Re: [Qemu-devel] [Qemu-ppc] [PATCH RFC 0/4] Mac OS 9 compatibility improvements

[Stewart Smith]

Mark Cave-Ayland <address@hidden> writes:
> I can confirm here that in combination with an updated OpenBIOS then the
> patchset gets qemu-system-ppc -M mac99 to the OS 9 loading screen, which
> is great progress!
>
> When booting OS 9 with this patchset I do see the following output on
> the console:
>
> Trying to write invalid spr 0 (0x000) at 00f113c0
> Trying to read invalid spr 0 (0x000) at 00f113c8
> Trying to write privileged spr 955 (0x3bb) at 00f164b8
> Trying to write invalid spr 959 (0x3bf) at 00f16520
> Trying to read invalid spr 959 (0x3bf) at 00f16528
> Trying to write privileged spr 955 (0x3bb) at 00f164b8
> Trying to write invalid spr 959 (0x3bf) at 00f16520
> Trying to read invalid spr 959 (0x3bf) at 00f16528

>From http://www.freescale.com/files/32bit/doc/data_sheet/MPC604.pdf it
looks like the 955 and 959 are SPRs for the Performance Monitor,
specifically SDA and SIA, Sampled Data/Instructian Address.

Some more info:
http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=528812
and probably around some processor manuals.