Int 11 Fn 7C - Rainbowfax V1.3 - Sfengine API - ??? [F] AH = 7Ch AL = subfunction 01h set ??? flag (see also subfn 02h) Return: AX = 0001h 02h clear ??? flag (see also subfn 01h) Return: AX = 0001h else Return: AX = FFFFh See Also: AH=77h,AH=78h,AH=79h,AH=7Ah