Hello,

> Getting vgahw to work would allow quite a lot of graphics boards to 
> work...

Some progress - the got around the dreaded "can't map video memory 
[a0000,10000]", although I don't have the faintest idea what went wrong 
or why it works now.
XFree opens /dev/mem at some point and maps things like video ram, 
registers and so on, and for some boards also the VGA framebuffer 
memory - hardwired at 0xa0000. For this - and only this - address mmap 
fails with 'invalid argument'. So after some frustration I just opened 
/dev/mem myself and mmap()ed this memory range and - surprise! It 
works. So - what the hell happened? It's no limit on how many mappings 
of the same file you can have - I modified the code to map the VGA 
memory before all others - it fails even then.
And this problem seems to be PowerPC specific. Hmm, maybe it uses some 
voodoo on the file descriptor or so, I'll have a look.

have fun
Michael