment is the code segment mov ah,setintv ; set interrupt address from ds:dx int dos pop ds mov al,rs232 ; interrupt number for Bios serial port mov ah,getintv ; get vector into es:bx int dos mov word ptr sav232,bx ; save offset mov word ptr sav232+2,es ; save segment mov dx,offset serdum ; offset of our interrupt routine push ds ; save ds around next DOS call mov bx,seg serdum ; compose full address of our routine mov ds,bx ; segment is the code segment mov ah,setintv ; set interrupt address from ds:dx int dos pop ds pop es pop bx mov portin,1 ; Remember port has been initialized mov ax,modem.mdstat mov mst,ax ; Use this address for status mov ax,modem.mddat mov mdat,ax ; Use this address for data mov ax,modem.mdiir mov miir,ax ; uart interrupt ident register cli ; Disable interrupts cld ; Do increments in string operations mov al,modem.mdmeoi mov mdeoi,al ; Use to signify end-of-interrupt mov dx,modem.mdmintc ; interrupt controller cntl address mov mdintc,dx inc dx ; access OCW1, interrupt mask byte in al,dx ; get 8259 interrupt mask and al,modem.mden ; enable IRQ. (bit=0 means enable) out dx,al ; rewrite interrupt mask byte mov dx,modem.mdcom inc dx ; modem control register (3fch) mov al,0fh ; set DTR, RTS, OUT1, OUT2 out dx,al call delay dec dx ; set up serial card Line Control Reg in al,dx ; get present settings mov savlcr,al ; save them for restoration call delay ; Telepath with this delay removed mov al,3 ; 8 data bits. DLAB = 0 out dx,al call delay ; Telepath fails if this is removed mov dx,modem.mddat inc dx ; int enable reg (03f9) in al,dx mov savier,al ; save for restoration mov dx,modem.mdiir ; Interrupt Ident reg (03fah) in al,dx ; read current setting call delay ; Telepath fails if this is removed mov al,087h ; 8 byte trigger (80), reset fifos (2/4), Rx fifo(1) out dx,al mov fifo,al ; assume FIFO is active call delay ; Telepath fails if this is removed in al,dx ; read back iir and al,0c0h ; select BOTH fifo bits: 16550A vs 16550 (bad fifo) cmp al,0c0h ; are both fifo enabled bits set? je serin6 ; e = yes, rcvr fifo is ok (16550/A) call delay ; Telepath fails if this is removed xor al,al ; else turn off fifo mode (16550/etc) out dx,al mov fifo,al ; say no FIFO call delay serin6:mov dx,modem.mddat ; data and command port, read and flush any in al,dx ; char in UART's receive buffer inc dx ; interrupt enable register 3f9h call delay ; Telepath fails if this is removed mov al,1 ; set up interrupt enable register out dx,al ; for Data Available only call delay ; Telepath fails if this is removed add dx,3 ; modem control register 3fch in al,dx ; read original mov savstat,al ; save original mov al,0bh ; assert DTR, RTS, not OUT1, and OUT2 cmp dupflg,0 ; full duplex? je serin7 ; e = yes mov al,9h ; assert DTR, not RTS, not OUT1, OUT2 serin7:out dx,al ; OUT2 high turns on interrupt driver chip sti jmp serin30 ; finish up serin8: mov al,flags.comflg cmp al,'N' ; NetBios? je serin9 ; e = yes cmp al,'O' ; Opennet Network? (FGR) jne serin11 ; ne = no serin9:mov port_nb.portrdy,0 ; say port is not ready yet call setnet ; setup network session and pcnet flag jc serin10 ; c = failed jmp serin30 ; nc = success serin10:ret ; fail, carry set, leave portin at 0 serin11:cmp al,'E' ; using EBIOS? jne serin13 ; ne = no test nettype,acsi ; using EBIOS.COM? jnz serin9 ; nz = not using it mov bx,offset ebcoms ; es:bx to ebcoms structure mov ebcoms+1,80h ; force a network