[MAME]

Skat TV (Version TS3)
Three board stack.

CPU Board:
----------
 ____________________________________________________________
 |           ______________  ______________     ___________ |
 | 74HC245N  | t1 i       |  |KM681000ALP7|     |+        | |
 | 74HC573   |____________|  |____________|     |  3V Bat | |
 |                                              |         | |
 |           ______________  ______________     |        -| |
 |           | t1 ii      |  |KM681000ALP7|     |_________| |
 |     |||   |____________|  |____________| |||             |
 |     |||   ___________                    |||  M62X42B    |
 | X   |||   |         |                    |||             |
 |     |||   |68EC000 8|  74HC32   74HC245  |||  MAX691CPE  |
 |     |||   |         |  74AC138  74HC573  |||    74HC32   |
 |           |         |                                    |
 | 74HC573   |_________|  74HC08   74HC10  74HC32  74HC21   |
 |__________________________________________________________|

Parts:

 68EC000FN8         - Motorola 68k CPU
 KM681000ALP7       - 128K X 8 Bit Low Power CMOS Static RAM
 OKIM62X42B         - Real-time Clock ic With Built-in Crystal
 MAX691CPE          - P Reset ic With Watchdog And Battery Switchover
 X          - 8MHz xtal
 3V Bat             - Lithium 3V power module

Video Board:
------------
 ____________________________________________________________
 |           ______________  ______________                 |
 |           | t2 i       |  |KM681000ALP7|     74HC573     |
 |           |____________|  |____________|                *|
 |                                              74HC573    *|
 |           ______________  ______________                *|
 |           | t2 ii      |  |KM681000ALP7|               P3|
 |       ||| |____________|  |____________|   |||          *|
 |       ||| ___________                      |||          *|
 |       ||| |         |                      |||          *|
 |       ||| | HD63484 |  74HC04   74HC00     |||         P6|
 |       ||| |         |  74HC74   74HC08     |||  74HC245  |
 |           |         |                                    |
 | 74HC573   |_________|  74HC166  74HC166 74HC166 74HC166  |
 |__________________________________________________________|

Parts:

 HD63484CP8         - Advanced CRT Controller
 KM681000ALP7       - 128K X 8 Bit Low Power CMOS Static RAM

Connectors:

 Two connectors to link with CPU Board
 Two connectors to link with Sound and I/O Board
 P3  - Monitor
 P6  - Lightpen

Sound  and I/O board:
---------------------
 _________________________________________________________________________________
 |                        TS271CN    74HC02                        ****  ****    |
 |*                      ________________                          P1    P2     *|
 |*         74HC574      | YM2149F      |                                       *|
 |*                  ||| |______________|   74HC393  74HC4015 |||               *|
 |P3        74HC245  |||                                      |||              P6|
 |*                  ||| ________________          X          ||| TL7705ACP     *|
 |*                  ||| |SCN68681C1N40 |                     |||               *|
 |*                  ||| |______________|   74HC32   74AC138  |||               *|
 |P7                 |||                                      |||              P8|
 |*                        TC428CPA                                             *|
 |*                                                                             *|
 |*    P11  P12    P13    P14       P15   P16   P17      P18   P19   P20  P21   *|
 |P9   **** *****  *****  ****  OO  ****  ****  *******  ****  ****  ***  *** P10|
 |_______________________________________________________________________________|

Parts:

 YM2149F         - Yamaha PSG
 SCN68681C1N40   - Dual Asynchronous Receiver/transmitter (DUART);
 TS271CN         - Programmable Low Power CMOS Single Op-amp
 TL7705ACP       - Supply Voltage Supervisor
 TC428CPA        - Dual CMOS High-speed Driver
 OO              - LEDs (red)
 X               - 3.6864MHz xtal

Connectors:

 Two connectors to link with Video Board
 P1  - Tueroeffn
 P2  - PSG In/Out
 P3  - Lautsprecher
 P6  - Service - Tast.
 P7  - Maschine (barely readable)
 P8  - Muenzeinheit
 P9  - Atzepter
 P10 - Reset Fadenfoul
 P11 - Netzteil
 P12 - Serienplan
 P13 - Serienplan 2
 P14 - Muenzeinheit 2
 P15 - I2C Bus
 P16 - Kodierg.
 P17 - TTL Ein-Aueg.
 P18 - Out
 P19 - In
 P20 - Serielle-S.
 P21 - Tuerschalter

There's also (external) JAMMA adapter - 4th board filled with resistors and diodes.

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