HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

           INT 21,64 - Set Device Driver Look Ahead  (Undocumented)

       AH = 64h
       AL = value for switch
            00   causes DOS to perform look ahead to the device driver
                 before execution of INT 21,1, INT 21,8 and INT 21,A
            other - no look ahead is performed

       returns ???

       - DOS internal; should not be called by user program
       - switch defaults to zero
       - undocumented; since DOS 3.3
       - some other subfunctions are know to have existed since DOS 3.2 but
         details on their functionality are incomplete

Esc or Alt-X to exit int 21,64 Home/PgUp/PgDn/End ←↑↓→
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