connection mov ah,ebredir ; do redirection xor al,al mov dx,ebport int rs232 or ax,ax jz serin12 ; ax = 0 is success stc ; fail ret serin12:mov dx,ebport ; port 0..3 mov bx,offset rcvbuf ; receive buffer for EBIOS push es mov ax,ds mov es,ax ; set es:bx to the buffer address mov cx,nbuflen ; set cx to buffer's length mov ax,ebbufset*256+2 ; set rcvr buffered mode int rs232 mov cx,nbuflen mov bx,offset xmtbuf ; EBIOS transmitter work buffer mov ax,ebbufset*256+1 ; set xmtr buffered mode int rs232 mov ax,ebmodem*256+3 ; set outgoing DTR and RTS modem leads int rs232 ; and ignore incoming leads mov pcnet,1 pop es jmp short serin30 serin13:cmp al,'D' ; DECnet? jne serin14 ; ne = no call decstrt ; reinit jnc serin30 ; nc = success ret ; fail, carry set, leave portin at 0 serin14:cmp al,'T' ; Novell TELAPI? jne serin15 ; ne = no cmp pcnet,2 ; going already? je serin30 ; e = yes call telstrt ; start Telnet session jnc serin30 ; nc = success call telapiclose ; close session stc ret ; fail, leave portin at 0 serin15:cmp al,'I' ; TES? jne serin17 ; ne = no cmp teslat,0 ; using LAT? je serin16 ; e = no, older style call decstrt ; reinit jnc serin30 ; nc = success ret ; fail, carry set, leave portin at 0 serin16:call tesstrt ; start a TES session jnc serin30 ; nc = success mov ax,2000 ; pause 2 sec for any msg call pcwait stc ret serin17:cmp al,'t' ; TCP/IP? jne serin18 ; ne = no call tcpstart ; start TCP connection jnc serin30 ret ; fail serin18:cmp al,'U' ; Ungermann Bass? je serin20 ; e = yes cmp al,'C' ; 3Com BAPI? je serin20 ; e = yes serin19:cmp al,'b' ; [JRS] Beame & Whiteside TCP jne serin20 ; [JRS] ne = no call bwstart ; [JRS] start a Telnet session w/BWTCP jnc serin30 ; [JRS] nc = success ret ; [JRS] serin20:mov bl,al ; preset net type call comstrt ; start net jnc serin30 ret ; c = failure serin30:push bx mov bx,portval ; get port data structure mov [bx].portrdy,1 ; say the comms port is ready mov parmsk,0ffh ; parity mask, assume parity is None cmp [bx].parflg,parnon ; is it None? je serin31 ; e = yes mov parmsk,07fh ; no, pass lower 7 bits as data serin31:xor ax,ax mov al,[bx].floflg ; flow control kind mov flowcnt,al ; save here for active use mov ax,[bx].flowc ; get flow control chars mov flowoff,al ; xoff or null mov flowon,ah ; xon or null mov xofrcv,off ; clear xoff received flag pop bx mov quechar,0 ; clear outchr queued flow control mov portin,1 ; say initialized clc ; carry clear for success ret ; We're done SERINI ENDP ; Gateway 2000 Telepath internal modem extra delay routine delay proc near push ax mov ax,1 ; 1 millisecond call pcwait pop ax ret delay endp ; Reset the serial port. This is the opposite of serini. Calling ; this twice without intervening calls to serini should be harmless. ; Moved push/pop es code to do quicker exit before interrupts enabled. ; Returns normally. ; 22 June 1986 Leave OUT1 low to avoid resetting Hayes 1200B's. [jrd] ; 21 Feb 1987 Add support for Bios calls [jrd] ; 17 May 1987 Redo for COM3/4 support [jrd] ; 9 July 1989 Accomodate 16550/A receiver fifo mode. [jrd] SERRST PROC NEAR cmp portin,0 ; Reset already? jg srst3 ; g = no clc ret ; e = yes, l=not used yet, just leave srst3: cmp flags.comflg,'0' ; Bios or networks? jb srst4 ; b = no, real UART jmp srst8 ; finish up srst4: push word ptr savsci ; save original interrupt owner push word ptr savsci+2 ; offset and segment mov word ptr savsci,offset nulint ; redirect to