Conic Electronic IQ Model 03051

Chip labeled 
TMS1000NLL
MP0908
MBSL 8005
SINGAPORE

die labeled
MP0908

20 buttons
1 switch: game 1/2
2 7-segment LEDs
30 LEDs
Piezo buzzer


TMS1000 pinout
1  R8   - digit 2 (left)
2  R9   - Game 2 switch
3  R10  - n/c
4  VDD  - batt -
5  K1   - A-F, Game 2
6  K2   - 1-5
7  K4   - NE, NW, SE, SW
8  K8   - N, S, E, W
9  INIT - diode to VDD
10 O7   - n/c
11 O6   - segment G and row 5 (top)
12 O5   - segment F and row 4
13 O4   - segment E and row 3
14 O3   - segment D
15 O2   - segment C
16 O1   - segment B and row 2
17 O0   - segment A and row 1 (bottom)
18 OSC1 - OSC2 and 50pF cap to VSS, 47K resistor to VDD
19 OSC2 - OSC1
20 VSS  - batt + via switch
21 R0   - piezo and 5K1 to VDD, other piezo lead to VDD
22 R1   - column 1 (left)
23 R2   - column 2
24 R3   - column 3
25 R4   - column 4
26 R5   - column 5
27 R6   - column 6 (right) 
28 R7   - digit 1 (right)


button matrix

        K1          K2           K4         K8
R1      A           1            NW         N
R2      B           2            NW         S
R3      C           3            SW         W
R4      D           4            SE         E
R5      E           5            --         --
R6      F           --           --         --
R9   Game 2         --           --         --

Reset button connects INIT to VSS


LEDs

   R1   R2   R3   R4   R5   R6 
O6 o    o    o    o    o    o
O5 o    o    o    o    o    o
O4 o    o    o    o    o    o
O1 o    o    o    o    o    o
O0 o    o    o    o    o    o