INT 16 - K3PLUS v6.00+ (API v2.00+) - SET OPTIONS AX = AF51h BX = 4B33h ('K3') CX = switches Return: AL = status 00h done CX = previous switch settings 01h switch not supported FFh other error SeeAlso: AX=AF4Dh,AX=AF50h,AX=AF80h