"SEGA Interface" This is for Sega's "E-SWAT" game, from 1989. It is referred to in the book as the "Sega Interface", so I would assume that it's their own standard. Why they don't just use JAMMA, I'm not sure. This doesn't provide anything that JAMMA doesn't, and, in fact, is missing the tilt switch connection. Anyway, here it is: ----------------------------------------------------------- Component Side | Solder Side ----------------------------+------------------------------ GND 1 | A GND GND 2 | B GND +5V 3 | C +5V +5V 4 | D +5V +12V 5 | E +12V Coin Meter 1 6 | F Coin Meter 2 N/C 7 | H N/C Special Weapon 1 8 | J Special Weapon 2 Shoot 1 9 | K Shoot 1 Jump 1 10 | L Jump 1 N/C 11 | M N/C Down 1 12 | N Down 2 Up 1 13 | P Up 2 Right 1 14 | R Right 2 Left 1 15 | S Left 2 N/C 16 | T N/C N/C 17 | U N/C N/C 18 | V N/C N/C 19 | W N/C Coin 1 20 | X Start 1 Coin 2 21 | Y Start 2 Test 22 | Z N/C Service 23 | a N/C Speaker + 24 | b Speaker - Red 25 | c Green Blue 26 | d Composite Sync GND 27 | e GND GND 28 | f GND -----------------------------------------------------------