[MAME]

    Data East MLC Hardware:

    The MLC system is basically an 8" x 6" x 2" plastic box with a JAMMA connector on it.
    The PCB's are very compact and have almost entirely surface mounted components on both
    sides of both boards. One board contains the RAM, sound hardware and I/O, the other
    board contains the CPU and ROMs. All main boards are identical between the MLC games and
    can be changed just by plugging in another game and pressing test to reset the EEPROM
    defaults.

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

    Jamma Side:

    DE-0444-1
    |-----------------------------|
    |                             |
    | W24257            DE150     |
    |   W24257                    |
    |                             |
    |J                      93C45 |
    |A                            |
    |M                            |
    |M               DE223        |
    |A                            |
    |                             |
    |                42MHz  W24257|
    |                       W24257|
    |                       W24257|
    |            XILINK     W24257|
    |5            XC3130          |
    |0                            |
    |P                            |
    |I YMZ280B   YAC513           |
    |N                            |
    |-----------------------------|
    Notes:
        - Yamaha YMZ280B clock: 14.000MHz (42 / 3)
        - DE150 custom (GFX)
        - DE223 custom (GFX)
        - Xilinx XC3130 (TQFP100, Bus Controller?)
        - YAC513 D/A converter
        - 93C45 EEPROM, 128 bytes x 8 bit (equivalent to 93C46)
        - All SRAM is Winbond W24257S-70LL (32kx8)
        - 50 PIN connector looks like flat cable SCSI connector used on any regular PC SCSI controller card. It appears
        to be used for extra controls and hookup of a 2nd speaker for stereo output. It could also be used for externally
        programming some IC's or factory diagnostic/repairs?
        - Bottom side of the JAMMA side contains nothing significant except a sound AMP, test SW, LED, some
        logic chips and connectors for joining the PCBs together.
        - Vsync: 58Hz

    As the CPU is stored on the game board it is possible that each game could
    have a different CPU - however there are only two known configurations.  Avengers
    in Galactic Storm uses a SH2 processor, whereas all the others use a custom Deco
    processor (156 - encrypted ARM).

    Skull Fang:

    DE-0445-1 (top)                     DE-0445-1 (bottom)
    |-----------------------------|     |-----------------------------|
    |                             |     |                             |
    |                             |     |                             |
    |                             |     |           DE156     MCH-07  |
    |  MCH-06             SH00-0  |     |                             |
    |                             |     |                             |
    |                     SH01-0  |     |                             |
    |                             |     |                             |
    |                             |     |                             |
    |                             |     |                             |
    |                             |     |                             |
    |                             |     |                             |
    | MCH-04    MCH-02    MCH-00  |     |                             |
    |                             |     |                             |
    |                             |     | MCH-01    MCH-03    MCH-05  |
    |                             |     |                             |
    | SH02-0                      |     |                             |
    |                             |     |                             |
    |                             |     |                             |
    |                             |     |                             |
    |-----------------------------|     |-----------------------------|

    Notes:
        - DE156 clock: 7.000MHz (42MHz / 6, QFP100, clock measured on pin 90)

        Stadium Hero contains a '146' protection chip on the ROM/CPU pcb, but
        it is barely used by the game (only checked at startup).  See decoprot.c

-