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while the original is mahjong pinout and require matrix inputs. It has no EEPROM but 2 banks of dipswitch The bootleg has some gfx glitches (flickering ... ...

2x 15 legs connector (coin mech, switch matrix) 3x 10 legs connector (meters, reel index, triacs) 1x 11 legs connector (spare stepper motors) ... ...

- inputs are matrix type but they are used in a way that you can wire all rows pins together and connect to GND. ----- update 20220213: thanks ... ...