Int 2F Fn 3901 - Kingswood Tsr Windows - Scroll Window [r] AX = 3901h BL = 09h CL = scroll direction: 01h up, FFh down, 00h clear window Return: AX = error code (0000h if successful) SI,DI,DS,ES preserved See Also: AH=39h/BL=00h,AX=3901h/BL=07h