Jim Ryan Fido 141/9 Patches for IBM PC-DOS 3.20 (adapted from Compuserve PC SIG) These patches were developed based on the file DOS31V2.PAT file distributed by the CompuServe PC-SIG. Most patches have been tested (except where noted). I would like to take this opportunity to thank the people who originally developed these patches. I am grateful that they took the time to develop and distribute them. **************************************************************************** Enviorment Size The patch for changing enviorment size in DOS 3.20 is as follows (original patch by Bob Morse) : DEBUG COMMAND.COM -E 0D4F xxxx:0D4F 0A.3C -W -Q (Use 1E for a 544 byte enviorment, 3C for a 1k enviorment) **************************************************************************** Automatic Installation of printer for DOS PRINT The patch to disable the printer port prompt in DOS PRINT is as follows: DEBUG PRINT.COM -E 190D xxxx:190D E8.90 D6.90 02.90 -E 191f xxxx:191F CD.90 21.90 -W -Q To change the default printer port (to something other than PRN), add the following command: -E 11C2 4 "LPT2" **************************************************************************** Disable automatic header in FIND.EXE output (UNTESTED) The FIND program puts an automatic header line in the output listing. To disable this feature, use the following patch: REN FIND.EXE FIND.XXX DEBUG FIND.XXX -E 0427 -xxxx:0427 03:2C -W -Q REN FIND.XXX FIND.EXE **************************************************************************** Permit more than 10 mismatches in COMP.COM (UNTESTED) The SigOp of the CompuServe PC SIG developed a patch to permit 50 mismatches in COMP.COM . The patch for DOS 3.20 is as follows: DEBUG COMP.COM -E 0AF3 xxxx:0AF3 0A.32 -E 0E09 xxxx:0E09 31.35 -W -Q **************************************************************************** Echo Off Again, the SigOp of the CompuServe PC SIG developed a patch to make ECHO OFF the default in batch files (probably my most favorite patch). The patch for DOS 3.20 is as follows: DEBUG COMMAND.COM (to make ECHO OFF the default in batch files, enter the next two lines) -E 1B2C xxxx:1B2C 01.00 (to make ECHO OFF the default in AUTOEXEC.BAT, enter the next two lines.) (This patch is courtesy of Calvin R. Shields of PC Magazine.) -E 115E xxxx:115E 03.02 -W -Q **************************************************************************** Allowing blank lines in batch files In earlier versions of DOS (2.xx), you could echo a blank line by using ECHO (spaces). This was removed in DOS 3.xx . The patch to enable blank lines in batch files in DOS 3.20 is as follows: DEBUG COMMAND.COM -E 3A88 xxxx:3A88 E8.83 20.F9 00.02 74.72 -W -Q This patch was originally developed by Calvin R. Shields from PC magazine. **************************************************************************** The rest of the patches for DOS 3.2 are the same as the one's used for DOS 3.10 . ****************************************************************************