[OpenBIOS] Documentation on 0xcfe IO port?

[Ronald G. Minnich]

On Wed, 16 Feb 2000, Wallace I. Kroeker wrote:


> ; turn on the dram and wait a while (this from the intel book)
>         mov dx, 0xcf8
>         mov eax, 0x80000074
>         out dx, eax
>         mov dx, 0xcfe

Yeah, this is cute. Basically you put a word-aligned address in cf8. Then
to get to reg. 76 you do an out to 0xcfe, which offsets the 74 to 76. 

Look in the ALI chipset directory in openbios: they have a nice macro
there that shows how this works.

ron

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