[OpenBIOS] Faulty Qemu SPARC64 IDE emulation?

Tarl Neustaedter Tarl.Neustaedter at Sun.COM
Tue Dec 22 21:14:13 CET 2009

> QEMU is emulating a Sabre/Simba based system.

I'll keep that in mind - I never actually worked on one of those systems.

> There the values are (from the US-IIi manual)
> Config: 000001fe.01000000, length 00800000?
> IO: 000001fe.02000000 length 00100000
> mem32: 000001ff.00000000 length f0000000 (4G - PROM)
> mem64: 000001ff.80000000 length f0000000 (I think)

The ranges property you showed below comes out with:


Config space is twice the size of Psycho's, at 01000000 - so supports 
256 buses instead of the 128 psycho did (defect in that chip). IO space 
supports a full 24-bit address as well (length 01000000). And the memory 
spaces support the full 32 bits (length 1.00000000), although in 
practice you have to reserve some address space for DMA.

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