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                 AT&T PC6300 Technical Bulletins                        
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 AT&T PC6300 TECHNICAL BULLETIN                                     
                                                                    
 SUBJECT:  MS-DOS Command Notes                                     
 PROVIDED BY:                                                       
                                                                    


    BACKUP
       The backup command will not work properly if programs are
       loaded in memory such as context switch and em4410.

       When indicating a / option using backup, you must leave a
       space between the drive indication and the / option. An
       example of the syntax is "backup C:*.* A: /s", if you don't
       put the space in, only the root directory will be backed up.

       The backup command will usually backup even copy-protected
       software (i.e. WORD), but not always, OVERHEAD EXPRESS
       can't be backed up successfully.

       You can use this chart and the CHKDSK command to determine
       approximately how many floppy disks you need to backup a
       hard disk. For a 20mb disk, just double the figures.

              Hardisk memory used                 Floppies needed
                     10mb...............................30
                     8.3mb..............................25
                     6.6mb..............................20
                     5mb................................15
                     3.3mb..............................10
                     1.6mb...............................5



    FORMAT
       Format /1 will format a disk to be single sided, but only
       160k (DOS 2.11 REL. 1.1) losing 20k. The old DOS doesn't
       have this problem.

       In the DOS manual it states that /s has to be the last
       entry on the line when using format, this isn't true. The
       manual also says the /s copies two hidden sys files, this
       isn't true either, it copies IBMBIO.COM and IBMDOS.COM.
          /* But these are hidden system files normally */

       FORMAT in DOS has a limit of 30 meg. To excede this
       requires a separate formatting utility and device
       driver software.



    MODE
       Undocumented in the manual is the /o option with mode.
       This will return the current status of all COM and LPT
       ports as well as the mode of the monitor.

       The instructions on page 5-59 of the DOS manual are
       wrong. When using MODE LPT1: x,y the only acceptable
       options are 80 and 132 for x, and 6 or 8 for y.

       When redirecting using the MODE command you must use
       a colon after LPT1. An example would be "mode lpt1:=com1".

       The 't' option with mode only works in conjunction
       with the 'r' and the 'l'. For example "mode,r,t".



    RECOVER
       When you use the RECOVER command, any file recovered
       is renamed FILExxxx (starting at FILE0001). If you did
       this without naming a particular file (i.e. RECOVER D:)
       all files will be renamed, if you didn't backup or copy
       the files previously, you will have a near impossible
       task of renaming (using) the files, as only ascii
       files will be readable.



    RESTORE
       Subdirectories previously backed up (within the
       subdirectory) must first be created before using RESTORE
       (RESTORE will not create the subdirectory). Otherwise,
       RESTORE will prompt for all of the disks, but no files
       will be restored. Note, however, that RESTORE will
       create subdirectories and restore files to a virgin
       (nothing on it) hard disk.



    SORT
       The maximum file size that can be sorted is 63k.
       The proper syntax for the SORT command is ............
       "SORT[/R][+n] <file >file1", the default for column no.
       is 1. There are only 2 spaces in the command line,
       before <file, and after <file.



    TREE
       If you use the /F option with a printer toggled on,
       the individual file names will not print out on the
       printer. You would have to redirect the output to a
       file, and then print the file out. However, when doing
       this, all file names are concatenated together,
       removing tabs, carriage returns, and line feeds.



    FORMAT.COM
       The following modification will cause the FORMAT
       command to assume the A: drive should you forget and
       leave the  drive specification off. It allows use of
       /o /v /s options.
              C>debug format.com
              -E174 B4 09 B0 00
              -w
              Writing 19EC bytes
              -q
              C>



    DIRECTORIES
       When formatting in DOS, the device driver used sets a
       maximum number of directory entries (root only)
       as follows......

              FLOPPY   ss............64     ds...........112
              HARD     10 meg.......512     20 meg......1024



Ŀ
                                                                    
                                                                    
 AT&T PC6300 TECHNICAL BULLETIN                                     
                                                                    
 SUBJECT:  1.21 ROM Low Level Format Routine for the PC6300         
 PROVIDED BY:                                                       
                                                                    


       If you get the message fixed disk not ready when you
       try to format, and the resident diagnostics show it
       present (i.e. any message but "Fixed Disk Not
       Present"), there is a low level formating routine in
       the Rom Bios which might fix it. This routine can be
       called using Debug in the following manner:

       A> debug (cr)
       - a (cr)
       XXXX:0100 call f000:c038 (cr)
       XXXX:0105 int 20h (cr)
       XXXX:0107 (cr)
       - g (cr)

       Fixed Disk Formating Utility
       All data on the specified fixed disk will be erased.
       Enter fixed disk number (1 to 8) or Q to quit:___

                                   (note 1 to 8 corresponds to
                                                 c:, d:  .....)

       Formating Fixed Disk
       Format is complete
       Proceed with FDISK and FORMAT

       Program terminated normally
       - q (cr)
       A>


       Note the Rom 1.21 will not give the Program Terminated
       message and you will have to reboot after the proceed
       message.



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 AT&T PC6300 TECHNICAL BULLETIN                                    
                                                                   
 SUBJECT: Low Level Format for ROM 1.43                            
 PROVIDED BY:                                                      
                                                                   


 FIRST OF ALL:
   1. A low level format will destroy everything on the hard drive.
      Are you sure you want to do this???
   2. As of 8/20/86, ROM 1.43 is available through AT&T National
      Parts at 800-222-7278.  The comcode (part number) is 105203780,
      and the price is $35.00.

 The following low level routine for ROM 1.43 will NOT display or
 return messages.  The only indication that the format is working
 will be the hard drive LED.  This routine is directly programming
 the HDU Controller.  For further information, consult the SYSTEM
 PROGRAMMERS GUIDE.

 - Boot off the MS-DOS System Diskette
 - Once booted, insert Supplimental Diskette
 - Enter "DEBUG".  The following table represents the input and
                   output of the commands.

 ENTER COMMAND      RESPONSE SHOULD BE
       
 DEBUG              -
  i 321             CO
                    -
  o 322 0           -
  i 321             CD
                    -
  o 320 04          -
  o 320 00          -
  o 320 00          -
  o 320 00          -
  o 320 06          -
  o 320 07          -

 At this point, the drive activity LED should come on, and the
 drive will begin to format.  When the process is complete, the
 LED will go out.
 Now reboot from the MS-DOS System Diskette and proceed with
 FDISK and FORMAT.


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 AT&T PC6300 TECHNICAL BULLETIN                                
                                                               
 SUBJECT: Motherboard Dip Switch Settings for 1.43 ROM BIOS    
 PROVIDED BY:                                                  
                                                               


     THE FOLLOWING SWITCH SETTINGS ARE FOR ROM 1.43 ONLY!!


