Entex Color Football 4

Chip labeled 
6009
MP7551
ML ^ 8027

die labeled
MP7551

16 buttons
2 switches- Am/Pro, Man/Auto
60 LEDs - 30 red, 30 green
9-digit VFD; digits 1, 4, 7 not used, DP not used
piezo

TMS1670 pinout
1   R1   - LED matrix red row 2 / Player 2 Up, Dn, Lt, Rt
2   R2   - LED matrix red row 3 / Player 1 R, P, K
3   R3   - LED matrix red row 4 / Player 2 R, P, K
4   R4   - LED matrix red row 5 (bottom) / Auto / Pro / ST
5   R5   - LED matrix green row 1 (top)
6   R6   - LED matrix green row 2
7   R7   - LED matrix green row 3
8   R8   - LED matrix green row 4
9   R9   - LED matrix green row 5 (bottom)
10  R10  - VFD digit 9
11  R11  - VFD digit 8
12  R12  - VFD digit 6
13  R13  - VFD digit 5
14  R14  - VFD digit 3
15  R15  - VFD digit 2
16  VDD  - battery - 
17  INIT - diode and cap
18  K1   - Left, R, Auto
19  K2   - Up, P, Pro
20  K4   - Right, K, ST
21  K8   - Down
22  N/C
23  N/C
24  N/C
25  N/C
26  O7   - piezo
27  O6   - VFD segment G
28  resistor to VDD
29  resistor to VDD
30  O5   - VFD segment F / LED matrix column 6
31  O4   - VFD segment E / LED matrix column 5
32  O3   - VFD segment D / LED matrix column 4
33  O2   - VFD segment C / LED matrix column 3
34  O1   - VFD segment B / LED matrix column 2
35  O0   - VFD segment A / LED matrix column 1
36  OSC1 - 47pF disc cap, 42K resistor
37  OSC2 - OSC1
38  N/C
39  VSS  - battery +
40  R0   - LED matrix red row 1 (top) / Player 1 Up, Dn, Lt, Rt


input matrix
       K1       K2       K4       K8
R0   Left 1    Up 1    Right 1   Down 1
R1   Left 2    Up 2    Right 2   Down 2
R2    R 1      P 1      K 1
R3    R 2      P 2      K 2
R4    Auto     Pro