Hi,
I can't reproduce the hang with the dosidle program linked by Sebastian. (I ran the program on freedos and on an msdos floppy and both times it said it install succesfully.) Can someone walk through the steps needed to reproduce the problem?
I found some old Win3.1 images, and I do see the failure running setup on that (when run from dos 6). I'll look into it.
Sebastian, can you document the steps to reproduce the dosidle and display.sys failure? (I tried putting display.sys into a dos6 config.sys, but it doesn't like my parameters so I don't think it's doing anything.)
I cloned the git repository, and built with: $ ./configure --target-list=i386-softmmu $ make -j2
I then installed MS-DOS onto a virtual 50 MB disk, all default settings: $ /tmp/qemu/i386-softmmu/qemu-system-i386 -m 4 -hda msdos.img -fda MS-DOS_1.IMG
After rebooting, qemu hangs with 100% cpu usage when loading DISPLAY.SYS. It is loaded by the following line in CONFIG.SYS:
DEVICE=C:\DOS\DISPLAY.SYS CON=(EGA,,1)
Surprisingly, this hang occurs with all of MS-DOS 5.00, 6.20 and 6.22 (German), but not with a Russian MS-DOS 6.22 (which appears in english). I don't have any other language version of DOS to test with, though.
Best Regards, Sebastian