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 MOTHERBOARD SWITCH BANK 0 - LOCATION 7T      1=ON  0=OFF     
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SW1SW2SW3SW4SW5SW6SW7SW8 FUNCTION                      
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 0  1  1  1  X  X  X  X  128KB RAM on Motherboard      
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 1  0  1  1  X  X  X  X  256KB RAM on Motherboard      
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 1  1  0  1  X  X  X  X  512KB RAM - 256K on Motherbrd 
                                     256K on Expansion 
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 0  1  0  1  X  X  X  X  640KB RAM - 256K on Motherbrd 
                                     384K on Expansion 
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 0  1  0  0  X  X  X  X  640KB RAM on MB - 128K Bank 0 
                                           512K Bank 1 
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 0  1  1  0  X  X  X  X  640KB RAM on MB - 512K Bank 0 
                                           128K Bank 1 
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 1  1  1  0  X  X  X  X  512KB RAM on MB - 512K Bank 0 
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 X  X  X  1  X  X  X  X  ONLY 64KB RAM Chips used      
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 X  X  X  0  X  X  X  X  256KB RAM Chips used anywhere 
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 X  X  X  X  1  X  X  X  8087 NDP not present          
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 X  X  X  X  0  X  X  X  8087 NDP present              
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 X  X  X  X  X  1  X  X  8250 Async Comm Chip present  
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 X  X  X  X  X  0  X  X  Z8530 SCC present             
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 X  X  X  X  X  X  X  1  Bank 1 on Motherboard empty   
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 X  X  X  X  X  X  X  0  Bank 1 on Motherboard full    



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 MOTHERBOARD SWITCH BANK 1 - LOCATION 7W     1=ON, 0=OFF      
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SW1SW2SW3SW4SW5SW6SW7SW8 FUNCTION                      
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 1  X  X  X  X  X  X  X  48 TPI Floppy Drives (360KB)  
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 0  X  X  X  X  X  X  X  FUTURE USE ONLY               
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 X  1  X  X  X  X  X  X  Slow start up speed - MFDU    
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 X  0  X  X  X  X  X  X  FUTURE USE ONLY               
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 X  X  1  X  X  X  X  X  Indigenous HDU ROM            
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 X  X  0  X  X  X  X  X  External HDU ROM              
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 X  X  X  1  X  X  X  X  Fast scroll rate              
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 X  X  X  0  X  X  X  X  Slow scroll rate              
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 X  X  X  X  1  1  X  X  EGA or video Cntrllr Disabled 
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 X  X  X  X  0  1  X  X  40x25 color mode              
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 X  X  X  X  1  0  X  X  80x25 color mode              
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 X  X  X  X  0  0  X  X  80x25 monichrome mode         
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 X  X  X  X  X  X  1  1  1 Floppy Drive                
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 X  X  X  X  X  X  0  1  2 Floppy Drives               
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 X  X  X  X  X  X  1  0  3 Floppy Drives (2 physical)  
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 X  X  X  X  X  X  0  0  4 Floppy Drives (2 physical)  



Ŀ
                                                                
 AT&T PC6300 TECHNICAL BULLETIN                                 
                                                                
 SUBJECT: Hard Disk Drive Parameter Table (ROM 1.21 and 1.43)   
 PROVIDED BY:                                                   
                                                                


                       Ŀ
                        ROM BIOS 1.21 
                       

                                            DTC CONTROLLER
                                          DRIVE #0  DRIVE #1
    DRIVE TYPE                            12345678  12345678
         
 0. 5MB                                   ..CC..CC  CC..CC..
 1. 24MB                                  ..OC..CC  OC..CC..
 2. 15MB                                  ..CO..CC  CO..CC..
 3. 10MB (default)                        ..OO..CC  OO..CC..
 4. 5MB - Syquest SQ306                   ..CC..OC  CC..OC..
 5. 30MB - CDC Wren I                     ..OC..OC  OC..OC..
 6. 20MB - Seagate ST225, CMI 4426        ..CO..OC  CO..OC..
 7. 20MB - Miniscribe 3425, OPE XM 5220   ..OO..OC  OO..OC..
 8. 20MB - CMI 4426                       ..CC..CO  CC..CO..
 9. NOT SPECIFIED                         ..OC..CO  OC..CO..
 A. NOT SPECIFIED                         ..CO..CO  CO..CO..
 B. NOT SPECIFIED                         ..OO..CO  OO..CO..
 C. NOT SPECIFIED                         ..CC..OO  CC..OO..
 D. NOT SPECIFIED                         ..OC..OO  OC..OO..
 E. NOT SPECIFIED                         ..CO..OO  CO..OO..
 F. NOT SPECIFIED                         ........  OO..OO..
                                          C = CLOSED = ON
                                          O = OPEN = OFF

                       Ŀ
                        ROM BIOS 1.43 
                       


                                 DTC CONTROLLER        WD CONTROLLER
                               DRIVE #0  DRIVE #1    DRIVE #0  DRIVE #1
    DRIVE TYPE                 12345678  12345678    12345678  12345678
              
 0. 30MB - CDC Wren I          ..CC..CC  CC..CC..    ..CC..CC  CC..CC..
 1. 20MB - Seagate ST225,
           CMI 4426            ..OC..CC  OC..CC..    ..OC..CC  OC..CC..
 2. 20MB - Tandon TM 262       ..CO..CC  CO..CC..    ..CO..CC  CO..CC..
 3. 10MB (default)             ..OO..CC  OO..CC..    ..OO..CC  OO..CC..
 4. 20MB - Miniscribe 3425,
           OPE XM 5220         ..CC..OC  CC..OC..    ..CC..OC  CC..OC..
 5. 30MB - CDC Wren I          ..OC..OC  OC..OC..    ..OC..OC  OC..OC..
 6. 20MB - Seagate ST225,
           CMI 4426            ..CO..OC  CO..OC..    ..CO..OC  CO..OC..
 7. 20MB - Miniscribe 3425,
           OPE XM 5220         ..OO..OC  OO..OC..    ..OO..OC  OO..OC..
 8. 40MB - CMI 6426            ..CC..CO  CC..CO..    ..CC..CO  CC..CO..
 9. 45MB - Miniscribe 6053     ..OC..CO  OC..CO..    ..OC..CO  OC..CO..
 A. 40MB - Tandon TM 755       ..CO..CO  CO..CO..    ..CO..CO  CO..CO..
 B. 51MB - CDC Wren II 94205   ..OO..CO  OO..CO..    ..OO..CO  OO..CO..
 C. 67MB - CDC Wren II         ..CC..OO  CC..OO..    ..CC..OO  CC..OO..
 D. 68MB - Micropolis 1325,
           Miniscribe 6085,
           Seagate 4085        ..OC..OO  OC..OO..    ..OC..OO  OC..OO..
 E. 40MB - Seagate ST251       ..CO..OO  CO..OO..    ..CO..OO  CO..OO..
 F. Drive #0 ONLY, no #1       ........  OO..OO..    ........  OO..OO..
                               C = CLOSED = ON       C = JUMPER ON
                               O = OPEN = OFF        O = JUMPER OFF

Ŀ
                                                                       
  AT&T PC6300 TECHNICAL BULLETIN                                       
                                                                       
  SUBJECT:  AT&T Personal Computer Parts List                          
  PROVIDED BY:                                                         
                                                                       


