quoted

One thing: I'd be interested in figuring out what happens if you simply
leave this nasty ATI BAR unassigned (write 0xffffffff and then 0 to it).
Will the controller fail ?

Well, according to Matt Porter, 0 is a valid address in PCI 2.2. So how

do you

disable BARs for PCI 2.2-compliant devices?

And I'm afraid what XFree86 4.x will do with BARs set to 0. Probably it will
try to relocate them. I guess that's how it crashes on my box with an
unitialized S3...

Well, I may be wrong here, but the cause of our problem (the MMIO BAR
overlapping the framebuffer BAR causing XFree to bark) may also be an
XFree problem. I think we never completely figured out if what MacOS does
to the chip is valid or not (because of priority-decoding).

Ben.

** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/