Etched in copper on top board SOUND BOARD Etched in copper on bottom board CPU BOARD Board stamped K9620G YAMASHITA Graphics dump showed spaceship looking things .82 TMS27L08 stickered GC6 .81 TMS27L08 stickered GC5 .80 TMS27L08 stickered GC4 .77 TMS27L08 stickered GC3 .76 TMS27L08 stickered GC2 .75 TMS27L08 stickered GC1 .49 M3-7643M stickered CV01 .50 M3-7643M stickered CV02 .49 and .50 had the same checksums .22 MMI PAL10L8CJ stamped P couldn't read "Security fuse violation" INS8080A P8255 x2 M8228PC P8212 10MHz crystal by 8255 furthest away from 8080 18Mhz crystal by 8080 WinROMIdent v1.05 =========================== GC.81:[246621EF] Not Found! ============================ GC.82:[19BD32EE] Not Found! ============================ gc.49:[8D892EF3] Not Found! ============================ gc.50:[B44DDDE8] Not Found! ============================ GC.75:[AD10C128] Not Found! ============================ GC.76:[3638AED4] Not Found! ============================ GC.77:[AB77C474] Not Found! ============================ GC.80:[4C67957B] Not Found!