Coleco Head To Head Baseball

Chip labeled 
TMS1170 NLN
MP1525-N2
OAS 8031
PHILIPPINES

die labeled
MP1525

9 buttons
1 switch: Skill 1/Skill 2
9-digit 7-segment VFD (digit 5 not used)
9 LEDs
speaker


TMS1170 pinout
1  R8   - LED enable
2  R9   - LED 7
3  R10  - speaker and VFD filament
4  VDD  - battery - 
5  K1   - input matrix
6  K2   - input matrix
7  K4   - input matrix
8  K8   - input matrix
9  INIT - VDD
10 O7   - N/C
11 O6   - segment G
12 O5   - segment F
13 O4   - segment E
14 O3   - segment D
15 O2   - segment C
16 O1   - segment B
17 O0   - segment A
18 OSC1 - 47pF disc cap, Skill 1 = 51K resistor or Skill 2 = 43K resistor
19 OSC2 - OSC1
20 VSS  - battery +
21 R0   - LED 2 and VFD digit 9 (leftmost)
22 R1   - LED 3 and VFD digit 8
23 R2   - LED 4 and VFD digit 7
24 R3   - LED 5 and VFD digit 6
25 R4   - LED 6 and VFD digit 4
26 R5   - LED 9 and VFD digit 3
27 R6   - LED 8 and VFD digit 2
28 R7   - LED 1 and VFD digit 1 (rightmost)


input matrix
        K1        K2        K4        K8
R4      -         -         N         -
R5      B         -         -         -
R6      P         S         -         -
R7    Curve   Fast Pitch    -         -
VSS     -         -         -       Swing


LED numbering
                1
                
                
                
                2
  7                           8
                3
                
                4
                
                5   9
                
                6