    PC6300 PARTS LIST
                                      COMCODE             PEC Code

    MS-DOS 2.11 Rel 2.0              845655158            1021-D01
    MS-DOS 3.1                       845657683            1021-009
    PC6300 User's Guide              403318991
    GW-Basic User's Guide            403319007
    PC6300 Service Manual            403319031
    PC6300 System Programmers Guide  403319015
    PC6300 Tech Reference Manual     403319023
    CPU1                             403351406            3703-010
    CPU1E                            403846702            3703-E10
    CPU1 MOD-2                       403973944            3703-011
    CPU1Z                            405168816            3703-Z13
    CPU2                             403351414            3703-020
    CPU2E (Soldered)                 403846694            3703-E20
    CPU2E MOD-2 (Socketed)           403973951            3703-E21
    CPU2E/640                        405193418            3703-E23
    CPU2Z                            405168832            3703-Z23
    CPU3                             403351422            3703-030
    CPU3U/640                        403968613            3703-040
    CPU3/256K MEM BRD                403973928            3703-050
    CPU3U/640 (128K)                 405193442            3703-053
    CPU3X                            403973910            3703-060
    CPU3X/640                        405193467            3703-063
    CPU3Z                            405168824            3703-Z63
    Power Supply LA16                403351240
    Power Supply LA16B               405204900
    Fan Assembly                     403351257
    Motherboard 128K BA139/10.1      405055161
    Motherboard 128K BA139/12        405018557
    Motherboard 256K BA135/10.1      405055179
    Motherboard 256K BA135/12        405018581
    Motherboard 256K BA161/00        405055195
    Motherboard 256K BA161/01        405055203
    Motherboard 512K BA155/00        405055229
    Motherboard 640K BA189           405203019
    10MB HDU (Tandon)                405018730
    10MB HDU (OPE-1)                 405018763
    10MB HDU (OPE-2)                 405018789
    10MB HDU (Seagate)               405018805
    20MB HDU (Seagate)               405018839            37575
    20MB HDU (Miniscribe)            405018847
    20MB HDU (OPE)                   405117722
    CRT Controller P-2 GO317         405055237
    CRT Controller P-4 GO318         405018631
    CRT Controller P-8 GO380         405203027
    HDU Controller (DTC)             403350952
    HDU Controller (WD WX2)          405023011
    HDU Controller (WD WX1)          405214669
    Hard Disk Controller (West Dig)  405023011
    Monitor 310 B/W                  403351364            37310
    Monitor 311 Green                403351380            37311
    Monitor 313 Green                403351349            37313
    Monitor 313 Mod-2                405004755            37313
    Monitor 317 Color                403351331            37317
    Monitor 318 Color                403351356            37318
    Monitor 318 Mod-2                405004763            37318
    Monitor 318 Hitachi              405004748            37318
    Bus Converter (2 16bit slots)    403350986
    Bus Converter (3 16bit slots)    405018664
    360K MFDU (OPE)                  403319080            37305
    360K MFDU (Toshiba-1)(DOOR)      403351430
    360K MFDU (Toshiba-2)            405055278
    Keyboard Model 301               403351281            37301
    Keyboard Model 301 Mod-2         405162579            37301
    Keyboard ROM v1.1 (8741)         405018607
    Keyboard ROM v2.0 (2716)         405018599
    256K Memory Expansion Board      403351299            37304
    128K Chip Set                    403351273            37303
    512K Chip Set                    405023052            37561
    Display Enhancement Board        403350945            37306
    Color Extension Cables           403309545            2724-72K
    Monichrome Extension Cables      403351315            2724-70K
    8087-2 Math Co-Processor         403768690            37322
    Power Cable                      403816739
    MFDU & HDU Power Cable           403816762
    Video Controller Power Cable     403816747
    CPU2 MFDU Signal Cable           403816754
    CPU3 MFDU Signal Cable           403846918
    HDU Signal Cable                 403846892
    HDU Control Cable                403846900
    Motherboard Power Cable          403846975
    Color Monitor Power Cable        403846967
    HDU Expansion Power Cable        403846959
    AST CC-432 Board                 403716350
    AST PCOX Board                   403716368
    HDU Face Plate                   403908130
    ROM Bios 1.21                    845654029
    ROM Bios 1.43                    105203780 (not avail yet)
    External Security Lock           405078585            37332
    Stop Lock III                    405078577            37333
    Mouse                            403768666            37319
    Video Display Adapter 1.1        845654003            37340
    Image Capture Board              845654011            37341
    Video Bridge Adapter             405067281            3910-020
    Communications Manager I         403308695            37342
    Communications Manager II        845655141            37331
    PC Interface Etherlink Assembly                       37320
    PC Interface Basic Network                            37323
    PC Interface Network Extend                           37324
    SSI Irma Emulation Card          524101276
    4410 Terminal Emulator                                1020-005
    Context Switch                                        1020-006
    PC6300 PC INT RS232                                   1020-008
    Tango PC Software                                     1020-011
    513 Terminal Emulator                                 1020-013
    Video Catalog                                         1021-014
    Informix                                              1022-007
    File It!                                              1022-008
    Overhead Express                                      1022-702
    Remote Enhanced Cap                                   1023-F01
    Remote Cap                                            1023-F02
    AT&T Retail Manager                                   1026-B01
    PC6300 Mortgage Line                                  1027-B00



    PC6300+ PARTS LIST
                                      COMCODE             PEC Code

    MS-DOS 3.1                       845657683            1021-009
    UNIX Sys V Rel 2                 845657758            1111-UX1
    UNIX Sys V S/W Development Set   845657774            1111-DT1
    PC6300+ Getting Started Manual   845657079            1673-101
    PC6300+ Service Manual           845657113            1673-102
    PC6300+ Tech Reference Manual    845657048            1673-100
    PC6300+ System Programmers Guide 845657899
    PC6300+ UNIX Programmers Ref.    845657121
    PC6300+ Integrated S/W Dev Guide 105152789
    CPU21 1.2mb and 360k MFDU        405023086            3705-101
    CPU21 Gen-4.5                    405117649            3705-101
    CPU21 Gen-5.0                    405211533            3705-101
    CPU22 1.2mb MFDU and 20mb HDU    405023102            3705-102
    CPU22 Gen-4.5                    405117656            3705-102
    CPU22 Gen-5.0                    405117680            3705-102
    CPU23 360k MFDU and 20mb HDU     405036880            3705-103
    CPU23 Gen-4.5                    405117664            3705-103
    CPU24 1.2mb MFDU only            405076423            3705-104
    CPU24 Gen-4.5                    405117672            3705-104
    CPU25 360k MFDU only             405076431            3705-105
    2MB Mem Exp Board (with 512K)    405120858            37555
    Power Supply                     403351240
    Motherboard 512K                 405022955
    Bus Converter Board              405022997
    Hard Disk Controller (West Dig)  405023011
    Video Controller                 405022971
    Monichrome Monitor               403351349            37313
    Color Monitor model 318          403351356            37318
    Keyboard model 302               405007683            37551
    Floppy Drive 360K                403319080            37305
    Floppy Drive 1.2MB               405007675            37558
    Hard Disk Unit 20MB              405018839            37575
    512K Chip Set                    405023052            37561
    128K Chip Set                    403351273            37303
    Upgrade Kit (6300 to 6300+)      405023037            37569
    Display Enhancement Board        403350945            37306
    AST CC-432 Board                 403716350
    Comm Manager Board               103966065            37331
    Mouse                            403768666            37319
    80287-3 Coprocessor              405023078            37565
    60MB Tape Expansion Unit         405117706            37570
    60MB Tape / 20MB HDU             405117714            37571
    Fan Assembly                     403351257
    Power Cable                      403816739
    MFDU and HDU Power Cable         403816762
    Monichrome Monitor Power Cable   403816747
    Color Monitor Power Cable        403846967
    HDU Expansion Power Cable        403846959
    Informix Relational Database                          1111-RDB
    C-ISAM                                                1111-ISM
    RM/Cobol                                              1111-CB2
    RM/Cobol Runtime Module                               1111-CBR
    Paint Power                                           1111-PT2
    Paint Power Plus                                      1111-PT1
    RM/Fortran                                            1111-FO4
    CrystalWriter Plus                                    1111-CWP
    Professional Writer Package                           1111-PWP
    File-It!                                              1111-FIT
    UltraCalc                                             1111-UCL



