Tandy Championship Football 60-2150

Chip labeled 
TMS1100NLL
MP1193
MDSL 8001
SINGAPORE

8 buttons
1 switch
7 7-segment LEDs
27 LEDs
piezo

TMS1100 pinout
1  R8   - transistor to enable LED matrix
2  R9   - transistor to enable digits
3  R10  - Piezo
4  VDD  - battery -
5  K1   - inputs
6  K2   - inputs
7  K4   - inputs
8  K8   - inputs
9  INIT - VDD
10 O7   - digit 4 DP and LED matrix
11 O6   - segment G and LED matrix
12 O5   - segment F and LED matrix
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 - 24pF disc cap to VSS, 56K resistor to VDD
19 OSC2 - OSC1
20 VSS  - battery + via switch
21 R0   - digit 1 (right) and LED matrix
22 R1   - digit 2 and LED matrix
23 R2   - digit 3 and LED matrix
24 R3   - digit 4 and LED matrix
25 R4   - digit 5
26 R5   - inputs and digit 6
27 R6   - inputs and digit 7 (left)
28 R7   - inputs


Input Matrix
         K1          K2          K4          K8
      -------     -------     -------     -------
R5     Right        Left        Down         Up
R6     Score       Status       Pass        Kick
R7       --          --          --         Pro


7-segment LEDs
R6 R5    R4 R3 R2    R1 R0
#  #     #  #. #     #  #
 

LED Layout
    O7  O6  O5  O4  O3  O2  O1  O0  R3
R2  o   o   o   o   o   o   o   o   *
R1  o   o   o   o   o   o   o   o   *
R0  o   o   o   o   o   o   o   o   *

* these 3 LEDs are connected differently:
R3+O0 for bottom, R3+O1 for middle, R3+O2 for top