Re: [Qemu-devel] [OpenBIOS] [Qemu-ppc] CUDA has problems with Mac OS 10.4

[Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>]

On 20/11/15 22:40, BALATON Zoltan wrote:

> On Fri, 20 Nov 2015, Alfonso Gamboa wrote:
>> booting into MacOS9 with qemu to the Desktop is now possible, see:
>>
>> http://www.emaculation.com/forum/viewtopic.php?f=34&t=7047&start=250
> 
> Very nice.
> 
>> On Nov 20, 2015 7:46 AM, "Programmingkid" <programmingkidx@gmail.com>
>> wrote:
>>> I use to have the same belief until Mark set me straight. We are only
>>> making an emulator of a new world Mac, not a simulator of a PowerMac3,1.
>>> This means we might be able to get away with not exactly mirroring a
>>> real
>>> Mac. The fact that Mac OS 9 can boot up at all does give me hope we
>>> are on
>>> the right path.
> 
> I'm clear on that but what I've meant was that we probably have to make
> a closer emulation of the real PowerMac (not one to one but close
> enough) to make OSes written for that hardware happy. I think we are
> missing some i2c and gpio emulation that these OSes might expect but I'm
> not sure.
> 
> One thing that might help to hint at what's missing is to compile QEMU
> with DEBUG_UNASSIGNED (this will generate a lot of logs) and try to find
> out what is accessed that is not emulated.

Just to clarify here that this doesn't mean that I'm unwilling to accept
patches that move the device model more towards a real Mac, only that
any such patches must provide replacements for any new peripherals
introduced so that during the transition there is no loss of functionality.


ATB,

Mark.