    PRINTER PARTS LIST



    435 Plotter Parts                 COMCODE             PEC Code

    435 Plotter                      403815327            3330-435
    Pen Motor/Encoder Assy           403815657
    Paper Motor/Encoder Assy         403815665
    Circuit Card - RS232             403815335



    478/479 Printer Parts             COMCODE             PEC Code

    478 Printer                      500066634            3330-478
    479 Printer                      500066642            3330-479
    Ribbon Cartridge (6 pack)                             8230-050
    Printhead Assembly               524552007
    Terminal Control Card            524109378
    Print Engine Drive Card          524109469
    Switch & Display Card            524109410
    Power Supply Card                524109683
    Print Engine (478)               524270006
    Print Engine (479)               524270014
    Control Panel (478)              524550837
    Control Panel (479)              524550845



    477 Printer Parts                 COMCODE             PEC Code

    477 Deluxe Color Printer         404077083            3330-477
    Operator Panel                   404077323
    Sheet Feeder, 1 bin              404077141            33020
    Sheet Feeder, 3 bin              404077166            33021
    ROM Font Cartridge                                    33022
        Orator         04            404077174
        Light Italic   05            404077182
        Letter Gothic  06            404077190
        Scientific     07            404077208
    PC6300 Cable (Parallel)          524274255            2724-89G
    Pedestal with Casters            524274214            9308
    Paper Rack                       524274222            9308
    Dolly                            524274230            9308
    477 Black Ribbon                 404077091            8230-065
    477 Color Ribbon                 404077109            8230-066
    477 Transparency Ribbon          404077117            8230-067
    477 Transparencies (50/box)      404077125            8102-001
    Platen Assembly                  404077232
    Power Board                      404077273
    Interface Board                  404077281
    Main Board                       404077299
    Fan Assembly                     404077331



    455 Printer Parts                 COMCODE             PEC Code

    455 Printer (Qume 11)            403716509            3330-455
    Centronics Parallel Interface    403716574            30462
    IBM Parallel Interface           403716566            30461
    Serial RS232-C Interface         403716558            30460
    Tractor Feed                     403716517            30455
    Sheet Feeder, 1 bin              403716538            30456
    Sheet Feeder, 2 bins & envelope  403716541            30457
    Paper Basket                     403716582            30465
    Noise Reduction Cover            403716590            30466
    Ribbon Cartridge (6 pack)        403716600            8290-455
    Bumper, Rear Hammer              403716996
    Hammer Assembly                  403716707
    Felt, Guide Wipe                 403717176
    Lever Arm, Feed Roller Shaft     403717093
    Ribbon Cassette Latch            403716214
    Card Guide                       403716731
    Hammer Armature Assembly         403716699
    Carriage Motor/Encoder Assembly  403716681
    Platen Knob                      403716036
    Front Panel Assembly             403716715
    Carriage Assembly                403716640
    Timing Belt, Grey                403716970
    Logic Card                       403716957
    Power Supply                     403716665
    Platen Assembly                  403716673



    470 Printer Series Parts          COMCODE             PEC Code

    470 Printer                      403318967            3330-470
    471 Printer                      403818503            3330-471
    473 Printer                      403318959            3330-473
    474 Printer                      403818487            3330-474
    475 Printer                      403318942            3330-475
    476 Printer                      403818495            3330-476
    470/471 CPU Board                403848104
    473/474 CPU Board                403848096
    475/476 CPU Board                403848112
    Print Head                       403318975
    Ribbon Cartridge (6 pack)        403318934



    457/458 Printer Parts             COMCODE             PEC Code

    457 Printer                      403716491            3330-457
    458 Printer                      403716616            3330-458
    Autosheet Feed, 1 Bin            403716475            38476
    Autosheet Feed, 2 Bin            403716467            38477
    Tractor Feed                     403716483            38475
    Ribbon Cart (4 pack, hi qual)    403716459            8290-M5X
    Ribbon Cart (4 pack, long life)  403716442            8290-FAB
    Ribbon Mtr                       403716822
    Console                          403717002
    Logic Board                      403716723
    Power Filter Board               403716772
    Transport Motor                  403717069
    Interface Board - Parallel       403716798
    Interface Board - Serial         403716806
    Line Space Motor                 403717051
    End Paper Photosensor            403717143
    Carriage Drive Belt              403716988
    Lever Pressure Roller            403716921
    Paper Feed Knob                  403716756
    End Ribbon Photosensor           403716830
    Sensor Micro for Carr Movement   404717085
    Cover Open Microswitch           403716742
    Carriage Group                   403718190
    Platen                           403718224
    Cover Kit                        403717366
    Transformer                      403717614
    Miscellaneous Kit                403717374



Ŀ
                                                                    
                                                                    
 AT&T PC6300 TECHNICAL BULLETIN                                     
                                                                    
 SUBJECT:  All About ROM BIOS 1.43                                  
 PROVIDED BY:                                                       
                                                                    


The following is a list of enhancements added in BIOS 1.43.

    1. Support for a larger repertoire of hard disks
    2. Support for Western Digital Hard Disk Controller, in addition
       to the DTC Controller.
    3. Support for IBM's Enhanced Graphics Adapter (EGA).
    4. Operation without a Display Controller Board.
    5. Remote boot from a Local Area Network, such as STARLAN or IBM
       PC Network.
    6. Support for light pens.
    7. Resident diagnostics for the Numeric Coprocessor 8087.


In addition to the above enhancements, a number of problems reported
in BIOS 1.21 have been corrected in this release.  In particular, the
following problem areas are improved:

    1. ROM BIOS Check Sum Verification.
    2. Reporting of memory parity errors for certain memory
       configurations.
    3. Multiple Disk recognition, in particular, operation of the
       Mountain Expansion Box for the PC6300.
    4. Keyboard buffer overflow due to excessive mouse movement or
       rapid keystrokes.
    5. Time and Date service routine.
    6. Operation of IBM and Hercules Monochrome Video Cards.
    7. Operation of CGA composite video.
    8. 8350 Communication Controller Recognition on power up.
    9. Timeout for the second communication port.
   10. Control Break Interrupt handling.
   11. Unexpected Interrupts handling.


The differences between the BIOS version 1.21 and 1.43 are:

    HARD DISKS:
       1. The Hard Disk Controller code now supports the Western
          Digital and DTC Controller.
       2. The HDU Parameter Table now includes parameters for 16
          hard disks, some of which are duplicate entries to ensure
          backward compatibility with the switch settings.
       3. The hard disk driver code, INT 13, has been substantially
          improved.
       4. A direct call to the floppy disk code existed in BIOS 1.21.
          This was relpaced by an INT 40.

