[OpenBIOS] Faulty Qemu SPARC64 IDE emulation?

[Nick Couchman]

> 
> 
> That's interesting. From the whole output you posted in the pastebin, it 
> looks as if the IDE control register is located at 0x682 and various 
> bits of data are written between 0x600 and 0x607.
> 
> However, then something does terribly wrong mid-request and the write 
> addresses change to 0x500-0x507 with a control register at 0x582, then 
> 0x600-0x607 with a control register at 0x582 and then 0x700-0x707 with a 
>   control register of 0x682 again.
> 
> I'm current leaning towards this being a bug in Qemu...
> 
> 

So perhaps the 57 that it tries to write as an IDE CMD is getting pulled out of a memory location that the IDE code shouldn't be accessing?

-Nick




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