[MAME]

Namco NA2 hardware
------------------

PCB Layout
----------

NA-2 GAME PCB
8627961102
(8627963102)
|---------------------------------------------|
|  LA4705           T062               |----| |
|         JP3   51568  LC7881          | 6  | |
|J        210              LH52250     | 8  | |
|A    VOL1      VOL2       LH52250     | 0  | |
|M                         |--------|  | 0  | |
|M            |------|     |  C218  |  | 0  | |
|A  TC514256  | 215  |     |        |  |----| |
|   TC514256  |      |     |        |         |
|             |------|     |--------|50.113MHz|
|            |---------ROM-BOARD--------------+
|     TC51832|  LH5168       TC514256         |
|   DSW(2)   |               TC514256         |
|            |               TC514256         |
|            |               TC514256         |
|            | |----|       |--------|    J103|
|4   IR2C24  | |C70 |       |  219   |        |
|8           | |----|       |        |        |
|W   PC9D10  |              |        |        |
|A     IR2C24|              |--------|        |
|Y           |       3773           TC51832   |
|------------+--------------------------------|
Notes:
       68000 clock - 12.5282MHz [50.113/4]
       TC51832     - 32k x8 SRAM (SOP28)
       TC514256    - 256k x4 DRAM (ZIP19)
       LH5168      - 8k x8 SRAM (SOP28)
       LC7881      - Sanyo 16bit DAC (SOIC20)
       LH52250     - 32k x8 SRAM (SOP28)
       51568       - ??, possibly audio related functions, manufactured by Mitsubishi (SOIC24)
       LA4705      - 15W 2-Channel Audio Power Amplifier (SIL18)
       T062        - Op AMP? (SOIC8)
       3773        - System reset and watchdog IC (SOIC8)
       J103        - Multi pin connector for ROM Board
       JP3         - Stereo/Mono jumper. For stereo, use pin 1 and 2 of the 48-WAY Namco connector for the 2nd speaker
       VSync       - 60Hz
       HSync       - 15.73kHz
       Namco Custom-
                     C218- (QFP208)
                     C70 - rebadged M37702 (QFP80)
                     219 - (QFP160)
                     215 - (QFP176)
                     210 - tied to some audio parts & C215 (SOP28)

ROM Board
---------

NA E4M8 ROM PCB
8626961200
(8626963200)
|--------------------------------+
| PAL1    28C16        KEYCUS    |
| PAL2                           |
|                                |
| ROM.7F   ROM.5F  ROM.3F        |
|   ROM.6F  ROM.4F  ROM.2F   J201|
|                                |
|                                |
|                                |
| ROM.7C   ROM.5C  ROM.3C        |
|   ROM.6C  ROM.4C  ROM.2C       |
+--------------------------------|
Notes:
      J201   - Multi pin connector for main board
      KEYCUS - C365 for 'Nettou! Gekitou! Quiztou!!' (DIP32)
      PAL1   - PAL16L8 labelled 'NR1R2' (DIP20)
      PAL2   - PAL16L8 labelled 'NR1R10' (DIP20)
      ROMs   -
               7F/6F/7C/6C - 27C040 EPROM (DIP32)
               All other ROMs are MB838000 8MBit MaskROM (DIP32)
               ROM Names/locations for 'Nettou! Gekitou! Quiztou!!'....
               QT1EP1L.7C
               QT1EP1U.7F
               QT1EP0L.6C
               QT1EP0U.6F
               QT1MA3L.5C
               QT1MA3U.5F
               QT1MA2L.4C
               QT1MA2U.4F
               QT1MA1L.3C
               QT1MA1U.3F
               QT1MA0L.2C
               QT1MA0U.2F

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