X-Hacker.org- Interrupts & Ports - read char from buffer

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        Read char from buffer - don't wait

        Entry:
          AH = 01h
        Return:
          ZF = 0 character in buffer
            AH = scan code
            AL = character
          ZF = 1 no character in buffer

See Also: INT 16h, 00h INT 16h, 02h

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