our null routine mov ax,seg nulint ; segment of null routine is code mov word ptr savsci+2,ax xor cx,cx ; loop counter srst2: mov dx,modem.mdstat ; status register in al,dx call delay ; delay and al,60h ; Shift Reg Empty & Holding Reg Empty cmp al,60h ; are both set? loopne srst2 ; ne = no, wait until so (or timeout) xor al,al mov dx,modem.mdiir ; modem Interrupt Ident reg (03fah) out dx,al ; turn off FIFO mode call delay dec dx ; point at int enable reg 3f9h out dx,al ; disable interrupts from this source call delay ; delay, let stray ints occur now add dx,2 ; point at Line Control Register 3fbh mov al,savlcr ; saved bit pattern and al,not 80h ; force DLAB bit to 0 out dx,al ; restore line control state call delay ; clear modem's delta status bits and reassert DTR etc inc dx ; increment to modem control register 3fch mov al,savstat ; saved modem control reg (03fch) or al,3 ; ensure DTR and RTS are asserted cmp dupflg,0 ; full duplex? je srst2a ; e = yes xor cx,cx push dx ; save dx around test below srst2b: mov dx,modem.mdstat ; modem line status reg in al,dx ; read transmitter shift reg empty bit call delay test al,40h ; is it empty? loopz srst2b ; z = no, not yet pop dx mov al,savstat ; saved modem control reg or al,1 ; assert DTR and al,not 2 ; unassert RTS srst2a: out dx,al ; restore modem control reg (03fch) call delay ; pause, in case stray interrupt is generated add dx,2 ; modem status register 3feh in al,dx ; clear status register by reading it mov mdmhand,al ; save here for Show Modem call delay cli ; Disable interrupts mov dx,modem.mdmintc inc dx in al,dx ; Interrupt controller int mask or al,modem.mddis ; inhibit our IRQ line call delay out dx,al pop word ptr savsci+2 ; recover original int owner's addr pop word ptr savsci ; replace original IRQ intrpt vector push bx mov al,byte ptr modem.mdintv ; vector number to do mov dx,word ptr savsci ; offset part push ds mov bx,word ptr savsci+2 ; segment part mov ds,bx ; ds:dx has interrupt vector mov ah,setintv ; set interrupt vector int dos ; replaced pop ds mov al,rs232 ; Bios serial port interrupt vector to restore mov dx,word ptr sav232 ; offset part push ds mov bx,word ptr sav232+2 ; segment part mov ds,bx mov ah,setintv ; set interrupt vector int dos pop ds pop bx cli mov ah,savirq ; saved Interrupt state and ah,modem.mddis ; pick out our IRQ bit mov dx,modem.mdmintc ; interrupt controller cntl address inc dx in al,dx ; get current intrpt controller state push ax in al,ppi_port ; delay pop ax and al,modem.mden ; set our bit to zero or al,ah ; set previous state of our IRQ out dx,al ; reset IRQ to original state sti mov dx,modem.mddat ; base address, 03f8h inc dx ; Interrupt Enable Reg (03f9h) mov al,savier ; saved IER out dx,al ; restore setting ; non-UART processes srst8: mov portin,0 ; reset flag push bx mov bx,portval ; port data structure mov [bx].portrdy,0 ; say port is not ready pop bx mov quechar,0 ; clear any outchr queued char clc ret SERRST ENDP code ends code1 segment assume cs:code1 ; Null interrupt routine, to handle strays nulint proc near push ax push dx push ds mov ax,data ; set data seg addressibility mov ds,ax mov al,mdeoi ; specific EOI mov dx,mdintc ; interrupt controller control word out dx,al test dl,80h ; slave controller? jz nulint1 ; z = no mov al,20h ; general EOI out 20h,al ; EOI to master 8259 nulint1:pop ds pop dx pop ax iret nulint endp ; Dummy Interrupt 14H to defeat