[LinuxBIOS] status update - K8T890/VT8237

Rudolf Marek r.marek at assembler.cz
Fri Jul 13 10:12:32 CEST 2007

Rudolf Marek wrote:
>>> BUT! The VGA ROM seems to be mapped to C8000! How is this possible? Why is 
>>> linuxbios claiming that the RAM is from C0000-EFFFF???
>> Weird. It should be mapped to C0000 and that is usually hardcoded. What
>> card is that? External? Is there onboard VGA?
> Sorry for the noise. It maps to c0000, but anyway, why is LinuxBIOS claiming 
> that RAM starts at c0000?
> Who/what is responsible for mapping the ROM c0000?

Ok I found it. LinuxBiOS will just copy the ROM to this part of RAM. When I do 
memtest86+ on this area, all test will pass. However If I try to write to this 
region (C0000-EFFFF) in Linux - it is readonly??? Any clue?


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