Comp IV

chip top marked TMC0904NL AP 7716
chip bottom marked CP0904A SINGAPORE
die labeled 0970D-04A

10 LEDs - Number 1-5, Sequence 1-4, R
12 pushbuttons - 0-9, R, E

         keypad layout
-------------------------------
         Pin 17  Pin 16  Pin 15
Pin 9      7       8       9
Pin 8      4       5       6
Pin 7      1       2       3
Pin 5      R       0       E

The game I have has an 8x5 keypad with every
other row and column unused.

Pin 1 -  Sequence LED 3
Pin 2 -  Sequence LED 4
Pin 3 -  LED R
Pin 4 -  9V battery negative (via on/off switch)
Pin 5 -  keypad row 0
Pin 6 -  Number LED 4
Pin 7 -  keypad row 1
Pin 8 -  keypad row 2
Pin 9 -  keypad row 3
Pin 10 - N/C
Pin 11 - N/C
Pin 12 - N/C
Pin 13 - N/C
Pin 14 - N/C
Pin 15 - keypad column 2
Pin 16 - keypad column 1
Pin 17 - keypad column 0
Pin 18 - LED common
Pin 19 - N/C
Pin 20 - 9v battery positive
Pin 21 - Number LED 1
Pin 22 - Number LED 2
Pin 23 - N/C
Pin 24 - Number LED 3
Pin 25 - N/C
Pin 26 - Number LED 5
Pin 27 - Sequence LED 1
Pin 28 - Sequence LED 2

Output O PLA
11011010
10010110
10011011
10010111
10011000
10010100
10011001
10010101
10011010
10100000
10010100
00000010
00110101
01001010
01000001
00000000