DOS interference with serial port when CTTY ; and Kermit use the port simultaneously. If ports differ then chain DOS to ; original Int 14H Bios code. Else return dummy status=ok reports and ; Backspace for Read, ignore char for Write. ; Entered with AH = function request, AL = char to be sent, DX = com port num ; CS is our code segment, DS is DOS's, SS is ours or DOS's, interrupts off. ; 25 June 1987 [jrd] SERDUM PROC FAR push ds ; preserve all registers push ax mov ax,seg data ; get our data segment mov ds,ax mov al,flags.comflg ; get port id (COM1 = 1, COM2 = 2) and al,7 ; use lower three bits dec al ; DOS counts COM1 as 0, etc mov dosctty,0 ; assume DOS not using our comms line cmp dl,al ; referencing same port as Kermit is using? pop ax ; recover request parameters jne serdu1 ; ne = no, chain to Bios routine mov dosctty,1 ; say DOS is using our comms line pop ds cmp ah,1 ; send char in al? jb serdu3 ; b = no, init, return dummy status=ok ja serdu2 ; a = no, other mov ah,60h ; yes, set line status=ok in ah iret serdu2: cmp ah,2 ; receive char (and wait for it)? jne serdu3 ; ne = no, return dummy report mov al,BS ; yes, return ascii BS to DOS xor ah,ah ; ah = errors (none here) iret serdu3: mov ax,60b0h ; dummy status report:xmtr empty, CD, iret ; DSR, and CTS are on serdu1: pop tempdum ; save old ds push word ptr sav232+2 ; push Bios int 14H handler segment push word ptr sav232 ; push Bios int 14H handler offset push tempdum ; recover old ds pop ds ret ; do a ret far (chain to Bios) SERDUM ENDP ; Serial port interrupt routine. This is not accessible outside this ; module, handles serial port receiver interrupts. ; Revised on 22 May 1986, again 2 August 1986 to run at 38.4kb on PC's. ; Srcpnt holds offset, within buffer Source, where next rcv'd char goes. ; Count is number of chars now in buffer, and oldest char is srcpnt-count ; done modulo size of Source. All pointer management is handled here. ; Control-G char substituted for char(s) lost in overrun condition. ; Upgraded to read cause of interrupt from interrupt ident reg (accepts only ; data ready), chain to old interrupt if source is not our device. ; 9 Feb 1988 Add storage of interrupt cause in intkind. [jrd] ; 9 July 1989 Add support for 16550/A 14 char receiver fifo. SERINT PROC FAR push ax ; save registers push dx ; push ds mov ax,seg data mov ds,ax ; address data segment mov dx,miir ; modem interrupt ident reg in al,dx ; get interrupt cause mov intkind,al ; save cause here test al,1 ; interrupt available if this bit is zero jz srintc ; z = interrupt is from our source ; temporary item to side step chaining for noisy buses and funny Bios' ; push ds ; preserve data seg addressibility ; pushf ; call the old int handler ; call dword ptr savsci ; via pseudo INT ; pop ds ; recover data seg and intkind,not 4 ; say not-data-ready, to exit below srintc: mov al,mdeoi ; specific EOI mov dx,mdintc ; interrupt controller control word out dx,al test dl,80h ; slave controller? jz srintd ; z = no mov al,22h ; specific EOI for IRQ 2 (cascade) out 20h,al ; EOI the master 8259 srintd: test intkind,4 ; data ready? jnz srint0a ; nz = yes, else ignore srint0: sti ; else turn on interrupts jmp retint ; and exit now (common jump point) srint0a:mov dx,mst ; asynch status port in al,dx srint0b:cli ; no interrupts permitted here and al,mdmover ; select overrun bit mov ah,al ; save it for later mov dx,mdat in al,dx ; read