Legacy Windows 9x machines no longer boot for v4.7.1 Beta on macOS

[rshuston]

Describe the issue
I have legacy Windows 95/98/Me virtual machines that allow me to play old games. They were put together under UTM v4.6.5 on macOS. When I try to run them under UTM v4.7.1 (Beta), I get blue screens at bootup. I know the version of QEMU was updated, so is there a QEMU setting I need to apply? Reverting to v4.6.5 gets everything running again. My Windows 2000 and XP legacy machines still run under v4.7.1 (Beta), so I think it must be a 16-bit issue. See the uploaded screenshot issue for the Windows Me VM (yes, I know, Windows Me has a bad history, but I get the same results for Windows 95 and Windows 98 VMs).

debug.log

config.plist.txt

Configuration

• UTM Version: v4.7.1 (Beta)
• macOS Version: Sequoia 15.6
• Mac Chip (Intel, M1, ...): M1 Max

Crash log
None

Debug log
debug.log uploaded

Upload VM
config.plist uploaded

[osy]

@rshuston Can you test v4.7.0 beta? That will help narrow when it broke.

[rshuston]

@osy I just verified that the problem also exists in v4.7.0 beta. I also tried Windows 98 just to confirm that it affects my other Windows 9x VMs.

[osy]

Found the issue: https://gitlab.com/qemu-project/qemu/-/issues/2987
The fix: https://gitlab.com/qemu-project/qemu/-/commit/0f1d6606c28d0ae81a1b311972c5c54e5e867bf0

Will apply this for the next update

[rshuston]

@osy Yay! Thank you so much!

[rshuston]

@osy Just tried v4.7.2 (Beta) and my legacy Windows Me now works again. Thank you so much!