On Sun, 7 Aug 2022, Mark Cave-Ayland wrote:
On 07/08/2022 12:47, Elliot Nunn wrote:
I want to give Mac OS 9 clients access to hardware cursor support, to
improve
responsiveness in absolute-cursor mode.
Would it be acceptable to add a hardware cursor interface to the VGA
device?
And if so, can anyone advise on an appropriate register layout?
This is an example of such a patch. Because it alters the Bochs VBE
interface
it is ONLY an example, NOT fit for acceptance. I have omitted the changes
to
the binary driver qemu_vga.ndrv.
Kind regards,
Elliot Nunn
Nice work! Have you been in contact with the Bochs developers to see what
their thoughts are to your proposed changes? Generally QEMU prefers to
implement documented specifications, so this would be the best route to
go.
Thanks! I don't think it would be appropriate to update the Bochs standard
with a feature that they don't use. And on reflection, perhaps the
compatibility-oriented VGA device is big enough already.
Sure, no worries.
My plan is to write a Mac OS 9/X "ndrv" targeting virtio-gpu. All going
this well, this might become the default mac99 GPU until ati-vga is ready.
That sounds really interesting. Is there a forum/mailing list somewhere where
it is possible to follow the Mac side of your work? I can certainly advise on
the qemu-system-ppc side.
But virtio-gpu is not compiled into qemu-system-ppc by default. What is the
difference between CONFIG_VIRTIO_(GPU|PCI|VGA)? And is
configs/devices/ppc-softmmu/default.mak the correct place to declare them?
You probably want to add a "select VIRTIO_GPU_PCI" and/or "select
VIRTIO_GPU_VGA" in the "config MAC_NEWWORLD" section of hw/ppc/Kconfig to
enable the virtio devices for the mac99 machine.
Not sure how this works but pc and pseries machines seem to have imply
VIRTIO_VGA so probably that's what you need to add to config MAC_NEWWORLD
or just try qemu-system-ppc64 -machine mac99,via=pmu -cpu G4 which should
already have it due so pseries but may otherwise be equivalent to the one
in qemu-system-ppc.
Regards,
BALATON Zoltan