the received character into al test flowcnt,2 ; incoming XON/XOFF flow control? jz srint2 ; z = no mov dh,al ; dh = working copy. Check flow cntl and dh,parmsk ; strip parity temporarily, if any cmp dh,flowoff ; acting on Xoff? jne srint1 ; ne = no, go on cmp xofsnt,0 ; have we sent an outstanding XOFF? jne srint4e ; ne = yes, ignore (possible echo) mov xofrcv,bufon ; set the flag saying XOFF received jmp short srint4e ; and continue the loop srint1: cmp dh,flowon ; acting on Xon? jne srint2 ; ne = no, go on mov xofrcv,off ; clear the XOFF received flag jmp short srint4e ; and continue the loop srint2: push bx ; save register or ah,ah ; overrun? jz srint2a ; z = no mov ah,al ; yes, save present char mov al,bell ; insert control-G for missing char srint2a:mov bx,srcpnt ; address of buffer storage slot mov byte ptr [bx],al ; store the new char in buffer "source" inc srcpnt ; point to next slot inc bx cmp bx,offset source + bufsiz ; beyond end of buffer? jb srint3 ; b = not past end mov srcpnt,offset source ; wrap buffer around srint3: cmp count,bufsiz ; filled already? jae srint4 ; ae = yes inc count ; no, add a char srint4: or ah,ah ; anything in overrun storage? jz srint4a ; z = no mov al,ah ; recover any recent char from overrun xor ah,ah ; clear overrun storage jmp short srint2a ; yes, go store real second char srint4a:pop bx ; restore reg srint4e:mov dx,mst ; uart line status register in al,dx ; get status test al,1 ; data ready? jnz srint0b ; nz = yes, and preserve al sti ; ok to allow interrupts now, not before cmp count,mntrgh ; past the high trigger point? jbe retint ; be = no, we're within our limit test xofsnt,bufon ; has an XOFF been sent by buffer control? jnz retint ; nz = Yes test flowcnt,4 ; using RTS/CTS flow control? jz srint4b ; z = no mov dx,mst ; modem status port (03fdh) dec dx ; modem control reg (03fch) in al,dx and al,not 2 ; reset RTS bit push ax in al,ppi_port ; delay pop ax out dx,al ; tell the UART to drop RTS mov xofsnt,bufon ; remember RTS reset at buffer level jmp short retint srint4b:test flowcnt,1 ; send outgoing XON/XOFF? jz retint ; z = no mov al,flowoff ; get the flow off char (XOFF or null) ; or al,al ; do not send null chars ; jz retint ; z = null, nothing to send push bx mov bx,portval cmp [bx].baud,Bsplit ; doing 75/1200 baud stuff? pop bx jne srint4c ; ne = no mov quechar,al ; put char in outchr queue for sending cmp timeract,0 ; is timer being used at task level? jne srint4d ; ne = yes, just queue the char mov ah,al ; put char into ah call foutchr ; send the char now, non-blocking srint4d:jmp short retint srint4c:call fdopar ; set parity appropriately mov ah,al ; don't overwrite character with status push cx ; save reg xor cx,cx ; loop counter srint5: mov dx,mst ; get port status in al,dx test al,20H ; transmitter ready? jnz srint6 ; nz = yes in al,ppi_port ; delay in al,ppi_port ; delay in al,ppi_port ; delay loop srint5 ; else wait loop, cx times jmp short srint7 ; timeout srint6: mov al,ah ; now send out the flow control char mov dx,modem.mddat push ax in al,ppi_port ; delay pop ax out dx,al mov xofsnt,bufon ; remember we sent an XOFF at buffer level srint7: pop cx ; restore reg retint: pop ds pop dx pop ax iret SERINT ENDP code1 ends code segment assume cs:code DTRLOW PROC NEAR ; Global proc to Hangup the Phone or Network ; by making DTR and RTS low (phone). mov ah,cmword ; allow text, to be able to display help