[MAME]

Riot
NMK, 1992

This game runs on Tecmo hardware.

PCB Layouts -

MAIN BOARD
----------

8901A-4 TECMO
|--------------------------------------------------------------------|
|LA4460                                    |----------------------|  |
|           |-----|          6264          |----------------------|  |
|           |     |                   |--------|    |--------|       |
|           |     |          6264     |        |    |        | 62256 |
|   LM324   |68000|                   |TECMO-8 |    |TECMO-07|       |
|           |     |                   |        |    |        |       |
|   LM324   |     |                   |        |    |        |       |
|           |     |                   |--------|    |--------|       |
|           |     |                                                  |
|           |     |       |-----|                                |-| |
|   YM3012  |-----| PAL1  |TECMO|                   6116   6116  | | |
|J                        |-11  |                                | | |
|A                        |-----|                                | | |
|M                                  4464                         | | |
|M                 4464   4464      4464    4464    4464   4464  | | |
|A                 4464   4464      4464            4464   4464  | | |
|                                                                |-| |
|                           |--------|                   |--------|  |
|                           |        |     |-----|       |        |  |
|                           |TECMO-10|     |TECMO|       |TECMO-06|  |
|      24MHz        YM2151  |        |     |-12  |       |        |  |
|    |--------|             |        |     |-----|       |        |  |
|    |        |             |--------|                   |--------|  |
|    |TECMO-9 |       PAL2                                           |
|    |        |                                                      |
|    |        |       6264                        |-------------|    |
|    |--------|               M6295          8MHz |   TECMO-5   |    |
|                                                 |-------------|    |
|                                          |----------------------|  |
|  DSW2(8)  DSW1(8)   Z80                  |----------------------|  |
|--------------------------------------------------------------------|
Notes:
      68000 clock 12.000MHz [24/2]
      Z80 clock 4.000MHz [24/6]
      YM2151 clock 4.000MHz [24/6]
      M6295 clock 1.000MHz [8/8], sample rate 1000000/132
      VSync 60Hz
      PAL1 - AMI 18CV8 stamped 'T-11'
      PAL2 - AMI 18CV8 stamped 'T-12'

      Custom Tecmo IC's - 
                         TECMO-5   MCU? clock input 6.000MHz on pin15 (SDIP64)
                         TECMO-06, also stamped 'YM6048' (QFP160)
                         TECMO-07, also stamped 'YM6621' (QFP160)
                         TECMO-8   (QFP136)
                         TECMO-9,  also stamped 'MN53030XTB' (QFP124)
                         TECMO-10  (QFP128)
                         TECMO-11, also stamped 'MN51005XTC' (QFP64)
                         TECMO-12, also stamped 'MN51005XTD' (QFP64)


ROM BOARD
---------

TECMO OBD ROM 8901B
B-82778 (sticker)
|---------------------------------|
|       |----------------------|  |
|       |----------------------|  |
|                                 |
|                                 |
|                                 |
|  7   8    *    *    *    9      |
|                                 |
|                                 |
|                                 |
|                                 |
|                                 |
|                                 |
|  *   *    *    *    *    6      |
|                             |-| |
|                             | | |
|                             | | |
|                             | | |
|                             | | |
|                             | | |
|  *   4    *    *    *    5  | | |
|                             |-| |
|                                 |
|                                 |
|                                 |
|                                 |
|           1    2         3      |
|                                 |
|                                 |
|       |----------------------|  |
|       |----------------------|  |
|---------------------------------|
Notes:
      * = empty solder location for ROM (no socket)

-

[Nov/11/2004]

Riot  
NMK 1992  
  
CPU:
1x 68000 12.000MHz (main)
1x Z80 4.000MHz (sound)
1x YM2151 4.000MHz (sound)
1x SMS6295 7.575MHz (sound)  

Dumped 20/12/2004  

-