; IN:
; DX = port address
; AL = byte
port_byte_out:
	pusha
	out dx,al
	popa
	ret
; -----------------------------------------
; IN:
; DX = port address
; OUT:
; AL = byte from port
port_byte_in:
	in al, dx
	ret

port_serial_enable:
	ret
port_send_via_serial:
	ret
port_get_via_serial:
	ret