INT 2F - 4DOS v4.0+ - KSTACK.COM - PLACE KEYSTROKES INTO KEYSTACK
        AX = D44Fh
        BX = 0001h
        CX = number of keystrokes (01h-FFh)
        DS:DX -> keystroke list (one word per keystroke)
Return: AX = status
            0000h successful
            nonzero failed
        BX,CX,DX destroyed
Notes:  the keystrokes are the exact values to return from subsequent calls to
          INT 16 with AH=00h,01h,10h, or 11h, with the following exceptions:
                0000h causes subfunctions 01h and 11h to indicate an empty
                        keyboard buffer
                FFFFh is followed by a word indicating the number of clock
                        ticks to delay before the next faked keystroke
        v4.00 KSTACK overwrites any unread keystrokes from the previous
          invocation, and does not range-check CX; it will overwrite memory
          following the resident portion if CX is greater than 100h.
SeeAlso: INT 16/AH=00h,INT 21/AX=4403h