Re: [Qemu-ppc] MorphOS 4.x on QEMU

[BALATON Zoltan]

On Tue, 25 Feb 2014, BALATON Zoltan wrote:
> On Tue, 25 Feb 2014, BALATON Zoltan wrote:
> > overwrites part of the exception_return code of openbios so the next time 
> > it gets a DSI exception and is trying to run this code it leads to an 
> > invalid opcode exception and that's it.
>
> Actually if I restore the overwritten word in memory it runs further until it 
> prints "console failed".

Hmm... Does anyone actually reads this list or am I talking to myself here?

Debugging it further shows that despite not finding a compatible Radeon 
graphics adapter it continues further and only stops after trying to 
identify/initialise the CPU.  I still have no fix for the zeroing the 0x80 
address causes an exception problem.

Is is possible to use pci passthrough to make a graphics card available to 
the guest? Was it tested recently on ppc? Is there any documentation on 
how to do it? In case I can find a compatible card I might try to see if 
that would work.

Also I've found that the MorphOS kernel looks for a device within /pci 
with a class-code == 0x0780 (other communication device) for a serial port 
where it may display some debug info. Unfortunately there is no such 
device on QEMU. Is there an easy way to add one? Can someone verify if 
this is present on Mac hardware or does it expect some third party serial 
card for debugging? Having some debug printout might help debugging this 
further.

Any ideas anyone?

Regards,
BALATON Zoltan