Big-DOS Copyright ½ 1995 by Rainer Seitel Big-DOS is freeware. For details and the content of this package refer to bigdos.txt! Features -------- Big-DOS is an ISO 9293 filesystem that replaces the GEMDOS of TOS (not MagiC!). ù GEMDOS / ISO-9293:1987 / MS-DOS filesystem ù 32 Drives: A..Z1..6 or A..Z[\]^_` ù Up to 65518 cluster. ù 1 to 64 sectors per cluster. ù More than 65535 sectors and therefore every MS-DOS partition with 512-byte sectors possible. That means also more than 32 Mbyte. ù 1 or 2 FAT. ù The legal characters are resticted for GEMDOS, d-characters as in ISO 9293 resp. ISO 9660 or MS-DOS. You know in advance, that a MS-DOS computer or a restictive cd-writing software can read all files. ù The disk label will also be written to an MS-DOS boot sector. ù Works with or without MiNT. ù Big-DOS tries to lock removable cartridges using XHDI. ù For TOS 1.04 and 1.06 no POOLFIX3.PRG, PFIX_CB.PRG or POOLFX92.PRG is needed. ù 122 standard handles fore open files, instead of 75. ù Cookies ¯DATE® and ¯TIME® as in DTCOOKIE and LED-Panel. ù Shows names of the loaded accessories. ù All GEMDOS Functions of TOS including Srealloc(). Srealloc() at present shows debug informationen. ù For very old programms, as ¯Alcyon C®, Cconws() is converted from CP/M-68K to GEMDOS. ù Aborting a tos programm by Control-C returns EBREAK (-68) instead of EINVFN (-32) like KAOS and MagiC. ù Mxalloc() ignoreres memory protection bits. ù Maddalt() takes memory with address below 16$ 40 0000 as ST-RAM. ù Sync() writes all buffers. ù Own Dcntl() opcodes as shown in dateisys.txt and FUTIME and KER_DOSLIMITS. With Dcntl(FUTIME, ...) date and time of a directory could be changed (e. g. by a backup program). ù Fattrib() can clear a from MS-DOS wrongly set archiv bit of disk labels. You can also change hidden and system bits of directories. DESKTOP, Gemini or Selectric, e. g. shows them only if you wish hidden files. ù Dlock() at present returns EACCDN if there are open files, EINVFN else. ù Dpathconf() ù Sysconf() ù Fxattr() returns as ¯Inode® the start cluster or - for an empty file - start cluster of directory + byte-position in the directory * 2^11. Installing Big-DOS ------------------ To install Big-DOS, put it before MetaDOS¿ and MiNT (if you use them) in your AUTO folder. After rebooting, all should work normal. For MS-DOS partitions bigger than 32 Mbyte, you also need a hard disk driver which can handle big MS-DOS partitions (type 6) and allows access to more than 65535 sectors via Rwabs(). Beside AHDI this should be a driver with XHDI 1.20, because Big-DOS tries to change the DOS limits via XHDOSLimits(). This could be checked with XHDItest.ttp. For Atari's AHDI 6.061 a binary diff is included. (You need `Binary Patch' from Robert Federle. Search for `bptch1??.*' or `bdiff???.*'.) Place AHDI.PRG and BINPATCH.TTP the directory of Big-DOS. Then start BINPATCH.TTP with the parameter `ahdi6061.bdf'. If you dont boot with AHDI, you can copy AHDIBIGD.PRG to your AUTO-Folder for testing. If you boot AHDI, you have to rename SHDRIVER.SYS on your boot partition and then copy AHDIBIGD.PRG to the root directory and rename it to SHDRIVER.SYS. If you dont use Big-DOS further, you have to remove the patched AHDI, avoiding that incompatible partitions were offered to TOS! You have been warned! For bug reports see XHDItest.ttp! Drivers, I had tested and version for good co-working: ù AHDI 6.061 with my patch, AHDI6061.ZIP Doesn't check DOS limits, doesn't lock removable cartridges. ù HDDRIVER 4.51, demo version HDDRIV45.ZIP Checks DOS limits, locks removable cartridges. ù CBHD 4.50, CBHD451.TOS at BBS MAUS SZ, +49 5341 852024, analog und ISDN X.75 Checks DOS limits, doesn't lock removable cartridges. Diverses -------- DOSMODE.TOS shows and alter the legal characters for filenames on each drive: GEMDOS: A..Z0..9!