Milton Bradley Arcade Mania

Chip labeled 
M34078A-N2LL
FGU 8306
4360 PHILIPPINES

9 buttons
9 LEDs
speaker

TMS1100 pinout
1  R8   - LED 8
2  R9   - LED 9
3  R10  - N/C
4  VDD  - battery - via transistor
5  K1   - key pad column 1 left
6  K2   - key pad column 2 center
7  K4   - key pad column 3 right
8  K8   - N/C
9  INIT - VDD
10 O7   - N/C
11 O6   - key pad row 3 top and base of transistor
12 O5   - key pad row 3 top
13 O4   - key pad row 2 middle
14 O3   - key pad row 1 bottom
15 O2   - O1+O0 and NKN to speaker and diode to VDD
16 O1   - O2
17 O0   - O2
18 OSC1 - 100pF disc cap to VSS, 56K resistor to VDD
19 OSC2 - OSC1
20 VSS  - battery +
21 R0   - N/C
22 R1   - LED 1
23 R2   - LED 2
24 R3   - LED 3
25 R4   - LED 4
26 R5   - LED 5
27 R6   - LED 6
28 R7   - LED 7


Input Matrix
           K1          K2          K4  
        -------     -------     -------
O6         1           2           3
O4      Run Amok    Yellow    Sneak Attack
O3   Alien Raiders  Yellow      Rattler

Seperately, O5 connects to VSS when buttons 1, 2 and 3 are pressed.  This turns on
the power by driving the resistor.

LED Layout
    1   2   3
    4   5   6
    7   8   9