[Aug/15/2001]

Rad Rally
(C) Sega 1991

Rad Rally runs on Sega System 32 hardware.

Main PCB

Number: 837-7428-01
CPU: NEC D70616R-16 (V60)
SND: Z80, YM3438 x 2, 
OSC: 32.2159MHz, 50.000MHz
RAM: MB84256 x 4, MB8464 x 5, HM53461 x 16, D41264 x 8
DIP: 4 Position 
PAL: 315-5441 (read protected, not dumped)
OTHER: Battery - 3V Lithium, Battery - NEC 5.5V, 
       Push Buttons for service and test modes.  

Sega custom chips
-----------------
315-5296
315-5476
315-5385
315-5386A
315-5242
315-5388
315-5387


Middle PCB (Communication PCB)

PCB Number: 837-7882
CPU: Z80
OSC: 48.000MHz
RAM: MB8464 x 1
ROM: EPR14084.17
PAL: 315-5507 (Read protected, not dumped)
Other: MB8421-12, MB89374, MB89237A
Jumpers: JP1: 1-2
	 JP2: 1-2
	 JP3: 1-2


Top ROM PCB

PCB Number: 837-7429-01
Jumpers:
JP1: 2-3
JP2: 2-3
JP3: 2-3
JP4: 1-2
JP5: 2-3
JP6: 2-3
JP7: 1-2
JP8: 2-3
JP9: 2-3
JP10: 1-2
JP11: 1-2
JP12: 1-2
JP13: 1-2
JP14: 2-3
JP15: 2-3
JP16: 2-3
JP17: 1-2
JP18: 2-3
JP19: 1-2
JP20: 2-3
JP21: 1-2
JP22: 1-2
JP23: 2-3
JP24: 1-2
JP25: 2-3
JP26: 1-2
JP27: 1-2
JP28: 1-2
JP29: 1-2
JP30: 2-3
JP31: 1-2
JP32: 1-2

PAL: 315-5442 (Read protected, not dumped)

ROMS:  (filename extension is IC number on PCB)

Name		PCB label	Type
-----------------------------------------------------
MPR13511.36	OBJ00		838000,?, read as MB838000
MPR13512.32	OBJ01		838000,?, read as MB838000
MPR13513.27	OBJ02		838000,?, read as MB838000
MPR13514.23	OBJ03		838000,?, read as MB838000
MPR13515.37	OBJ04		?, read as MB838000
MPR13516.33	OBJ05		?, read as MB838000
MPR13517.28	OBJ06		?, read as MB838000
MPR13518.24	OBJ07		?, read as MB838000
EPR14102.38	SCL00		AM27C020
EPR14103.34	SCL01		AM27C020
EPR14104.29	SCL02		AM27C020
EPR14105.25	SCL03		AM27C020
EPR14241.06	CPUP1		TC57H1025AD
Socket CPUP0 (IC13) is unpopulated
EPR14106.14	CPUD0		D27C4001	
EPR14107.07	CPUD1		D27C4001
EPR14108.35	SND0		AM27C100
EPR14109.31	SND1		D27C4001
EPR14110.26	SND2		D27C4001
EPR14237.22	SND3		D27C4001


NOTE! the 838000 ROMs may actually only be 4M ones. ROMREF.TXT says 838000 are 1M x 8 (42 pin)
but these are clearly labelled as 838000, but they are 32 pin !


-

