Amended assembler

switch_on:
	/* Send the command to the EC to turn the keyboard backlight on */
	movw	$0x66, %dx
1:
	inb	%dx, %al                /* Wait for IBF == 0 */
	andb	$0x02, %al
	jnz	1b

	movb	$0x81, %al              /* Send EC write command */
	outb	%al, %dx

2:
	inb	%dx, %al                /* Wait for IBF == 0 */
	andb	$0x02, %al
	jnz	2b

	movb	$0x19, %al              /* Register 0x19 */
	movw	$0x62, %dx
	outb	%al, %dx

	movw	$0x66, %dx
3:
	inb	%dx, %al                /* Wait for IBF == 0 */
	andb	$0x02, %al
	jnz	3b

	movb	$0xee, %al              /* Value 0xee */
	movw	$0x62, %dx
	outb	%al, %dx

	/* Delay for a while */
	movl	$0x00010000, %ecx
wait1:
	nop
	loop	wait1