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dosemu2 / comcom64

64bit command.com
https://github.com/dosemu2/comcom32/
GNU General Public License v3.0
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Command line tail in PSP is not same as MSDOS or DRDOS #34

Closed andrewbird closed 4 years ago

andrewbird commented 4 years ago

Printing the PSP from MSDOS 6.22 or DRDOS 7.01 shows the command line tail is prefixed with a space, whereas on FDPP with comcom32 it is not. Changing to use Freecom under FDPP gives a similar result to MS/DR DOS.

MS-DOS 6.22

122f:0080 05 20 54 45 53 54 0D 53 45 4D 55 5F 56 45 52 53  . TEST.SEMU_VERS

FDPP/Freecom from FreeDOS 1.20

1cc1:0080 05 20 54 45 53 54 0D 00 32 35 36 0D 0A 00 00 00  . TEST..256.....

FDPP/comcom32

0f09:0080 04 54 45 53 54 0D 50 05 08 00 00 01 08 05 00 02  .TEST.P.........
stsp commented 4 years ago

Is this a problem of djgpp libc? Does it cause any troubles?

andrewbird commented 4 years ago

Mmm I'm not sure about libc, if it is I don't think I'll pursue it as I'm only looking for FDPP/Dosemu problems.

Does it cause any troubles?

Not any proper ones that I know of. I'm seeing it only because a wrote a test in the test suite to validate certain PSP fields after int21/26. If you think it's okay for it to be different I can make the test more lax and close this issue?

stsp commented 4 years ago

I think I was wrong about libc. Applied the completely untested patch, please see if it does the trick.

andrewbird commented 4 years ago

Thanks, the test passes now.