2015-4-28 Firmware v2.61
1:Modify key mapping for the RETRON5 console(START + L mode):
	Y = +
	B = -
	X = <
	A = v
	L = L
	R = R
Other key is unchanged.

2015-04-01 Firmware v2.60
1: Added the START + L mode (support RETRON5 console).
Note: L + R + A + B as the Home key of the RETRON5 console.

2014-12-22 Firmware v2.52
1.Modified Mode 2 (START+B+R) secondly key code. D-Pad change from arrow key to normally letter, in order work with emulator better.
2.Added PC Joystick mode(power up START+R and connect to PC). D-Pad works as Joystick D-Pad, not a keyboard arrow key.