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fix keyboard (T.Yui)

vect09:			sti
				push	ax
				push	ds
				xor		ax, ax
				mov		ds, ax
				in		al, 0x43
				test	al, 0x38
				jne		short .err
.force:			mov		al, 0x16
				out		0x43, al
				mov		byte [0x0529], 0
				in		al, 0x41
				mov		ah, al
				call	bios09
.eoi:			pop		ds
				cli
				mov		al, 0x20
				out		0x00, al
				cmp		ah, 0x60
				je		short .int5
				cmp		ah, 0x61
				je		short .int6
				pop		ax
				iret
.err:			cmp		byte [0x0529], 3
				jae		short .force
				inc		byte [0x0529]
				mov		al, 0x14
				out		0x43, al
				in		al, 0x41
				jmp		short .eoi

.int5:			pop		ax
				int		0x05
				iret

.int6:			pop		ax
				int		0x06
				iret