Also when it comes to enabling the IDE controller in compatibilty mode
(reg 0x42) the non working versions reports it contains 0xc9, the
working version reports the same register as 0.
You need to set the prog-if field in the PCI config space
for the controller to 0x8a, not 0x8f, before doing the BAR
allocation to get legacy mode. Did you do this?
Segher
I am not sure about the order of things, however according to the PCI
IDE controller document you pointed me to 0x8a is fine as bits 0 &
2 are don't care.