Atari Touch Me

Chip labeled 
PIC 1655A-053

8 buttons: Start, Last, High, Skill, Blue, Yellow, Red, Green
1 switch: Difficulty 1, 2 or 3
Piezo buzzer
4 LEDs
2-digit 7-segment LED

PIC1655A pinout

1  /RTCC   - pin 26
2  VDD     - 
3  VXX     - 
4  VSS     - Batt -
5  TEST    - VSS
6  RA0     - Start / Blue buttons / difficulty 1
7  RA1     - Last / Yellow buttons / difficulty 2
8  RA2     - High / Red buttons / difficulty 3
9  RA3     - Skill / Green buttons
10 RB0     - Start / Last / High / Skill buttons and digit 2 (left)
11 RB1     - Blue / Yellow / Red / Green buttons and digit 1 (right)
12 RB2     - difficulty level common
13 RB3     - LED #1 (blue)
14 RB4     - LED #2 (yellow)
15 RB5     - LED #3 (red)
16 RB6     - LED #4 (green)
17 RB7     - piezo
18 RC0     - segment A
19 RC1     - segment B
20 RC2     - segment C
21 RC3     - segment D
22 RC4     - segment E
23 RC5     - segment F
24 RC6     - segment G
25 RC7     - piezo
26 CLK OUT - pin 1
27 OSC     - 100K resistor to VDD, 47pf cap to VSS
28 /MCLR   - resistor and cap


START   LAST     HIGH     SKILL

     BLUE            YELLOW
     
     RED             GREEN
     
ON/OFF               1/2/3


     A0      A1      A2      A3
B0  Start   Last    High    Skill
B1  Blue   Yellow   Red     Green
B2 diff 1  diff 2  diff 3    --


Piezo connection
B7 to diode to piezo lead 1, which is tied to VCC with 2.2K
C7 to diode to piezo lead 2, which is tied to VCC with 2.2K