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ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
08767 Crash/Freeze Critical (emulation) Always Sep 21, 2023, 02:18 Sep 21, 2023, 10:23
Tester Davidian1024 View Status Public Platform MAME (Self-compiled)
Assigned To Resolution Open OS Linux (64-bit)
Status [?] Acknowledged Driver
Version 0.258 Fixed in Version Build 64-bit
Fixed in Git Commit Github Pull Request #
Summary 08767: ct486: Emulated system locks up when attempting to boot MS-DOS 6.22 Setup Disk
Description When booting into the MS-DOS 6.22 disk 1, the system hangs at the moment when the setup program would normally first appear.
Steps To Reproduce Boot the ct486 driver and configure a single 1.44MB floppy drive.
Configure flop1 with MS-DOS 6.22 Disk 1 [rom name="disk1a.img" size="1474560" crc="69d8cfdd" sha1="30b4b2e99b26b0e5e7dbe61b9892e45fe751a3e8"]
Boot the system again with this configuration and don't press any keys.
Observe that the Starting MS-DOS... message appears and that floppy drive activity can be heard, but once floppy drive activity stops, the initial setup program screen never appears. The cursor only continues to blink as it had been, but nothing else on screen changes.
Additional Information When booting off of the MS-DOS 6.22 Setup Disk from floppy drive A: the emulated system will hang just a moment or two after displaying the Starting MS-DOS... boot message.
The boot up involves the usual startup through BIOS, including memory test and emulated floppy drive loading sounds.
Pressing ctrl+alt+delete will not cause the system to reboot once the hang has occurred. It works before the hang occurs. You can tell when the hang has occurred once the floppy drive sounds have stopped.
The cursor will continue to blink onscreen and the floppy can still be heard steadily whirring.
This was reported previously here:
Clearing the NVRAM makes no difference.
I have the system configured with a single 1.44MB floppy as drive A: No hard drive.
Beyond the F8 workaround mentioned in the previous report, I've noticed that repeatedly pressing any key starting just before the Starting MS-DOS... boot message appears seems to prevent the hang. The system manages to load the setup program if you do this.
Github Commit
Regression Version
Affected Sets / Systems ct486
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