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				| 5770-09471-X4 | Note: This CPU board can only be used in UPRIGHT Defender games. 
 The two wires on this board are a factory fitted modification.   Images courtesy of www.robotron-2084.co.uk   | Defender Early Series | CPU | Arcadenut | 
				| 5771-09472 | Images courtesy of www.robotron-2084.co.uk | Defender Early Series | Sound | Arcadenut | 
				| 5771-09472 | Images courtesy of www.robotron-2084.co.uk   | Defender Early Series | ROM | Arcadenut | 
				| 5772-09473 | Images courtesy of www.robotron-2084.co.uk | Defender Early Series | IO | Arcadenut | 
				| 5770-09616 | Images courtesy of www.robotron-2084.co.uk   | Defender Later Series | CPU | Arcadenut | 
				| 5771-09615 | Images courtesy of www.robotron-2084.co.uk   | Defender Later Series | ROM | Arcadenut | 
				| 5772-09614 | Images courtesy of www.robotron-2084.co.uk | Defender Later Series | IO | Arcadenut | 
				| 1B-2001-146 | Images courtesy of www.robotron-2084.co.uk | Defender Later Series | Sound | Arcadenut |