CB>         Is this code grabing data directly from the ROM chip
 CB>  or is it just data from ROM that has been read into RAM ?
Not 100% sure, I think it is ROM read into RAM.
Maybe it is BIOS dependent?
 CB>  If data between $000F0000 and $000FFFFF were altered would
 CB>  it remain different on the next boot ?
No, of course not. It says "ROM", doesn't it? That mean that
you cannot alter it as normal memory. If it can be modified,
the modifications are temporary.
[peter]
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