Oh... I hadn't seen your next message that dosbox is crashing.
On Sat, Nov 15, 2025 at 1:52 PM Vitaly Shevtsov <[email protected]> wrote: > > Hello, Ramiro. > > I don't know the reason. It looks like FreeDOS uses something that > other OSes don't use causing QEMU to crash. > But for me it happens only when FreeDOS is being installed. Once it's > installed I never face this issue. I'm pretty sure it's a bug in NVMM. > Maybe it's worth trying dosbox instead? > > On Thu, Nov 13, 2025 at 11:29 PM Ramiro Aceves <[email protected]> wrote: > > > > > > > > El 13/11/25 a las 19:19, Vitaly Shevtsov escribió: > > > Hello. I faced the same issue with qemu, nvmm and freedos. Tried to > > > debug with no luck. I found a workaround - run qemu with no > > > acceleration, install freedos, then run it with acceleration turned on. > > > This issue only happens when is it is being installed. > > > > > > чт, 13 нояб. 2025 г., 23:15 Ramiro Aceves <[email protected] > > > <mailto:[email protected]>>: > > > > > > > > > Hello, > > > > > > I tried to install FreeDOS under Qemu in NetBSD 10.1 using nvmm > > > acceleration driver. > > > > > > > > > I get an error like this when almost installed on the virtual disk: > > > > > > qemu-system-i386: NVMM: Unexpected VM exit code 0xffffffffffffffff > > > [hw=0x9] > > > qemu-system-i386: NVMM: Failed to execute a VCPU. > > > [1] Abort trap (core dumped) qemu-system-i386 -m 64 -accel nvmm - > > > smp 1 > > > -dri... > > > > > > > > > I removed nvmm acceleration and I was able to end the installation > > > without acceleration but it was painly slow. > > > > > > I have been able to virtualize a full Debian GNU/Linux system using > > > nvmm, no problems at all. Why nvmm fails with FreeDOS? > > > > > > Thanks so much. > > > Ramiro. > > > > > > > Hello Vitaly, > > > > I have started the virtual FreeDOS with nvmm, it starts fast and well. > > > > > > c:\dir (file listing works fine) > > > > But when I start an editor: > > > > > > c:\EDIT > > > > qemu-system-i386: NVMM: Failed to execute a VCPU. > > [1] Abort trap (core dumped) qemu-system-i386 -m 64 -accel nvmm -smp 1 > > -dri... > > netbsd-nuc$ > > > > > > Regards. > > Ramiro. > > > > > > > > > > > >
