INT D4 - PC-MOS/386 v5.01 - SET/CLEAR IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. RESERVATION
	AH = 16h
	AL = function (00h clear, 01h set reservation)
	CX = IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. number
Return: AX = status
	    (0000h successful, 0001h currently reserved by another task)
SeeAlso: AH=07h,INT 14/AH=11h"PC-MOS"