[MAME]

Scud Race
Sega, 1996

Tis game runs on Sega Model 3 Step 1.5 hardware


Sound Board (bolted to outside of the metal box)
-----------

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

PCB Number: 837-10084 DIGITAL AUDIO BD (C) SEGA 1993
---------------------------------------------------------------
84256     D71051GU-10                 D6376    SM5840
EPR19612
Z80             16MHz     SEGA                D65654GF102
                          315-5762            (QFP100)
                          (PLCC68)
                     20MHz           KM68257
                                     KM68257          84256
                                     KM68257
                                          12.288MHz   MPR19603
                                                      MPR19604
                                                      MPR19605
DSW1                                                  MPR19606
----------------------------------------------------------------


Jumpers
JP1: 1-2 (Select 16M ROM on bank 1 - ic57 & ic58)
JP2: 1-2 (Select 16M ROM on bank 2 - ic59 & ic60)



ROM Board
---------

PCB Number: 837-11860 MODEL3 ROM BOARD (C) SEGA 1995

(For dumping reference)

Jumpers    centre pin joins
-------------------------------------------------------
JP3: 2-3   pin2 of ic 1 to 16 and pin 39 of ic 17 to 20
JP4: 2-3   pin2 of ic 1 to 16 and pin 39 of ic 17 to 20
JP5: 2-3   pin2 of ic 1 to 16 and pin 39 of ic 17 to 20
JP6: 2-3   pin2 of ic 1 to 16 and pin 39 of ic 17 to 20
JP7: 2-3   pin2 of ic 22 to 25 and pin 39 ic ic21
JP8: 2-3   pin32 of ic 22 to 25
JP9: 2-3   pin32 of ic 22 to 25
Jumper pos. 1 is +5V

JP1: 1-2   gnd
JP2: 2-3   +5v
Jumper pos. 1 is GND
Jumper pos. 3 is +5V

           pin1 joins
-------------------------------
JP10: 1-2  pin32 of ic 26 to 41

All CROM ROMs are 32M MASK
ALL VROM ROMs are 16M MASK

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