X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - int 17 - printer

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INT 17 - PRINTER - OUTPUT CHARACTER
        AH = 00h
        AL = character
        DX = printer port (0-3)
Return: AH = status bits
            bit 0 time out
                1 unused
                2 unused
                3 I/O error
                4 selected
                5 out of paper
                6 acknowledge
                7 not busy

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