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EDR-DOS development (Announce)

posted by ecm Homepage E-mail, Düsseldorf, Germany, 29.08.2023, 17:49

> I have one question like this. Why have I never been able to build an
> EDR-DOS kernel by running BAT files on a system other than FreeDos?
> RASM86.EXE seems to use FCB functions that have been deprecated from M$DOS
> and are only in FreeDos. Do the FCB functions work in EDR-DOS? I ask
> because when I try to build an EDR-DOS kernel in a system other than
> FreeDos (also in EDR-DOS itself) I get the message: "Sector not found
> reading drive ?:" - ? - drive number here (C drive when building on C, and
> drive Y when building on RAMDISK Y).
I just updated my EDR-DOS repo on the local machine (running a recent dosemu2 with KVM, on a Debian amd64 desktop system) and booted my EDR-DOS + dosemu2 diskette image. Using the mak.bat file wouldn't work because of the required SET /E switch (FreeCOM specific), but instructing dosemu2 with the explicit lredir -f i: ... command, then setting the OpenWatcom variables (from C:\WATCOM) then running the make.bat in each directory, I get the exact same result files as on FreeDOS.

Actually, I noticed that to non-interactively overwrite a file using COPY, FreeCOM requires the COPY switch /Y, while EDR-DOS command defaults to overwriting. I added a /Y switch to EDR-DOS, which is a no-op by default. (It does override /C if both are used.) This makes my modified make.bat files fully work on both shells.

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