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Int 31H Function 0901H

Get and Enable Virtual Interrupt State [0.9]

Enables the virtual interrupt flag and returns the previous state of the virtual interrupt flag.

Call With

AX = 0901H


Virtual interrupts enabled
Carry flag = clear (this function always succeeds)
AL = 0 if virtual interrupts were previously disabled
AL = 1 if virtual interrupts were previously enabled


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  Copyright 1996   by DJ Delorie     Updated Apr 1996