X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - int 16 - keyboard

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INT 16 - KEYBOARD - GET SHIFT STATUS
        AH = 02h
        AL = shift status bits
            0 = right shift key depressed
            1 = left shift key depressed
            2 = CTRL depressed
            3 = ALT depressed
            4 = SCROLL LOCK active
            5 = NUM LOCK active
            6 = CAPS LOCK active
            7 = INSERT state active
SeeAlso: AH=12h

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