[MAME]

Real Battle Mahjong King by 'Game Men System Co. Ltd.'

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

No.6899-B
|--------------------------------------------------------|
|UPC1241H          YM3014  YM2151    14.31818MHz         |
|     VOL       358                  89C51        B1     |
|          M6295                                         |
|                  S1      PAL                           |
|                                             A1         |
|                                                        |
|J                                           6116        |
|A                 P1                        6116        |
|M   DSW3                                                |
|M   DSW2                                                |
|A   DSW1   DSW4                                         |
|                               |-------|    6116        |
|                               |LATTICE|    6116  PAL   |
|               62256    62256  |1032E  |                |
|                               |       |    T1          |
|                    68000      |-------|                |
| 3.6V_BATT     |-------------|                          |
|               |        93C46|                          |
|               |             |                          |
|               |  *          |              6116        |
|               |             |  22MHz       6116        |
|---------------|PLASTIC COVER|--------------------------|
Notes:
      68000 clock - 11.000MHz [22/2]
      VSync       - 58Hz
      Hsync       - none (dead board, no signal)
      M6295 clock - 1.100MHz [22/20], sample rate = 1100000 / 165, chip is printed 'AD-65'
      YM2151 clock- 2.750MHz [22/8], chip is printed 'K-666'. YM3014 chip is printed 'K-664'
                * - Unpopulated position for PIC16F84
        3.6V_BATT - Purpose of battery unknown, does not appear to be used for backup of suicide RAM,
                    and there's no RTC on the board.
            93C46 - 128 x8 EEPROM. This chip was covered by a plactic cover. There's nothing else under
                    the cover, but there was an unpopulated position for a PIC16F84
            89C51 - Atmel 89C51 Microcontroller (protected)

      ROMs -
            P1 - Hitachi HN27C4096  (Main PRG)
            T1 - Macronix MX27C4000 (GFX)
            A1 - Atmel AT27C080     (GFX)
            B1 - Macronix MX261000  (GFX?? or PRG/data for 89C51?)
            S1 - Macronix MX27C2000 (OKI samples)


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