Oh, well.. That code provably makes the A20 handling work correctly at
least on one laptop, but I guess the "guaranteed to be unused" location
isn't.
>roll back the changes that patch-2.1.106 does in
>
> linux/arch/i386/boot/setup.S
> linux/arch/i386/kernel/head.S
>
>and you are done...
Before rolling back, can you tell me whether you can instead use some
other location, like 0? So the code in arch/i386/boot/setup.S would use
the constants "0" and "0x10" instead of using "0x7c00" and "0x7c10" to
verify that we have correctly switched the A20 line on..
Linus
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