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

[BALATON Zoltan]

On Wed, 26 Feb 2014, BALATON Zoltan wrote:
> 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

Just to document it somewhere: it seems that more exactly it looks for a 
pci device with a class-code of either 0x078000 or 0x070002 to use as a 
16550 compatible serial port for debugging. The easiest seems to be using 
QEMU's serial-pci device with a patch to add the missing Prog I/F code and 
a patch to openbios to add it to the class-code property. Patches are sent 
to the appropriate lists, but the openbios list seems to be dead (or 
moderation is dead slow)... With these patches the MorphOS boot loader 
detects the serial port but haven't seen any output on it yet, maybe 
because it dies shortly after this during CPU init but I don't know yet 
why.

Regards,
BALATON Zoltan