INT 2F - Kingswood TSR Windows - SCROLL WINDOW
AX = 3901h
BL = 09h
CL = scroll direction: 00h up, FFh down, 00h clear window
Return: AX = error code (0000h if successful)
SeeAlso: AX=3901h/BL=07h

See also: 2F39

2F3901BL09 - Kingswood TSR Windows - SCROLL WINDOW