DOS ain't dead

I never think I made a DOS program in 2025.

patcherfcb(patchfcb) is a program to (reverse) apply (binary) patch from output of DOS command "fc /b".
It is forked from http://seanriddle.com/patcherfcb.c with some fixes, and I added reverse-patching function to it.

src+bin: http://o.rthost.win/gpc/files1.rt/patcherfcb.zip
repo: https://github.com/roytam1/rtoss/tree/master/patcherfcb

to compile:
- for DOS version, I used MSC 8.0 with command "CL /AT /O2 patcherfcb.c" to produce PATCHFCB.COM
- for win32 version, I used MSVC 2.2 with command "CL /O2 patcherfcb.c" to produce patcherfcb.exe

Also, someone have archive of old .crk files? (was wide published in Fido and bbs)

---
Make DOS great again!
Make Russia small again!

> patcherfcb(patchfcb) is a program to (reverse) apply (binary) patch from
> output of DOS command "fc /b".
> It is forked from http://seanriddle.com/patcherfcb.c with some fixes, and I
> added reverse-patching function to it.

I had my own BINHACK.C on MetaDOS, with examples, that worked similarly, primarily run via DJGPP build of PICOC.

I also wrote a much-smaller BYTEFIX program in NASM to only change one byte at a time. It was 512 bytes.

> > patcherfcb(patchfcb) is a program to (reverse) apply (binary) patch from
> > output of DOS command "fc /b".
> > It is forked from http://seanriddle.com/patcherfcb.c with some fixes, and
> I
> > added reverse-patching function to it.
>
> I had my own BINHACK.C on MetaDOS, with examples, that worked similarly,
> primarily run via DJGPP build of PICOC.
>
> I also wrote a much-smaller BYTEFIX program in NASM to only change one byte
> at a time. It was 512 bytes.

yeah, but I want `--dry-run` and `--reverse` and run on win32(running on DOS is extra for me) so patcherfcb is easier for me to hack on.

Sorry for the grumbling, but https://en.wikipedia.org/wiki/File_Control_Block

---
Make DOS great again!
Make Russia small again!