Project - hardware to run AOS4 for 35 euro on QEMU 10 + GPU passthrough

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balaton

Re: Project - hardware to run AOS4 for 35 euro on QEMU 10 + GPU passthrough

Posted on: Yesterday 21:56 #141

Quite a regular

@smarkusg
Quote:

After completely removing AC97 from the QEMU source and using PCI passthrough with Sound Blaster Audigy FX, everything works fine.
There is also a noticeable reduction in latency, similar to that seen when using PCI passthrough with a GPU.
If you have ever used FPGA vs SOFT emulation, the experience is similar.

OK so you see some improvement but there are still some questions. Is it really necessary to patch out via-ac97 from QEMU or is it enough to just use a passed through card instead without any patches to QEMU? Have you tested that? Also it may be because of different drivers and not emulation vs. real card so have you tested -device ES1370 instead that uses another driver in AmigaOS? That driver that ES1370 uses can also be tested against a real SB128 so that way it could be found if the problems you saw are related to via-ac97 or emulation. You should see no latency on AmigaOS when sound is not playing even with via-ac97 but it may have some effect when sound is playing.

https://qmiga.codeberg.page/

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