Int 13H Function 12H
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Description: Controller RAM Diagnostic [PC]
Causes the fixed disk adapter to carry out a built-in diagnostic test on
its internal sector buffer, indicating whether the test was passed by the
returned status.
Input Output
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AH=12H If function successful
Carry flag=clear
If function unsuccessful
Carry flag=set
AH=status (see Int 13H Function 01H)
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