    VIDEO FUNCTIONS:
       1. A new scrolling algorithm, for text mode only, has been
          implemented.  If switch 4 of DIPSW#1, location 7T, is set
          to ON, slow scroll is implemented to accomodate slower
          third party video boards.
       2. An error that caused video output to be truncated when using
          the IBM or Hercules monochrome cards has been corrected.
       3. Text and graphics parameter tables for composite video have
          been corrected.
       4. The switches 5 and 6 of DIPSW#1 are now required to be on
          if no display controller is present, or if IBM's EGA is used.
          Code was added to accomodate these situations.  The EGA
          solution also involved searching for optional ROM from the
          address C0000 rather than from C8000 as was done before.
          In addition, if the EGA is present, the Master Table
          Pointer is not located at ROM BIOS data address 40:84.  The
          keyboard translation table pointer is now directly
          extracted from ROM BIOS.
       5. Light Pen support has been added.  Note that the Indigenous
          Video Board of the PC6300 does not support a light pen.

    8087 COPROCESSOR:
       1. Power up diagnostics for NDP 8087 have been added.
       2. Changes were made to the system initialization routines
          to correct a problem with 8087 exception handling.  This
          involves enabling NMIs and motherboard memory parity error
          detection.

    REMOTE BOOT FROM A NETWORK:
       The boot code of the PC6300 has been corrected to recognize
       that "Enter ROM BASIC" interrupt (INT 18) has been re-pointed
       (note that the PC6300 does not have ROM BASIC and this
       interrupt was not implemented correctly in earlier versions).
       This change lets the PC6300 boot from a network, such as
       STARLAN, if the floppy and hard disks are not ready.

    COMMUNICATION CONTROL:
       1. A problem with the recognition of the 8530 Communication
          Controller during the power up sequence has been fixed.
       2. A change was made to correct the timeout value for the
          second communication port (INT 14).

    TIME AND DATE:
       ROM BIOS time function, INT 1A, that occasionally reported
       erroneous time and date values has been improved by making
       the code more sensitive to clock read errors and
       automatically doing retries.

    KEYBOARD/MOUSE:
       1. The INT 9 was changed to turn off keyboard interrupts while
          sounding the audible alarm that indicates keyboard overflow.
          Before this change, the system would crash if excessive
          movement of the mouse or random banging on the keyboard was
          done, particularly during boot up.
       2. INT 9 was changed to extract the keyboard translation table
          pointer directly from the BIOS instead of the low memory
          BIOS data address 40:84.

    SOFT/HARD RESET FLAG:
       The flag that distinguishes between the soft reset and the hard
       reset was occasionally corrupted in the power up routine.  BIOS
       1.43 fixes this problem.

    CONTROL-BREAK AND TIMER TICK:
       The push/pop register order was made identical to the IBM PC for
       INT 1B, Control-Break, and INT 1C, Timer Tick.  This will correct
       some problems with IBM 3270 SNA Terminal Emulators.

    UNEXPECTED INTERRUPTS:
       Unexpected interrupt handling has been improved.  It is now more
       selective as to which interrupts it masks off.  In BIOS 1.21, all
       pending interrupts were masked off.  In the case of Default
       Interrupt, a pending keyboard interrupt was erroneously thrown away.

    TIMER PROGRAMMING:
       Code to program the 8253 timer 1 has been changed from the word
       mode to byte mode.  This corrects some reported problems with 8253.

    CHECK SUM:
       The BIOS 1.21 only checksums the first 8K bytes.  This has been
       corrected in 1.43 BIOS.




Ŀ
                                                                    
                                                                    
 AT&T PC6300 TECHNICAL BULLETIN                                     
                                                                    
 SUBJECT:  Understanding AT&T's Enhanced Memory Expansion Board     
 PROVIDED BY:                                                       
                                                                    


             Understanding the Enhanced Memory Card
             ======================================

Definitions: Non-paged Memory = Extended Memory
             Paged Memory     = Expanded Memory

Note:  Expanded  Memory  (Paged) may be converted to Extended Memory  by
using  the  AEX  utility but Extended Memory can  not  be  converted  to
Expanded Memory.

Setting Switches on Extended Memory Card:

     Start by setting SW2 positions 1-4.  Each Extended memory card must
have  a  unique base address.  (Unique meaning different from any  other
Extended Memory Card or any other peripheral in the system.)


BASE I/O ADDRESS     SW2-1   SW2-2    SW2-3    SW2-4
====================================================
      0208            ON      ON       ON       ON
      0218            ON      ON       ON       OFF  Default Setting
      0228            ON      ON       OFF      ON
      0238            ON      ON       OFF      OFF
      0248            ON      OFF      ON       ON
      0258            ON      OFF      ON       OFF
      0268            ON      OFF      OFF      ON
      0278            ON      OFF      OFF      OFF
      0288            OFF     ON       ON       ON
      0298            OFF     ON       ON       OFF
      02A8            OFF     ON       OFF      ON
      02B8            OFF     ON       OFF      OFF
      02C8            OFF     OFF      ON       ON
      02D8            OFF     OFF      ON       OFF
      02E8            OFF     OFF      OFF      ON
      02F8            OFF     OFF      OFF      OFF

Setting SW2:

     SW2 positions 5-8 are for specifying the amount of non-paged memory
on  the  Extended  Memory Card that you  are  installing.  These  switch
settings are board independant and only affect the RAM on that board. If
all  of  the RAM on the Extended Memory card is to be set up  as  paged,
these four switch positions will be ignored.  The amount of paged memory
on  the Extended Memory Card equals the total amount of memory  on  card
minus the amount of non-paged memory.

Amount of Non-Paged
Memory on board     SW2-5   SW2-6    SW2-7    SW2-8
====================================================
      128K            ON      ON       ON       ON
      256K            ON      ON       ON       OFF
      384K            ON      ON       OFF      ON
      512K            ON      ON       OFF      OFF   DEFAULT SETTING
      640K            ON      OFF      ON       ON
      768K            ON      OFF      ON       OFF
      896K            ON      OFF      OFF      ON
     1024K            ON      OFF      OFF      OFF   1.0 MG
     1152K            OFF     ON       ON       ON
     1280K            OFF     ON       ON       OFF
     1408K            OFF     ON       OFF      ON
     1536K            OFF     ON       OFF      OFF   1.5 MG
     1664K            OFF     OFF      ON       ON
     1792K            OFF     OFF      ON       OFF
     1920K            OFF     OFF      OFF      ON
     2048K            OFF     OFF      OFF      OFF   2.0 MG

Setting SW1:

If none of the memory on a given Enhanced Memory Board is to  be
  set  up as non-paged set all switches on SW1 OFF.  Switch position SW1
  must  be  set to show the amount of non-paged memory below  the  board
  being installed.  Note:  If 1 Mb of ram reside on the motherboard of a
  PC6300+,  only 640K of this ram is considered non-paged. The remaining
  384K is addressed at the very top of memory and therefore is not below
  the board that is being installed.  SW1-8 is the parity enable switch.
  This should always be on unless none of the ram on board will be  non-
  paged.

