grub-core/tests/boot/qemu-shutdown-x86.S


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	movl $0x80000b80, %eax
	movw $0xcf8, %dx
	outl  %eax, %dx
	movw $0xcfc, %dx
	inb  %dx, %al
	orb  $1, %al
	outb  %al, %dx

	movl $0x80000b40, %eax
	movw $0xcf8, %dx
	outl  %eax, %dx
	movl $0x7001, %eax
	movw $0xcfc, %dx
	outl  %eax, %dx
	movw $0x2000, %ax
	movw $0x7004, %dx	
	outw  %ax, %dx