#$%&'()-@^_`{}~"+,;<=>[]| and capital umlauts ISO: A..Z0..9_ MS-DOS: A..Z0..9!#$%&'()-@^_`{}~ and capital umlauts XHDITEST.TTP shows for all or a given drive letter the partition size, name and XHDI version of the hard disk driver and tests the DOS-limits function: :-( not available :-/ available, but could not change the limits :-) available and could change the limits With ¯>® as last argument, the standard output will be stored in xhditest.log. With ¯>file® in the given file. Please include this file to your bug report. The only disk monitor for Atari's I know, that can handle MS-DOS partitions bigger than 32 Mbyte is the SED 5.66 from Anton Stepper and Claus Brod. It was selled with the german book ¯Scheibenkleister - Massenspeicher am ST®. And even this one needs a patch. You need the original source code, a GFA-BASIC interpreter 3.5 or 3.6 and the second version of my ¯sed_566diffs.zip®. Known problems of other programs -------------------------------- ù Getbpb() of TOS doesn't use the value ¯reserved sectors including boot sector® from the boot sector of floppy disks, but adding 1. So don't blame Big-DOS for the miss of this ISO 9293 feature. ;-) ù During my tests, the ICD driver only pretend to work with MS-DOS media, but it doesn't work! ù CHK_OFLS up to 1.02 crashes. ù Ddelete() cannot delete a current directory, but returns ECWD (-47) instead. Geminis Mupfel 1A ignores this, and without Big-DOS the deleted directory still is its current one. Only NEWDESK of TOS 2.05 to TOS 4.04 is alowed to delete its current directorys. Grrr! ù Fattrib(, , attrib) is a 16-bit parameter! If undefined bits were set, EACCDN (-36) is returend. ù If a program tries to create a file or directory with an illegal character, and ignores EBADRQ (-5), it probably crashes. ù Applications, which manipulate the memory management using undocumented variables, won't work. ù With HDDRIVER up to 4.50, changes of the XHDI DOS limits works only after a media change. So insert MS-DOS media after the Desktop has started or update to 4.51. The new version also set the correct media byte. There are several Programs that initialize the filesystem not correct. By the first access or after a media change, an error message is printed on the screen. If you type J or Y for yes the correct value will be written on disk. Contact the responsible programmer and tell him about the bug. BigDOS: FAT start of A: shall be ¯media®, $FF, $FF [$FF]! Write? [JYN] BigDOS: Media byte in FAT of A: is $00, shall be $00! Write? [JYN] BigDOS: Media byte in boot sector of A: is $00, shall be $00! Write? [JYN] New versions ------------ e-mail: MausNet: Rainer Seitel @ KA Internet: Rainer_Seitel@ka.maus.de (prefered, no mail > 16 Kbyte per day!) Rainer.Seitel@stud.uni-karlsruhe.de Source of supply: MAUS Karlsruhe, +49 721 358887, 2400-28800 bps, 07:00Z/17:00 and 20:00Z/02:00 http://www.uni-karlsruhe.de/~Rainer.Seitel/bigdos.html http://wwwrzstud.rz.uni-karlsruhe.de/~ujo7/bigdos.html (http://129.13.95.1/~ujo7/bigdos.html) News ---- In bigdos02: ù Problems with TT and Falcon fixed. In bigdos03: ù Partitions whith BPB.numcl == 0 will be ignored. ù No crash if HDDRIVER is started before Big-DOS. ù XHDItest.ttp with german Text if _AKP = $??????01??, else english. In bigdos04: ù Mshrink() works with Alternate-RAM. In bigdos05: ù Protected Minix Partitions or Disks will be ignored. ù Drive checking in Dpathconf() corrected. Mupfel ls without path works. ù Fxattr() correded. ù XHDItest.ttp can store to a file and use also Getbpb(). ù XHDOSLimits() only at start, instead before every Getbpb(). Geplant: ù NUM_FILEHANDLE -= 28, da MetaDOS¿ Handles ab 100 vergibt?