Non-Paged Memory
Installed Below     SW2-1  SW2-2  SW2-3  SW2-4  SW2-5  SW2-6  SW2-7  SW2-8
==========================================================================
All ram paged on bd. OFF    OFF    OFF    OFF    OFF    OFF    OFF    ON
   256K              ON     ON     ON     ON     ON     OFF    ON     ON
   512K              ON     ON     ON     ON     OFF    ON     ON     ON
   640K (default)    ON     ON     ON     ON     OFF    ON     OFF    ON
  1024K (512+512K)   ON     ON     ON     OFF    ON     ON     ON     ON
  1152K (640+512K)   ON     ON     ON     OFF    ON     ON     OFF    ON
  1536K (512K+1.0MG) ON     ON     ON     OFF    OFF    ON     ON     ON
  1664K (640K+1.0MG) ON     ON     ON     OFF    OFF    ON     OFF    ON
  2048K (512K+1.5MG) ON     ON     OFF    ON     ON     ON     ON     ON
  2176K (640K+1.5MG) ON     ON     OFF    ON     ON     ON     OFF    ON
  2560K (512K+2.0MG) ON     ON     OFF    ON     OFF    ON     ON     ON
  2688K (640K+2.0MG) ON     ON     OFF    ON     OFF    ON     OFF    ON
  3072K (512K+2.5MG) ON     ON     OFF    OFF    ON     ON     ON     ON
  3200K (640K+2.5MG) ON     ON     OFF    OFF    ON     ON     OFF    ON
  3584K (512K+3.0MG) ON     ON     OFF    OFF    OFF    ON     ON     ON
  3712K (640K+3.0MG) ON     ON     OFF    OFF    OFF    ON     OFF    ON
  4096K (512K+3.5MG) ON     OFF    ON     ON     ON     ON     ON     ON
  4224K (640K+3.5MG) ON     OFF    ON     ON     ON     ON     OFF    ON
  4608K (512K+4.0MG) ON     OFF    ON     ON     OFF    ON     ON     ON
  4736K (640K+4.0MG) ON     OFF    ON     ON     OFF    ON     OFF    ON

Using Enhanced Memory Card in 6300:
The Enhanced Memory Card comes set up for use with the 6300+. If
  if  is  to  be  used with the 6300 you must rotate  the  jumper  block
  located next to the mounting bracket 180 degrees. The jumper block has
  a dot on it in location of pin 1.  This dot should be down (at pin  9)
  for the 6300 and up (at pin 1) for the 6300+.

Using Enhanced Memory Card Ram as conventional memory.
To us the RAM on the Enhanced Memory Card as conventional memory
you  need to set up the Enhanced Memory Card to have non-paged memory of
at  least  the amount of conventional memory to  be  added.  Change  the
switch  settings  on  the  motherboard  to  reflect  the  added  memory.
Remember,  all  switches  on  the Extended Memory Card are  relative  to
that  card so if you have 256K on the motherboard and are using 384K on
the  Enhanced Memory Card to expand conventional memory,  you would  set
SW1 to show 256K ram below the Extended Memory Card.

Examples: 256K Motherboard. 1MB on Enhanced Memory Card. All non-paged.
      1   2   3   4   5   6   7   8         1   2   3   4   5   6   7   8
SW1- ON  ON  ON  ON  ON  OFF ON  ON    SW2-ON  ON  ON  OFF ON  OFF OFF OFF

          256K Motherboard. 384K Non-paged, 640K paged.
      1   2   3   4   5   6   7   8         1   2   3   4   5   6   7   8
SW1- ON  ON  ON  ON  ON  OFF ON  ON    SW2-ON  ON  ON  OFF ON  ON  OFF ON

Using the SuperPak software:
     You  must enter in your config.sys DEVICE = AEMM.SYS in  order  for
the  PC  to  address  the paged memory.  This  makes  the  paged  memory
available  for  LOTUS or SYMPHONY types of programs that can  use  above
memory.   The  Superpak utilities can use either conventional memory  or
Extended  Memory.  You can not use memory set up as non-paged memory (by
the switch settings) for these utilities.  You must use the DEVICE = AEX
(nnn) command where (nnn) is at least the sum of the memory used by  the
Superpak programs.

Examples:
SUPERSPL LPT1:/EXTM  Will use the remainder of extended memory
                             for a print spooler for LPT1.

        SUPERSPL LPT1:/M=24  Will assign 24K of  extended  memory
                             for a print spooler for LPT1.

        SUPERDRV  C:/EXTM    Will  assign a  360K  Ram  Drive  in
                             extended
                             memory assigned to logical drive C:.

        SUPERDRV  D:         Will  assign  a  360K Ram  Drive  of
                             conventional   memory  assigned   to
                             logical drive D:.

        DEVICE = RAMDISK.DEV 512 512 64 /E
                 (In config.sys after DEVICE = AEX nnn command.)

                             Will  assign a 512K ramdisk with 512
                             byte  sector  size and 64  Directory
                             entries.  All  of  these  parameters
                             must  be in multiples of 16 or  they
                             will  round to the next multiple  of
                             16  value.  The  /E option puts  the
                             ramdisk  in  extended   memory.   To
                             create multiple ramdisks,  you would
                             use  multiple DEVICE=RAMDISK  state-
                             ments in your config.sys.

For  further  examples,  see  the READ.ME file on  the  SUPERPAK
utilities  diskette or the SUPERPAK manual that comes with the  Enhanced
Memory Board.
Note: The  /E  option  in  the examples is the same as the /EXTM
switch.   Once  the  /E option is enabled,  it will be assumed  for  all
following commands unless the /DEXTM switch is used.
Ŀ
                                                               
 AT&T PC6300 TECHNICAL BULLETIN                                
                                                               
 SUBJECT: Microsoft Word v3.0                                  
 PROVIDED BY:                                                  
                                                               


 The following instructions allow the AT&T PC6300 to work with
 Microsoft Word 3.0 in High Resolution 640x400 graphics mode.
 It is not possible to receive color in the High Resolution mode.

   1. Make a copy of the program disk.  Do not make changes to
      your original program disk.
   2. Put the copy of the program disk in drive A, and be sure
      DEBUG.COM is on your default drive/path.
   3. Type:  DEBUG A:WORD.COM <ENTER>
   4. A dash will appear on the next line.
   5. Type:  A 3B1A <ENTER>
   6. xxxx:3B1A will appear.
   7. Type:  JMP 3B3C <ENTER>
   8. xxxx:3B1C will appear.
   9. Hit <ENTER>, a dash will appear on the next line.
  10. Type:  W <ENTER>
  11. Writing xxxx bytes  will appear.
  12. Type:  Q <ENTER>, your DOS prompt will appear.


Ŀ
                                                                   
 AT&T PC6300 TECHNICAL BULLETIN                                    
                                                                   
 SUBJECT: Using the Central Point CopyIIpc Board in a PC6300       
 PROVIDED BY:                                                      
                                                                   


  The problem with the CopyIIpc Board has nothing to do with DMA or
  the DMA fix.  Central Point Software was given incorrect
  information from Olivetti, and set the board to access the DMA
  port dedicated to the Floppy drive.
  If a CopyIIpc Board owner has a new board, made after March 1986,
  there will be two jumpers in the lower right portion of the board
  marked DMA.  The fix is to move these jumpers to the LOWER
  position, then invoke with TC /C1 from the keyboard or batch file.
  If a user has an older board without these jumper positions,
  Central Point will replace it, at no charge, by calling the number
  for Central Point in the CopyIIpc Board manual.


