EnableIRQs:	mov al, 0x11	; icw4, edge triggered		out MASTER_PIC, al		jmp short $+2		out SLAVE_PIC, al		jmp short $+2		mov al,0x20	; generate 0x20+		out IRQ_LO_PORT, al		jmp short $+2		mov al,0x28	; generate 0x28+		out IRQ_HI_PORT, al		jmp short $+2		mov al, 0x04	; slave at irq2		out IRQ_LO_PORT, al		jmp short $+2		mov al, 0x02	; at irq9		out IRQ_HI_PORT, al		jmp short $+2		mov al,0x01	; 8086 mode		out IRQ_LO_PORT,al		jmp short $+2		out IRQ_HI_PORT,al		jmp short $+2		mov al,0xFF	; mask all IRQs		out IRQ_LO_PORT,al		jmp short $+2		out IRQ_HI_PORT,al		jmp short $+2;;;;		xor al, al	; unmask all IRQs		out IRQ_HI_PORT, al		jmp short $+2		out IRQ_LO_PORT, al		jmp short $+2		mov ecx,32EnableIRQs0:	mov al, END_OF_INTERR	; ready for IRQs		out MASTER_PIC, al		jmp short $+2		out MASTER_PIC, al		out SLAVE_PIC, al		loop EnableIRQs0	; flush the queueEnableIRQs1:	in al, KBD_PORT_C	; flush keyboard buffer		test al, 0x01		jz EnableIRQs2		in al, KBD_PORT_A		jmp short EnableIRQs1EnableIRQs2:	test al, 0x02		jnz EnableIRQs1		in al, KBD_PORT_B	; enable keyboard		mov ah, al		or al, 0x80		out KBD_PORT_B, al		jmp short $+2		mov al, ah		out KBD_PORT_B, al		jmp short $+2		sti		ret;----------------------------------------------------------------PrepareIRQs:	mov al, 0xFF	; mask all IRQs		out IRQ_HI_PORT, al		out IRQ_LO_PORT, al		in al, 0x70	; disable NMI		or al, 0x80		out 0x70, al		retA20En:		in al, 0x92	; enable A20		or al, 2		out 0x92, al		ret;----------------------------------------------------------------RestoreRmodeIRQs:		mov al, 0xFF	; mask all IRQs		out IRQ_HI_PORT, al		out IRQ_LO_PORT, al		mov al, 0x11	; icw4, edge triggered		out MASTER_PIC, al		jmp short $+2		out SLAVE_PIC, al		jmp short $+2		mov al, 8	; generate 8+		out IRQ_LO_PORT, al		jmp short $+2		mov al, 0x10	; generate 0x10+		out IRQ_HI_PORT, al		jmp short $+2		mov al, 0x04	; slave at irq2		out IRQ_LO_PORT, al		jmp short $+2		mov al, 0x02	; at irq9		out IRQ_HI_PORT, al		jmp short $+2		mov al, 0x01	; 8086 mode		out IRQ_LO_PORT, al		jmp short $+2		out IRQ_HI_PORT, al		jmp short $+2		mov al, 0xFF	; mask all IRQs		out IRQ_LO_PORT, al		jmp short $+2		out IRQ_HI_PORT, al		jmp short $+2		xor al, al	; unmask all IRQs		out IRQ_HI_PORT, al		jmp short $+2		out IRQ_LO_PORT, al		jmp short $+2		mov ecx, 32RestoreRmodeIRQs0:		mov al, END_OF_INTERR	; ready for IRQs		out MASTER_PIC, al		jmp short $+2		out MASTER_PIC, al		out SLAVE_PIC, al		loop RestoreRmodeIRQs0	; flush the queue		ret