A20 Line: Difference between revisions
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→Testing the A20 line: Maybe the code in this function is a bit excessive, but I wanted it to be self-contained. |
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; Purpose: to check the status of the a20 line in a completely self-contained state-preserving way.
; The function can be modified as necessary
; respective pop's at the end if complete self-containment is not required.
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; Returns: 0 in ax if the a20 line is disabled (memory wraps around)
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