Ŀ
                                                                    
                                                                    
 AT&T PC6300 TECHNICAL BULLETIN                                     
                                                                    
 SUBJECT:  Parallel and Serial Port Pinouts                         
 PROVIDED BY:                                                       
                                                                    


 PARALLEL PORT:

        Pin 1. STROBE
            2. PTD0   Ŀ
            3. PTD1        
            4. PTD2        
            5. PTD3          Data Lines
            6. PTD4        
            7. PTD5        
            8. PTD6        
            9. PTD7   
           10. -ACK      Acknowledge
           11. BUSY
           12. PE        Paper End
           13. SLCT      Select
           14. -AUTOFDX  Auto Feed
           15. -ERROR
           16. -INIT     Initialize Printer
           17. -SLCTIN   Select Input
           18. GND    Ŀ
           19. GND         
           20. GND         
           21. GND          Ground
           22. GND         
           23. GND         
           24. GND         
           25. GND    


 SERIAL PORT:

        Pin 1. PRGND  Protective Ground
            2. TD     Transmitted Data
            3. RD     Received Data
            4. RTS    Ready to Send
            5. CTS    Clear to Send
            6. DSR    Data Set Ready
            7. GND    Signal Ground/Common Return
            8. DCD    Data Carrier Detect
            9. 
           10. 
           11. 
           12. 
           13. 
           14. 
           15. 
           16. 
           17. 
           18. 
           19. 
           20. DTR    Data Terminal Ready
           21. 
           22. RI     Ring Indicator
           23. DTR    Data Terminal Ready
           24. 
           25. 


Ŀ
                                                                    
                                                                    
 AT&T PC6300 TECHNICAL BULLETIN                                     
                                                                    
 SUBJECT:  PC6300 Clock/Calendar                                    
 PROVIDED BY:                                                       
                                                                    


        There seems to be a number of people calling in to
        report slow clocks. There is a jumper plug
        located at C-9 on the motherboard. Make sure this
        is in place. If it is not there, charging the
        battery won't help. Provided it is there, the
        clock battery requires a charge of approximately
        72 hours before it will hold time. We usually
        suggest turning the intensity down during this
        time period, if the machine is not being used.



Ŀ
                                                                    
                                                                    
 AT&T PC6300 TECHNICAL BULLETIN                                     
                                                                    
 SUBJECT:  AT&T PC6300 Mini Floppy Drive Units                      
 PROVIDED BY:                                                       
                                                                    


    USING TWO FLOPPIES OF DIFFERENT MAKES
        We currently have three different types of disk drives

        Toshiba - door that flips down and can be ordered,

        Toshiba - latch that turns clockwise (centered) (is a
                  production model) and can't be ordered. If
                  found defective replace with an Olivetti
                  drive for cosmetic reasons.

        Olivetti - latch that turns clockwise (offset to left).

        These drives have their data connector in different
        places making it impossible to use the one MFD cable to
        connect them unless the machine is equipped with the
        100mm (new) cable as opposed to the standard 50mm (old)
        cable. This change was in affect approximately 1/1/85.
        You should determine which cable you have before
        ordering a different drive replacement. Of course a
        like replacement won't matter.



    MAX NUMBER OF DRIVES
        Our machine can support a maximum of TWO MFDUs.  Dip
        Switches for three and four drives are only useful for
        Ram Disks.



    DIP SWITCHES - DPSW-1 Location 7W on motherboard

        # of drives  |   SW-7  |  SW-8
        ------------------------------
              1      |     1   |   1
              2      |     0   |   1
              3      |     1   |   0
              4      |     0   |   0

        NOTE 3 AND 4 ARE ONLY FOR RAM DISKS



    96-TPI FLOPPY DRIVES

        MS-DOS does not have the power to use this feature even
        though there is a dip switch for it.  That switch is
        meant for future use and we do not support the 96-tpi
        feature.



Ŀ
                                                                    
                                                                    
 AT&T PC6300 TECHNICAL BULLETIN                                     
                                                                    
 SUBJECT:  Lock for the AT&T PC6300 and PC6300+                     
 PROVIDED BY:                                                       
                                                                    


       There is now a lock for the PC6300 and the PC6300+.
       This lock allows key control of the ON/OFF switch,
       preventing unauthorized use of the computer.  The lock will
       also keep the top and bottom cover from being removed
       without the key, protecting the cards in the top of
       the unit and the chips in the bottom of the unit.  The
       lock has a Underwriter's Laboratories listed Medeco key
       system, it's pickproof.

       The COMCODE for the AT&T Personal Computer External
       Security Lock is ---- 405078585.



Ŀ
                                                                    
                                                                    
 AT&T PC6300 TECHNICAL BULLETIN                                     
                                                                    
 SUBJECT:  Null Modem Cable Pin Configuration                       
 PROVIDED BY:                                                       
                                                                    


              TYPICAL NULL MODEM CABLE
                    1 ----- 1
                    2 ----- 3
                    3 ----- 2
                    4 ----- 5
                    5 ----- 4
                    7 ----- 7
                    6 ----- 20
                   20 ----- 6

    NOTE THIS IS NOT A TYPICAL SET UP FOR THE 6300.
    WE USUALLY HAVE 6 & 8 TOGETHER GOING TO 20.




Ŀ
                                                                    
                                                                    
 AT&T PC6300 TECHNICAL BULLETIN                                     
                                                                    
 SUBJECT:  Remedies for Common Keyboard Problems                    
 PROVIDED BY:                                                       
                                                                    


    KEYBOARD CONTAMINATION
       Many calls are received regarding a keyboard key or keys
       not working properly. This is usually due to some foreign
       material lodged between the contact on the circuit card
       and the carbon contact on the bottom of the key plunger.
       Generally, these problems can be resolved by the customer.

          1. Remove the key cap by gently prying under the
             edge of it.
          2. Release the two catches that hold the key in place.
          3. At this point the key mechanism will come out in
             one piece.
          4. Clean both the bottom contact of the key and the
             contact on the circuit card. Use some type of swab
             and a cleaner if possible. Be careful not to
             introduce new contamination.
          5. Reinsert the key and replace the keycap.
          6. If not successful, replace the keyboard.



    LOOSE SCREWS
       There are approximately a dozen screws that hold the bottom
       plate of the keyboard on (metal plate). If one or more come
       loose it will cause keys to not make proper contact with the
       circuit card, getting no response. This is usually indicated
       when several keys in the same area don't work. Open the
       keyboard and tighten all of the screws.


Ŀ
                                                                    
 AT&T PC6300 TECHNICAL BULLETIN                                     
                                                                    
 SUBJECT: UNIX System V Documentation                               
 PROVIDED BY:                                                       
                                                                    


 There have been a number of questions from customers who have
 received their UNIX software for their PC6300+.  One question has
 to do with a book known as the USER'S REFERENCE MANUAL/SYSTEM
 MAINTENENCE MANUAL.  This book is NOT included with the standard
 issue of UNIX, but must be purchased through the Documentation
 Hotline, eventhough it contains all the vanilla UNIX commands.

 Another UNIX System V book for the PC6300+ is the INTEGRATED
 SOFTWARE DEVELOPMENT GUIDE.  This has guidelines for writing
 device drivers, etc.

      BOOK TITLE                         COMCODE


      USERS REFERENCE MANUAL/
      SYSTEM MAINTENENCE MANUAL         105152771

      INTEGRATED SOFTWARE
      DEVELOPMANT GUIDE                 105152789


 The phone number for the Documentation Hotline is 800-432-6600.


