[Mar/04/2002]

Racin' Force
Konami 1993

Runs on Konami System GX hardware. 
Lower (ROM) board is Sub PCB Type 1

TOP BOARD (SYSTEM GX Mother PCB)
--------------------------------

PCB No: PWB354192C  AI-AM-2
CPU   : 68EC020FG25  (68020)
SND   : MC68EC000FN8 (68000) (plus other Konami chips, see below)
OSC   : 18.432MHZ / 32.000MHZ (combined in 1 OSC), 48.000MHz
DIP SW: 8 position (x1)

CUSTOM CHIPS:
             056879 (x2, near 68020)
             054338 (near 056879's)
             056766 (near 054338)
             056800 (near 68000)
             TMS570020PHA (near 056800)
             054539 (x2, near TMS570020)
             054156 (near 054539's)             
             056832 (near 054156)
             055555 (near 056832)
             053246A(near 055555)
             055673 (near 053246A)
             053252 (near 053246A)

RAM   : OKI M51257   (256k SRAM, x4, near 68020     )
        SONY CXK5863 (64k  SRAM, x3, near 054338    )
        SONY CXK5864 (64k  SRAM, x2, near 68000     )
        OKI M514256  (1M   DRAM, x2, near TMS570020 )
        OKI M51257   (256k SRAM, x3, near 054156    )
        SONY CXK5864 (64k  SRAM, x2, near 053246A   )
        
OTHER : 93C46 EEPROM
        Push button to access Test Mode
        4 Pin connector for Stereo Sound OUT
        Some PALs

ROMs  :
                             Byte
Filename      Type           C'sum
----------------------------------
300A01.34k    1M MASK ROM    255Bh    System GX BIOS


----


BOTTOM BOARD (SYSTEM GX SUB PCB Type 1)
---------------------------------------

PCB No: PWB354207B
CUSTOM CHIPS:
             KS10011-PF 053936
             KS40011-PF 056230
             056540

RAM   : PDM41256     (256k SRAM, x3,  near 053936 )
        SONY CXK5864 (64k  SRAM, X2,  near 053936 )
        CY7C185      (64k  SRAM, X1,  near 053936 )
        SONY CXK5864 (64k  SRAM, X1,  near 056230 & 250UAB02/250UAB03 )
        SONY CXK5864 (64k  SRAM, X1,  near 056540 )
        OKI M514256  (1M   DRAM, x12, near 056540 & 250A06/250A07)
    
OTHER : 
        *Unpopulated* position for 056734 and (4x) 256k SRAM's
        Some PALs

ROMs:
                             Byte
Filename      Type           C'sum
----------------------------------
250UAB02.34N   27C4096       2C4Dh
250UAB03.31N   27C4096       CF6Eh
250A04.34S    16M MASK       3558h
250A05.31S    16M MASK       76C8h
250A06.8P      1M MASK       6EA6h
250A07.6P      1M MASK       B217h
250A08.36Y    16M MASK       8A83h
250A10.31Y    16M MASK       72FFh
250A11.28Y    16M MASK       1A78h
250A12.26Y    16M MASK       66E8h
250A13.24Y    16M MASK       9F5Dh
250A14.21Y     HN62444       54E6h
250A15.19Y    16M MASK       A21Ah
250A17.14Y    16M MASK       B8D6h
250A18.12Y    16M MASK       030Ch
250A20.10D    16M MASK       3A42h
250A21.7D     16M MASK       B412h
250A22.5D     16M MASK       058Ah
250A24.10H    16M MASK       6282h
250A25.7H     16M MASK       2930h
250A26.5H     16M MASK       C52Ah

Note: Some ROMs contain identical halves, but I leave them as is for now. (they all appear to be 16M)
In any case, it's a simple matter to chop them in half if they are found to be 8M ROMs at a later date.

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