Int D4 Fn 16 - PC-mos/386 V5.01 - Set/clear IRQ Reservation [O] AH = 16h AL = function (00h clear, 01h set reservation) CX = IRQ number Return: AX = status (0000h successful, 0001h currently reserved by another task) See Also: AH=07h,INT 14/AH=11h"PC-MOS"