mov dx,offset rdbuf ; dummy buffer mov bx,offset hnghlp ; help message call comnd jc dtrlow3 ; c = failure mov ah,cmeol call comnd ; get a confirm jc dtrlow3 cmp flags.comflg,'0' ; Bios? jb dtrlow1 ; b = no, UART cmp flags.comflg,'4' ; Bios? jbe dtrlow2 ; be = yes, can't access modem lines dtrlow1:call serhng ; drop DTR and RTS cmp taklev,0 ; in a Take file or macro? jne dtrlow2 ; ne = yes, no message mov ah,prstr ; give a nice message mov dx,offset hngmsg int dos dtrlow2:clc ; success dtrlow3:ret DTRLOW ENDP ; Hang up the Phone. Similar to SERRST except it just forces DTR and RTS low ; to terminate the connection. 29 March 1986 [jrd] ; 5 April 1987 Add 500 millisec wait with lines low before returning. [jrd] ; Calling this twice without intervening calls to serini should be harmless. ; If network then call session close procedure to hangup the session without ; losing local name information; serrst does this. ; Returns normally. serhng proc near ; clear modem's delta status bits and lower DTR & RTS cmp apctrap,0 ; APC disable? je shng1 ; e = no stc ; fail ret shng1: call serrst ; reset port so can be opened again cmp flags.comflg,4 ; UART port? jbe shng2 ; be = yes push bx mov bx,portval call [bx].cloproc ; close the active network session pop bx clc ret shng2: call serini ; energize, maybe for first time call serrst ; back to sleep cli ; Disable interrupts push ax push dx mov dx,modem.mddat ; serial port base address add dx,4 ; increment to control register mov al,08h ; reassert OUT2, un-assert DTR,RTS,OUT1 out dx,al in al,ppi_port ; delay add dx,2 ; increment to modem status register in al,dx ; Clear Status reg by reading it sti ; Enable interrupts mov ax,1000 ; 1000 millisec, for pcwait call pcwait ; keep lines low for at least 500 millisec ; call serini ; energize port to set DTR high again ; call serrst ; leave port off for CTTY actions pop dx pop ax clc ret serhng endp ; TCP/IP Telnet session manager. ; Enter with SET PORT TCP/IP command line in buffer decbuf. ; Syntax of that line is ; empty - resume current session, error return if none. ; digit - start or resume session digit, with digit being a local number. ; host - ask if resume or new. If resume call ktcpswap, else tcpstart. ; * - server mode ; Returns sescur as index (0..maxsessions-1) for seslist action. ; Successful return is carry clear, else carry set. sesmgr proc near push bx mov bx,sescur ; current session call termswapout ; swap out current session's emulator pop bx cmp decbuf,1 ; byte count, anything given? jb sesmgr24 ; b = no, use tcphost default ja sesmgr40 ; ja = yes, but more than one char mov bl,decbuf+1 ; get single char mov al,bl and al,not 20h ; upper case, for letters only jmp short sesmgr13 sesmgr10:cmp sescur,-1 ; any session yet? je sesmgr22 ; e = no, use command line call sesdisp ; display the table for guidance, inc help mov dx,offset seshelp mov ah,prstr int dos mov flags.cxzflg,0 ; clear Control-C flag mov ax,0c0ah ; clear buffer and read line mov decbuf+100,80 ; length of our buffer mov dx,offset decbuf+100 ; start of buffer (len, cnt, data) int dos cmp flags.cxzflg,'C' ; Control-C entered? je sesmgr28 ; e = yes, quit mov al,decbuf+101 ; number of printables entered or al,al ; need at least one jz sesmgr15 ; default is NEW mov bl,decbuf+102 ; get first byte mov al,bl and al,not 20h ; upper case, for letters only sesmgr13:cmp bl,'*' ; "*" for server mode? je sesmgr15 ; e = yes, use as host name cmp al,'R' ; RESUME current? jne sesmgr14 ; ne = no clc ; resume current session ret sesmgr14:cmp al,'N' ; NEW? jne sesmgr20 ; ne = no sesmgr15:mov cx,maxsessions ; find an opening for NEW xor bx,bx sesmgr16:mov al,seslist[bx] or al,al ; session in use? jns sesmgr18 ; ns = yes mov sescur,bx ; set current session ident jmp short sesmgr22 ; s = no sesmgr18:inc bx ; next slot loop sesmgr16 mov dx,offset sesnone ; say no more sessions available mov ah,prstr int dos stc ; fail out ret sesmgr20:xor bh,bh ; ensure high byte is clear sub bx,'1' ; assume digit 1..6, remove bias cmp bx,6 ; legal values are 0..5 jae sesmgr10 ; ae = out of range mov sescur,bx ; return slist index for action mov al,bl mov cx,seshostlen ; length of a table entry mul cl ; skip to correct sesname cmp decbuf,1 ; host name given on command line? ja sesmgr22 ; a = yes, use it as host name add ax,offset sesname ; get host name from table mov si,ax mov di,offset tcphost ; update active host name jmp short sesmgr26 ; and switch terminal configuration sesmgr22:mov si,offset decbuf+1 ; name of new host cmp byte ptr [si-1],0 ; byte count, anything given? je sesmgr24 ; e = no, use tcphost default mov di,offset tcphost call strcpy ; copy new host name sesmgr24:mov si,offset tcphost ; host name cmp byte ptr [si],0 ; is this empty too? je sesmgr27 ; e = yes, no host name, fail cmp sescur,0 ; inited current session ident? jge sesmgr25 ; ge = yes mov sescur,0 ; start with session 0 sesmgr25:mov bx,sescur ; return slist index for action mov al,bl mov cx,seshostlen ; length of a table entry mul cl ; skip to correct sesname add ax,offset sesname ; destination table mov di,ax sesmgr26:call strcpy push bx mov bx,sescur ; new session call termswapin ; swap in new session's emulator pop bx clc ret sesmgr27:mov dx,offset sesnohost ; say have no host name mov ah,prstr int dos sesmgr28:stc ret ; user specified host name ; see if name is already in use sesmgr40:mov si,offset decbuf+1 ; user string mov cl,[si-1] ; user string length xor ch,ch cld sesmgr41:lodsb ; read a byte call tolowr ; to lower case mov [si-1],al ; store letter loop sesmgr41 mov cx,maxsessions xor bx,bx ; session subscript, assummed mov si,offset decbuf ; user len+string mov di,offset sesname ; session list of host names cld sesmgr42:push cx push si push di push es mov cl,[si] ; length of user string xor ch,ch inc si ; skip user string count byte inc cl ; include null termintors mov ax,seg sesname mov es,ax repe cmpsb ; compare host names pop es pop di pop si pop cx jne sesmgr43 ; ne = no match, try next entry cmp seslist[bx],0 ; is session active? jl sesmgr43 ; l = no, ignore this entry jmp sesmgr10 ; active, ask NEW/RESUME sesmgr43:add di,seshostlen ; next entry in our table inc bx ; next session subscript loop sesmgr42 jmp sesmgr15 ; start a New session sesmgr endp sesdisp proc near mov ah,prstr mov dx,offset sesheader int dos push bx xor bx,bx ; number of sessions sesdis1:mov al,bl ; get our local counter mov dl,seshostlen ; length of host name array row mul dl add ax,offset sesname ; asciiz host name mov si,ax ; save host name pointer in cx cmp byte ptr [si],0 ; ever had a host name? jz sesdis3 ; z = no, don't display info mov al,seslist[bx] ; get Telnet session number mov dx,offset sesinact ; inactive msg or al,al ; seslist status js sesdis2 ; s = inactive mov dx,offset sesactive ; active msg cmp bx,sescur ; same