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

[Mark Cave-Ayland]

On 09/03/14 13:05, BALATON Zoltan wrote:

> Hello,
>
> I was asked to avoid crossposting between the MorphOS list and other
> lists so for those who are not on that list but interested in this I
> send here a short status update.
>
> I'm currently at a point where I think I can almost get it to boot but I
> get a fatal exception right after the main kernel thread is started
> which may be related to some conflict/disagreement in memory management
> with the firmware implementation and the MorphOS boot loader.
>
> So far I identified these that prevent MorphOS running on QEMU:
>
> 1. Write to 0x80 at the beginning (can be corrected in openbios)
> 2. Bug in nextprop (fixed in openbios)
> 3. Differences in names and missing properties (fixed in openbios)
> 4. Overwriting exception vectors without disabling MMU first (can be
> corrected

What's the actual problem here? Is it that the exception vectors are 
being copied to an area of memory that is write-protected by the MMU?

> in MorphOS boot loader or maybe in openbios)
> 5. Failures during page table creation (don't know yet how to correct)
> 6. Exception after ABox is started (may be related to 5. or something else)

ATB,

Mark.