Re: Getting UniPCemu up and running

Posted on 2022-04-10, 13:01

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by mr.cat

in PC Emulation

in PC Emulation

FWIW the P2/i440fx/patched Bochs combination seems ok with the latest commits. SeaBIOS has trouble detecting the drives though (the boot menu is empty), that's starting with (UniPCemu) commit 52008e43 it looks like. Tried it with multiple SeaBIOS versions too (with 0.3.0 being the oldest one) and …

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Re: Getting UniPCemu up and running

Posted on 2022-04-04, 16:17

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by mr.cat

in PC Emulation

in PC Emulation

OK here's how to make SeaBIOS to execute the VGA optrom, so that we actually get to see something on VGA. I noticed that in the old SeaBIOS versions there's this switch called CONFIG_OPTIONROMS_DEPLOYED, that's needed to run optroms in old qemu versions (and Bochs). The switch was removed in commit …

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Re: Testing and fixing UniPCemu's CPU and UniPCemu progress

Posted on 2022-03-25, 15:24

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by mr.cat

in PC Emulation

in PC Emulation

Man do you work fast :D For me it's the opposite now (with commit 35833c02, i430fx/i440fx, patched Bochs BIOS, clockingmode=1 and cpuspeed=1700): CDROM boot is fine, but for hdd the boot fails with "FATAL: No bootable device.". I've encountered this issue in my previous testing with clockingmode=1 …

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Re: Testing and fixing UniPCemu's CPU and UniPCemu progress

Posted on 2022-03-24, 17:34

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by mr.cat

in PC Emulation

in PC Emulation

Yeah these latest changes have broken booting for me (cdrom0 or hdd0, with Bochs BIOS). I went back to commit a3371a63 and that one seems to work, but some minor patching is needed for Linux: libserial.h: "termios backup" should be "struct termios backup" maybe? libserial.c: some #ifdef trouble, as …

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Re: Testing and fixing UniPCemu's CPU and UniPCemu progress

Posted on 2022-03-02, 23:32

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by mr.cat

in PC Emulation

in PC Emulation

Have you tried the so called "checked" (debug) builds? They're supposed to have some internal testing so maybe worth a try. Also, is there a /debug switch for boot.ini in NT4?

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Re: Testing and fixing UniPCemu's CPU and UniPCemu progress

Posted on 2022-02-28, 00:37

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by mr.cat

in PC Emulation

in PC Emulation

That hex string seems to match halmps.dll (along with a couple of other dlls) and more specifically the function KfAcquireSpinLock(). So yes, that does point to APIC as you suspected. Some info here: https://geoffchappell.com/studies/windows/km/hal/history/index.htm?tx=14 It seems "mp" in halmps.dll …

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Re: Getting UniPCemu up and running

Posted on 2022-01-23, 19:49

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by mr.cat

in PC Emulation

in PC Emulation

Something I came across on Hacker News... Here's a Linux image with a modern kernel that actually manages to boot: https://ocawesome101.github.io/486-linux.html Didn't have much luck getting Linux going in UniPCemu until I came across this one.

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Re: Testing and fixing UniPCemu's CPU and UniPCemu progress

Posted on 2022-01-17, 22:18

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by mr.cat

in PC Emulation

in PC Emulation

Nice going, I won't be requiring a quadcore guest anytime soon though :D About that Kolibri DOSBox test, it's not broken because it does run in qemu (and at least "dir" works there). But I couldn't get Kolibri itself to run in UniPCemu (it hangs when detecting the CPU?) EDIT: The Kolibri hang seems …

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Re: Making WineD3D on Windows for Win32

Posted on 2022-01-17, 21:44

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by mr.cat

in PC Emulation

in PC Emulation

How to apply the mentioned patch on first post? Well it says to use git, so wouldn't that be just something like "git apply /path/to/patch.txt"? (yes can be done with a text editor too, but that gets old real quick...) Btw Bruno, I got your pm about WineD3D a bit late and then couldn't even reply …

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Re: x86 local apic and/or io apic issues?

Posted on 2022-01-15, 10:22

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by mr.cat

in PC Emulation

in PC Emulation

Well well, so jessie is recent enough to have systemd... The kernel got as far as trying to launch the first userland process (init, PID 1). And systemd init then launches a whole bunch of daemons that are listed in your pic 1531. In your first pic there's that __do_page_fault call in the trace (and …

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Re: x86 local apic and io apic diagnostics?