as current? jne sesdis2 ; ne = no mov dx,offset curmsg ; current msg sesdis2:mov ah,prstr ; show status, ses #, host name int dos mov dl,bl ; count local session idents add dl,'1' ; bias mov ah,conout int dos mov dl,' ' int dos int dos int dos int dos int dos int dos int dos mov dx,si call prtasz ; show host name sesdis3:inc bx ; next item cmp bx,maxsessions ; done all? jb sesdis1 ; b = no pop bx ret sesdisp endp ; Returns session ident in BL when given a Telnet ident in AL. Also updates ; tcphost from session table. ; Returns -1 if no correspondence tcptoses proc near push ax push cx mov cx,maxsessions ; number session slots xor bx,bx tcptose1:mov ah,seslist[bx] ; session status or ah,ah ; active? js tcptose2 ; s = no cmp ah,al ; same active session? je tcptose3 ; e = yes, return BL tcptose2:inc bx loop tcptose1 mov bx,-1 ; return -1 for failure to find pop cx pop ax ret tcptose3: push si push di mov di,offset tcphost ; host name mov al,bl mov cx,seshostlen ; length of a table entry mul cl ; skip to correct sesname add ax,offset sesname ; source table mov si,ax call strcpy pop di pop si pop cx pop ax ret tcptoses endp ; Compute number of iterations needed in procedure pcwait inner loop ; to do one millisecond delay increments. Uses Intel 8253/8254 timer chip ; (timer #2) to measure elapsed time assuming 1.193182 MHz clock. ; For IBM PC compatible machines. pcwtst proc near push cx mov cx,10 ; number of tests to perform pcwtst1:call pcwtst2 ; do the test and new pcwcnt calculation loop pcwtst1 ; repeat several times for convergence pop cx ret pcwtst2:push ax push bx push cx push dx in al,ppi_port ; 8255 chip port B, 61h and al,0fch ; speaker off (bit 1), stop timer (bit 0) out ppi_port,al ; do it ; 10 = timer 2, 11 = load low byte then high byte, 010 = mode 2, 0 = binary mov al,10110100B ; command byte out timercmd,al ; timer command port, 43h xor al,al ; clear initial count for count-down out timer2data,al ; low order byte of count preset, to port 42h out timer2data,al ; high order byte, to the same place in al,ppi_port ; get 8255 setting mov dl,al ; remember it in dl and al,0fch ; clear our control bits or al,1 ; start counter now (Gate = 1, speaker is off) out ppi_port,al ; do it, OUT goes low ; this is the test loop mov ax,8 ; wait 8 millisec call pcwait ; call the software timer ; end test loop mov al,dl ; restore ppi port, stop timer out ppi_port,al in al,timer2data ; read count down value xchg al,ah ; save low order byte in al,timer2data ; get high order byte xchg ah,al ; put in correct sequence neg ax ; subtract from zero to get elapsed tics mov bx,ax ; save observed tics mov ax,pcwcnt ; current pcwcnt value ; new pcwcnt= old pcwcnt * [1193(tics/ms) / (observed tics / loops)] mov cx,8*1193 mul cx or bx,bx ; zero observed tics? jz pcwtst3 ; z = yes, divide by one div bx ; divided by observed tics pcwtst3:mov pcwcnt,ax ; store quotient as new inner loop counter pop dx pop cx pop bx pop ax ret pcwtst endp ;; Wait for the # of milliseconds in ax, for non-IBM compatibles. ;; Thanks to Bernie Eiben for this one. Modified to use adjustable ; inner loop counter (pcwcnt, adjusted by proc pcwtst) by [jrd]. pcwait proc near push cx pcwai0: mov cx,pcwcnt ; inner loop counter for 1 ms (240 @ 4.77 MHz) pcwai1: sub cx,1 ; inner loop takes 20 clock cycles jnz pcwai1 dec ax ; outer loop counter jnz pcwai0 ; wait another millisecond pop cx ret pcwait endp code ends end