Category: video
INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (PS) - DISPLAY-SWITCH INTERFACE AH = 12h BL = 35h AL = subfunction 00h initial adapter video off 01h initial planar video on 02h switch active video off 03h switch inactive video on 80h *UNDOCUMENTED* set system board video active flag ES:DX -> buffer for 128 byte save area (if AL = 00h-03h) Return: AL = 12h if function supported Desc: switch between two video adapters which may otherwise have address conflicts SeeAlso: AX=BF00h,AX=BF01h,INT 6D"VGA"