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

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INT 21 - DOS 2+ - GET EXIT CODE OF SUBPROGRAM (WAIT)
        AH = 4Dh
Return: AL = exit code of subprogram (from AH=31h or AH=4Ch)
        AH = circumstance which caused termination
            00h Terminate/abort
            01h Control-C/Control-Break
            02h Hard error
            03h Terminate and stay resident
SeeAlso: AH=4Bh,AH=4Ch

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