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EDR-DOS development (Announce)

posted by ecm Homepage E-mail, Düsseldorf, Germany, 29.08.2023, 18:26

> 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.
I also built a HDD image like so: (This is a small FAT32 image, which is why a recent mtools is required. I downloaded it from GNU and built using ./configure then make commands. I did this to test that EDR-DOS works with a small FAT32 image.)

~/proj/edrdos$ hg clone repo selbau
updating to branch default
168 files updated, 0 files merged, 0 files removed, 0 files unresolved
~/proj/edrdos$ nasm -I ../lmacros/ ../bootimg/bootimg.asm -D_BPE=32 -D_ERROR_SMALL32=0 -D_MBR -D_ALIGNDATA -D_MEDIAID=0F8h -o selbau.img -D_SPI=256_000 -D_SPF=128 -D_SPC=16 -D_CHS_HEADS=16 -D_CHS_SECTORS=32 -D_PAYLOADFILE=::empty
../bootimg/bootimg.asm:472: warning: Too many FAT sectors specified (16384 entries (128 sectors), 15985 needed (125 sectors)) [-w+user]
../bootimg/bootimg.asm:523: warning: FAT would be detected as FAT16 (15983 = 3E6Fh clusters) [-w+user]
~/proj/mtools/mtools-4.0.43/mcopy -i selbau.img@@512s selbau/* ::

Then run dosemu2 with the HDD image configuration: -I "disk { hdimage /home/ecm/proj/edrdos/selbau.img }". Again set the OpenWatcom 1.9 variables for C:\WATCOM, then run each make.bat. (I think it will use the FreeDOS subst.exe that I have in C:\bin.)

After building, copy the files back to the host like so:

~/proj/edrdos$ mkdir selbau.res
~/proj/edrdos$ ~/proj/mtools/mtools-4.0.43/mcopy -i selbau.img@@512s ::drbio/bin/drbio.sys ::drdos/bin/drdos.sys ::command/bin/command.com selbau.res/

Finally, compare the files using bdiff like so:

~/proj/edrdos/dl$ for file in drbio/bin/drbio.sys drdos/bin/drdos.sys command/bin/command.com; do ls -l "../selbau.res/${file##*/}"; bdiff "../selbau.res/${file##*/}" "../repo/$file"; done
-rw-r--r-- 1 ecm ecm 35495 Aug 29 18:22 ../selbau.res/drbio.sys
File: ../selbau.res/drbio.sys
Files are identical.
-rw-r--r-- 1 ecm ecm 36973 Aug 29 18:22 ../selbau.res/drdos.sys
File: ../selbau.res/drdos.sys
Files are identical.
-rw-r--r-- 1 ecm ecm 63521 Aug 29 18:22 ../selbau.res/command.com
File: ../selbau.res/command.com
Files are identical.

---
l

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