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November 2025

3 participants
2 discussions

Re: PCI Passthrough of GPUs
by Jd Lyons Nov. 24, 2025

Nov. 24, 2025

Removing the NVDAResman.kext will get us to the desktop, even tho the bad range is reported for the BARs above 0x9xxxxxxx is’t happy to use them Nov 14 12:13:24 kextd[28]: 0 cached, 218 uncached personalities to catalog ndrv base = 4276e000 ndrv base = 41a6a000 Nov 14 12:13:25 localhost DirectoryService[48]: Launched version 2.1 (v353.6) Nov 14 12:13:25 localhost mDNSResponder-108.6 (Jul 19 2007 11: 33:32)[38]: starting UniNEnet: Ethernet address 52:54:00:12:34:56 Nov 14 12:13:26 localhost /System/Library/CoreServices/loginwindow.app/Contents/MacOS/loginwindow: Login Window Application Started Attached protocol 30 to en0 - 0 UniNEnet::monitorLinkStatus - Link is up at 100 Mbps - Full Duplex Attached protocol 2 to en0 - 0 NVDA,Display-A: vram [90020000:08000000] NVDA,Display-B: vram [92000000:08000000] initialize_screen: b=4391B000, w=00000F00, h=00000870, r=00004000 initialize_screen: b=4391B000, w=00000F00, h=00000870, r=00004000 kPEEnableScreen -1 in.c: warning can't plumb proto if=en0 type 6 error=17 > On Nov 14, 2025, at 10:14 AM, Jd Lyons <lyons_dj(a)yahoo.com> wrote: > > > >> On Nov 14, 2025, at 10:07 AM, BALATON Zoltan <balaton(a)eik.bme.hu> wrote: >> >> On Fri, 14 Nov 2025, Jd Lyons via OpenBIOS wrote: >>> I finally got this working with a GF7800GT and it boots linux on G4/G5 on mac99 OpenGL seems to work. >>> >>> Having an issue with mac99 only having a 256MB PCI hole window and we need more than that for 256+ MB VRAM cards. I patched it in openbios, but the uninorth.c in qemu says 256MB is the real PCI memory hole on mac99?? >> >> I was told here: >> https://www.amigans.net/modules/newbb/viewtopic.php?post_id=141184#forumpos… >> that this may be normal for old machines. Maybe you need to disable resizable BARs in your BIOS/UEFI setup of the host? > > > I did disable resizable bars some time back. >> >>> I patched it to 1GB but OS X still has issues with it and kernel panics when the graphics come up to the desktop. >> >> This may not work as that could overlap other I/O areas. I think the driver should be able to handle the 256MB BAR limitation as that seems to be normal for these cards. >> > > These cards have 64bit BARs it moves it outside the 265MB range with 265MB of VRAM alone. No? > > > >> Regards, >> BALATON Zoltan

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PCI Passthrough of GPUs
by Jd Lyons Nov. 15, 2025

Nov. 15, 2025

I finally got this working with a GF7800GT and it boots linux on G4/G5 on mac99 OpenGL seems to work. Having an issue with mac99 only having a 256MB PCI hole window and we need more than that for 256+ MB VRAM cards. I patched it in openbios, but the uninorth.c in qemu says 256MB is the real PCI memory hole on mac99?? I patched it to 1GB but OS X still has issues with it and kernel panics when the graphics come up to the desktop. I see this error but it can't be correct because people have been using 512MB AGP cards in real PowerMac3,1! AppleMacRiscPCI: bad range 2(90000000:10000000) AppleMacRiscPCI: bad range 2(a0000000:01000000) Patches to come if any interest?

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