lotto@wjh12.harvard.edu (Jerry Lotto) (01/04/88)
The following patches have been posted for versions of MS-DOS up to
and including 3.2. After some rooting around in 3.3 (from IBM), I
think that I found the appropriate locations for the same mods. ####
below is the segment address and will vary with your configuration.
Echo off by default in batch files:
C:\> debug COMMAND.COM
-e 1D68
####:1D68 01.00
Control-U and Control-W line editing:
C:\> debug IBMDOS.COM
-a 211b
####:211B jz 217b ; replaces 2 NOPS
####:211D
-a 211f
####:211F jz 2172 ; replaces 2 NOPS
####:2121
The most reliable way to patch IBMDOS.COM is to unprotect and unhide
it ON A DISKETTE. Do the patch with debug, save and reset the
attributes. Boot from the floppy and test. If everything works, use
the DOS utility SYS to move the diskette system onto your hard disk if
you need to. A COPY of COMMAND.COM can be patched directly.
NOTE: These are not tried and true patches, I just worked them out
using the 3.2 patches as a template and tried each once. Precautions
should be taken against bad side effects until these are a little
older. Also, standard care about not relocating IBMDOS.COM on the
disk, backing up the original files, not blaming me if something goes
wrong should be taken.
--
Gerald Lotto - Harvard Chemistry Dept.
UUCP: {seismo,harpo,ihnp4,linus,allegra,ut-sally}!harvard!lotto
ARPA: lotto@harvard.harvard.edu