Posted on 2022-01-11, 23:41

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by mr.cat

in PC Emulation

in PC Emulation

Idk if it helps much but you could try using the kernel parameter "apic=debug", it should yield some more information. There's lot more of them listed in Documentation/kernel-parameters.txt. How do I pass that to the kernel when booting the installation cd-rom? I'm using the debian jessie i386-cd-1 …

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Re: x86 local apic and io apic diagnostics?

Posted on 2022-01-11, 19:47

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by mr.cat

in PC Emulation

in PC Emulation

Idk if it helps much but you could try using the kernel parameter "apic=debug", it should yield some more information. There's lot more of them listed in Documentation/kernel-parameters.txt.

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Re: Testing and fixing UniPCemu's CPU and UniPCemu progress

Posted on 2021-11-22, 06:04

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by mr.cat

in PC Emulation

in PC Emulation

With Minix 3.3.0, running setup from the bash shell causes it to hang still? Directory listing (ls) works though. The echo program also works. The boot was moving at a glacial speed for me, so I never got as far as having a shell. There could be some differences between the Minix3 versions. Besides …

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Re: Testing and fixing UniPCemu's CPU and UniPCemu progress

Posted on 2021-11-19, 21:31

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by mr.cat

in PC Emulation

in PC Emulation

I followed the breadcrumbs and found the cause for the Minix3 boot panic :D Looks like the problem is with TLB handling, so maybe this explains some Windows issues too? In my previous post , I found the main suspect on the Minix side to be reload_cr3(). Now taking a look at UniPCemu's source, we see …

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Re: Any good MS-DOS/Windows 9x(up to 98FE)/NT 3.1 80386-Pentium (/Pro/II)(no FPU) games for testing IA-32 emulation?

Posted on 2021-10-03, 22:40

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by mr.cat

in PC Emulation

in PC Emulation

Hmmm... My Minix 3.3.0's compiled CD-ROM has different results with the latest bugfixes commits of UniPCemu: vm(8): panic: vm: boot process load of process rs (ep=2) failed Then it follows with a stack trace etc. Interesting! I'm not sure if this is related to the issue you just mentioned, but it …

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Re: SeaBIOS booting progress on 86Box!

Posted on 2021-09-19, 10:21

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by mr.cat

in PC Emulation

in PC Emulation

I don't see much sense in trying to approximate the "look and feel" of the old BIOSes, but that's also a possibility. Whaddaya mean you don't want lurid green and purple menus? lol I actually think that from a purely aesthetic pov it could be great (consider the talent in the demoscene!), it's just …

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Re: SeaBIOS booting progress on 86Box!

Posted on 2021-09-18, 13:55

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by mr.cat

in PC Emulation

in PC Emulation

I might be wrong but SeaBIOS doesn't seem very DOS/Win9x oriented. The original BIOSes *should* be a safe bet in terms of compatibility I wouldn't be surprised if I heard that the SeaBIOS developers aren't all that interested in DOS/Win9x, but I can't recall too many problems with Qemu + SeaBIOS …

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Re: Updating Award Bios (error the file size does not match!)

Posted on 2021-09-10, 18:55

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by mr.cat

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

^ What he said :D It would probably work just the same. The contents of the first 128kB shouldn't really matter as long as it's exactly 128kB (131072 bytes). The actual BIOS payload must come last. (And if you're unsure about the resulting file, you can give it a spin in an emulator as I did.) EDIT: …

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Re: SeaBIOS booting progress on 86Box!

Posted on 2021-09-10, 18:51

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by mr.cat

in PC Emulation

in PC Emulation

Thank you, nice to have something a bit more concrete than just my guesstimates about it :D For emulators, there are a couple of other considerations: I might be wrong but SeaBIOS doesn't seem very DOS/Win9x oriented. The original BIOSes *should* be a safe bet in terms of compatibility The original …

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Re: How to fix 0D0C POST code error on ASUS P2B

Posted on 2021-09-08, 17:05

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by mr.cat

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks for reporting! So is that just missing microcodes in the old BIOS version or something else?

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