X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - int 21

Click above to get retro games delivered to your door ever month! X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - int 21 - ???

INT 21 - ???
        AH = 89h
        ???
Note:   reportedly called by Microsoft C 4.0 startup code

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