Entex Jackpot Blackjack & Gin Rummy

Chip labeled 
MPF553
MHL^8027

die labeled
MPF553

19 buttons: 0-9, MD/GO, DL, DS/BT, CE, T, DB, KN/SP, DR/HT, CH/ST
1 Switch: BJ, GIN
11-digit 8-segment VFD
piezo


TMS1670 pinout
1   R1   - VFD digit 2 and keypad row
2   R2   - VFD digit 3 and keypad row
3   R3   - VFD digit 4 and keypad row
4   R4   - VFD digit 5 and keypad row
5   R5   - VFD digit 6 and keypad row
6   R6   - VFD digit 7
7   R7   - VFD digit 8
8   R8   - VFD digit 9
9   R9   - VFD digit 10
10  R10  - VFD digit 11 (leftmost) and BJ/GIN switch
11  R11  - Club segment
12  R12  - Diamond segment
13  R13  - Heart segment
14  R14  - Spade segment
15  R15  - 2.4KHz oscillator to piezo
16  VDD  - battery - 
17  INIT - diode and cap
18  K1   - input matrix
19  K2   - input matrix
20  K4   - input matrix
21  K8   - input matrix
22  N/C
23  N/C
24  N/C
25  N/C
26  O7   - segment H
27  O6   - segment G
28  N/C
29  N/C
30  O5   - segment F
31  O4   - segment E
32  O3   - segment D
33  O2   - segment C
34  O1   - segment B
35  O0   - segment A
36  OSC1 - 47pF disc cap, 47K resistor
37  OSC2 - OSC1
38  N/C
39  VSS  - battery +
40  R0   - VFD digit 1 (rightmost) and keypad row


input matrix
        K1        K2        K4        K8
R0     10/0       6        DR/HT      DL
R1      1         7        KN/SP      T
R2      2         8        DS/BT      -
R3      3         9        MD/GO      DB
R4      4         -        CA/ST      -
R5      5         -         CE        -
R10     -         BJ       GIN        -