National MSX CF-3000 Keyboard Data National MSX CF-3000 Keyboard Data 키보드 커넥터 Keyboard Connector Up side + 16-14-12-10-08-06-04-02-no-co + + 15-13-11-09-07-05-03-01-ch-co + ch : 섀시에 연결 chassis co : 서로 연결 Connected to each other. no : 안 씀 not used * Board : 03pin – GND