X-Hacker.org- Interrupts & Ports

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        Share - Installation check
        Entry:
          AX = 1000h
        Return:
          AL = 00h  not installed, OK to install
          01h  not installed, not OK to install
          FFh  installed

        Note: values of AL other than 00h appear to put DOS 3.3 SHARE
              into an infinite loop

See Also: INT 21h, 52h

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