Coleco Head to Head Boxing

Chip labeled 
TMS1100NLL
M34018-N2
WES 8118
PHILIPPINES

12 buttons
1 switch
2 7-segment LEDs
42 LEDs
piezo

schematics in patent US4366960

TMS1100 pinout
1  R8   - piezo
2  R9   - left digit
3  R10  - right digit
4  VDD  - battery - via switch
5  K1   - inputs
6  K2   - inputs
7  K4   - inputs
8  K8   - inputs
9  INIT - VDD
10 O7   - LED matrix
11 O6   - segment G
12 O5   - segment F
13 O4   - segment E and LED matrix
14 O3   - segment D and LED matrix
15 O2   - segment C and LED matrix
16 O1   - segment B and LED matrix
17 O0   - segment A and LED matrix
18 OSC1 - 100pF disc cap to VSS, 39K resistor to VDD
19 OSC2 - OSC1
20 VSS  - battery +
21 R0   - inputs and LED matrix
22 R1   - inputs and LED matrix
23 R2   - inputs and LED matrix
24 R3   - inputs and LED matrix
25 R4   - inputs and LED matrix
26 R5   - LED matrix
27 R6   - LED matrix
28 R7   - LED matrix


Input Matrix

         K1               K2              K4           K8
      --------         --------      ----------    ----------
R0    player 2            --              --           --
R1      fwd 1           back 1          left 1      right 1
R2      fwd 2           back 2          left 2      right 2
R3   punch 1/pro    block 1/amateur       --           --
R4       --               --           punch 2      block 2

 

LED Layout

O output   01234
        **  - -
        R0 | | |
        R0  - -
        R1 | | |
        R1  - -
        R2 | | |
        R2  - -
        R3 | | |
        R3  - -
        R4 | | |
        R4  - -
        R5 | | |
        R5  - -
        R6 | | |
        R6  - -
        R7 | | |
        R7  - -
        
 ** these 2 LEDs are controlled differently:
 O7+R9 for left, O7+R10 for right