Ŀ
                                                               
 AT&T PC6300 TECHNICAL BULLETIN                                
                                                               
 SUBJECT: UNIX and the Western Digital Hard Disk Controller    
 PROVIDED BY:                                                  
                                                               


 UNIX will not load on the PC6300Plus if the PC has a Hard Disk
 Controller with an on-board PROM.  UNIX will only look at the
 motherboard ROM for its hard disk parameters.  It appears that
 MOST dealers are selling the PC6300Plus with a Western Digital
 Controller Card with an on-board PROM chip.  In order for UNIX
 to load, the on-board PROM must be removed, and the Plus must
 be re-optioned to read the parameters on our motherboard.

Ŀ
                                                                       
  AT&T PC6300 TECHNICAL BULLETIN                                       
                                                                       
  SUBJECT:  Removing MS-DOS software from UNIX office system           
  PROVIDED BY:                                                         
                                                                       


                             UNIX NOTES ON THE 6300+
                             -----------------------

       If a person wishes to remove an MS-DOS based software package that
   they installed through the install software procedure, they can follow
   the method below to do just that:

   <1> Go to Administration Section of Main Office window
   <2> Then select Software Set-Up
   <3> Then select Program Administration
   <4> It will then show you a list of files, highlight your choice
   <5> The last feature it will show you will be to list the filename in
       the Programs Main Menu (Y/N)?  -- Choose N  (press F6 - To Save)
   <6> At this point it will no longer appear in the programs menu
   <7> You then must also make the following changes:
   <8> Go to a Unix prompt and cd /usr/lib/ua and edit the file showsoft.mn
       make sure that you take the line out that contains that entry.
   <9> Now cd /usr/lib/office and edit the file programs. Make sure that
       the proper line is taken out of the file.
  <10> Now all you have to do is to cd to the proper directory where the
       files are stored and erase them and the directory.
  <11> ***NOTE: You must change the attributes of the sub-directory for
       which you are going to remove. Ex. If you are going to remove the
       word directory you must change the attributes on it to Write by
       doing the following: chmod guo+w word <cr> and then you will be able
       to go into simultask and erase it.

       Thats It!! You no longer will see that Program listed anywhere in
   your menu's or directories.


Ŀ
                                                                    
                                                                    
 AT&T PC6300 TECHNICAL BULLETIN                                     
                                                                    
 SUBJECT:  Using the DOS PROMPT Command                             
 PROVIDED BY:                                                       
                                                                    


    ANSI.SYS
       To make full use of the PROMPT command, you must have
       ansi.sys in your config.sys file (device=ansi.sys) and
       both must be in the root (boot) directory (or specify
       full path name).



    PROMPT
       The example of the PROMPT command on page 5-69 is
       incorrect. Both brackets should be right facing ([).
       Also, this command will not give the required results,
       after one full screen, the entire display will be
       inverse video, not just the cursor.



    KEY PROGRAMMING
       An example of programming keys with the PROMPT command
       is... "PROMPT $E[0;59;"dir";13p".  The "$E" defines
       that what is to follow is to be accepted literally, the
       "[" starts the beginning of the code, the "0" is a
       necessary null variable (this position is usually
       defined for cursor positioning in other operations),
       the "59" is the keyboard scan code for the F1 key
       (59-68=F1-F10), "dir" in quotes is the string that you
       insert for execution, and "13p" is the decimal value
       for a carriage return to execute the string. Note that
       this example will erase any prompt that you are
       currently using. If keys are reprogrammed using PROMPT,
       the reprogrammed values may be passed on to programs,
       instead of the default keyboard scan codes.



    USE OF $p IN PROMPT
       Used to display pathname of current directory as part
       of your prompt. If the A drive is selected as your
       default drive and the diskette is removed, any attempt
       to execute DOS commands (resident or otherwise)
       results in an "abort, retry, ignore" error message. The
       system then requires a disk in the A drive to continue.
       The reason is the $p causes a search for the default
       drive pathname each time it writes information to the
       prompt. Omitting the $p from the prompt eliminates this
       problem.



Ŀ
                                                                   
 AT&T PC6300 TECHNICAL BULLETIN                                    
                                                                   
 SUBJECT: Borland Tech Bulletin #313 - Sidekick 1.56A Patch        
 PROVIDED BY: Borland International                                
                                                                   


 The following information is part of Borland's Tech Info Bulletin
 number 313.  For complete documentation, contact Borland
 International at 408-438-8400.  This patch applies ONLY to version
 1.56A of Sidekick, both the copy-protected and non-copy-protected
 versions.  If you do not receive the appropriate response from
 these commands, enter Q and check your version number.

 NON-COPY PROTECTED VERSION PATCH

       TYPE                     THIS APPEARS
            

       debug SK.COM <ENTER>     -
       a 1380 <ENTER>           xxxx:1380
       jmp 1394 <ENTER>         xxxx:1382
       <ENTER>                  -
       w <ENTER>                writing xxxx bytes
       q <ENTER>                DOS prompt

       debug SKN.COM <ENTER>    -
       a 135E <ENTER>           xxxx:135E
       jmp 1372 <ENTER>         xxxx:1360
       <ENTER>                  -
       w <ENTER>                writing xxxx bytes
       q <ENTER>                DOS prompt

       debug SKC.COM <ENTER>    -
       a 126A <ENTER>           xxxx:126A
       jmp 127E                 xxxx:126C
       <ENTER>                  -
       w <ENTER>                writing xxxx bytes
       q <ENTER>                DOS prompt

       debug SKM.COM <ENTER>    -
       a 121D <ENTER>           xxxx:121D
       jmp 1231 <ENTER>         xxxx:121F
       <ENTER>                  -
       w <ENTER>                writing xxxx bytes
       q <ENTER>                DOS prompt



 COPY PROTECTED VERSION PATCH

       TYPE                     THIS APPEARS
            

       debug SK.COM <ENTER>     -
       a 1396 <ENTER>           xxxx:1396
       jmp 13AA <ENTER>         xxxx:1398
       <ENTER>                  -
       w <ENTER>                writing xxxx bytes
       q <ENTER>                DOS prompt

       debug SKN.COM <ENTER>    -
       a 1374 <ENTER>           xxxx:1374
       jmp 1388 <ENTER>         xxxx:1376
       <ENTER>                  -
       w <ENTER>                writing xxxx bytes
       q <ENTER>                DOS prompt

       debug SKC.COM <ENTER>    -
       a 1280 <ENTER>           xxxx:1280
       jmp 1294 <ENTER>         xxxx:1282
       <ENTER>                  -
       w <ENTER>                writing xxxx bytes
       q <ENTER>                DOS prompt

       debug SKC.COM <ENTER>    -
       a 1233 <ENTER>           xxxx:1233
       jmp 1247 <ENTER>         xxxx:1235
       <ENTER>                  -
       w <ENTER>                writing xxxx bytes
       q <ENTER>                DOS prompt


Ŀ
                                                                
 AT&T PC6300 TECHNICAL BULLETIN                                 
                                                                
 SUBJECT: Sidekick Setup for AT&T 4000 Modem                    
 PROVIDED BY:                                                   
                                                                


 There are two types of AT&T 4000 Modems, each requiring a
 different setup with Sidekick.  The first, 1AO1, uses the AT&T
 command set to dial, and should be setup accordingly in Sidekick.
 The 1AO2 requires the Hayes setup option.  This holds true for
 any other AT&T modem that uses the Hayes command set, such as the
 4112 and 4024 modems.
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