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

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INT 16 - pcANYWHERE - COMMUNICATIONS I/O THROUGH PORT
        AH = 7Eh
        AL = subfunction
            01h port input status
                Return AX = 0 if no characer ready,
                       AX = 1 if character ready
            02h port input character
                Return AL = received character
            03h port output character in CX
            11h hang up phone

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