> I'm 98% sure the problems are due to not banking the BIOS correctly for that > motherboard/chipset.
It's not a banking problem. The behavior looks identical to the issue with Savage Quest, which was definitely an incomplete BIOS. However, in this case, it's that the BIOS is moving a block of memory out of the way for a while, and then not putting it back before attempting to call it. I suppose that one of the ports is not returning the expected value. > That is not my area of expertise, however > > ETA: Carl, whose area this definitely is, says 0f 3c is a MediaGX-specific opcode.
The other two are 0f 78 and 0f 79.
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