r200fix doesn't work (with Jazz Jackrabbit)

[jschwartzenberg]

See: dosemu2/dosemu2#2303 (comment) and the follow up.

Download location for the game: https://www.dosgamesarchive.com/file/jazz-jackrabbit/jazz

[stsp]

Do you happen to know a
simple runtime 200 test-case?

[stsp]

Also is this a problem with comcom32 too?

[stsp]

Oh, I suspect r200fix works
only with realmode progs,
so perhaps the simpler test-case
doesn't exist...

[jschwartzenberg]

Any program that relies on crt.asm would fail I guess? Maybe we could try to build a simple program.
Here is more info: http://www.kennedysoftware.ie/patchcrt.htm

[stsp]

Would be good if you try, as
I think this will fix realmode
program.

[andrewbird]

I thought it might be good to create a minimal test for runtime error 200. I followed the link above and itself links to here which suggests that problem crt.asm is in versions <= 6. So I made a minimal pascal file as below

program Hello;
{ Minimal program }

begin
  WriteLn('Hello');
end.

and compiled as tpc hello.pas with turbo pascal 5.5, but it runs without error. I'm running FreeCOM with FDPP, is there any magic fixup going on?

[andrewbird]

Note I also added uses crt; but it still runs okay.

[stsp]

Maybe just uses crt is not enough -
you need to use it?
There seem to be the test-case from
@stuaxo
dosemu2/dosemu2#808

[andrewbird]

Yes that example you linked failed with runtime error 200.

I compiled my test program with TP5.5, TP6.0, and TP7.0, and only the TP7.0 version generated the error. Interestingly the TP7 came with patch files for the CRT unit. I'm not sure of the provenance of those disks as they came from Winworldpc and they may have been altered to include the patch files.

I will now test with Borland Pascal.

[stsp]

So can the failed example be fixed with r200fix? Пятница, 21 февраля 2025 г получено от Andrew Bird:

…

andrewbird left a comment (dosemu2/comcom64#105) Yes that example you linked failed with runtime error 200. I compiled my test program with TP5.5, TP6.0, and TP7.0, and only the TP7.0 version generated the error. Interestingly the TP7 came with patch files for the CRT unit. I'm not sure of the provenance of those disks as they came from Winworldpc and they may have been altered to include the patch files. I will now test with Borland Pascal. -- Reply to this email directly or view it on GitHub: #105 (comment) You are receiving this because you commented. Message ID: ***@***.***

[andrewbird]

Yes (tp7.0), but I have to try the 7.01 version as according to the patch file a different patch is needed for that

[andrewbird]

r200fix is also able to fix tp 7.01 executables. I did notice that the example from dosemu2/dosemu2#808 seems to be packed somehow. Maybe that's defeating the fix?

[stsp]

I think dpmi is defeating a fix. Try building for prot mode in BP7. Пятница, 21 февраля 2025 г получено от Andrew Bird:

…

andrewbird left a comment (dosemu2/comcom64#105) r200fix is also able to fix tp 7.01 executables. I did notice that the example from dosemu2/dosemu2#808 seems to be packed somehow. Maybe that's defeating the fix? -- Reply to this email directly or view it on GitHub: #105 (comment) You are receiving this because you commented. Message ID: ***@***.***

[andrewbird]

I think dpmi is defeating a fix.

Yes same program compiled for 'dos protected mode' still fails with runtime 200 error even with r200fix.

BTW my pascal knowledge is very old/forgotten, do you know how to reference a 'define' inside the program? I want to compile each test program and pass in a string. I see that you can do tpc -Dsomething, but how to add that into a string constant defeats me. I want each test program to print a unique string for capture by the test suite.

[andrewbird]

ooh, Claude showed me a way. Have to see if it's true now.