Code Name: Sector chip top marked MP0905BNL ZA0379 BSP 7731 chip bottom marked DP0905BS SINGAPORE die labeled 0970F-05B 6 7-segment LEDs (1 space 2 space 3456) 4 LEDs (NSEW) 13 pushbuttons - Range, Aim, Fire, Sub Finder, Teach Mode, Left, Right, Evasive Sub, Slow, Fast, Next Ship, Recall, Move Ship keypad layout -------------------------------------- Pin 9 Pin 7 Pin 5 Pin 18 Range Left Next Pin 17 Aim Right --- Pin 16 Fire Evasive Recall Pin 15 Finder Slow --- Pin 14 Teach Fast Move The keypad has 6 rows and 4 columns; one keypad button is used for the power switch, making the other buttons in that row and column unusable. The power switch slides a clip that holds the button down to power the game. Pin 1 - South LED Pin 2 - East LED Pin 3 - West LED Pin 4 - 9V battery negative (via on/off switch) Pin 5 - keypad column 2 Pin 6 - N/C Pin 7 - keypad column 1 Pin 8 - N/C Pin 9 - keypad column 0 Pin 10 - N/C Pin 11 - Segment DP Pin 12 - Segment G Pin 13 - Segment F Pin 14 - Segment E Pin 15 - Segment D Pin 16 - Segment C Pin 17 - Segment B Pin 18 - Segment A Pin 19 - N/C Pin 20 - 9v battery positive Pin 21 - Digit 6 Pin 22 - Digit 5 Pin 23 - N/C Pin 24 - Digit 4 Pin 25 - Digit 3 Pin 26 - Digit 2 Pin 27 - Digit 1 Pin 28 - North LED Output O PLA 01111110 0 00110000 1 01101101 2 01111001 3 00110011 4 01011011 5 01011111 6 01110000 7 01111111 8 01111011 9 00111110 U 10000000 . 00000000 01001110 C 01000111 F 00001110 L