World Rally 2: Twin Racing (MASK ROM version)

EMU Infos

dumper	f205v
dump date	17/01/2009
emulator
dev

PCB Infos

name	761
description	World Rally 2: Twin Racing (different EPROMs)
year	1995
manufacturer	Gaelco

Technical references

CPUs

QTY	Type	clock	position	function
1x	MC68000P12		u48	16/32-bit Microprocessor - main
1x	custom GAE1-449		u57	main
1x	DS5002FP		u47	Secure Microprocessor Chip
1x	oscillator	26.000MHz	xtal1
1x	oscillator	34.000MHz	xtal2

ROMs

QTY	Type	position	status
2x	NM27C040Q	62,63	dumped
1x	MASKROM 1Mx8	68	dumped
2x	MASKROM 1Mx16	69,70	dumped, maybe bad dump

RAMs

QTY	Type	position
4x	KM428C256J	53,54,55,56
2x	HM3-65764E	32,33
2x	CY7C199-20	75,76
2x	HM3-65756H	49,50
1x	MB84256A	34

PLDs

QTY	Type	position	status
1x	TI F20L8-25CNT	39	read protected
1x	TI F16R8-15CN	27	read protected
1x	TI F16L8-25CN	30	read protected

Others

1x JAMMA edge connector
1x 6 legs connector (conn1)
1x 15 legs connector (conn2)
1x 4 legs connector (conn4)
2x trimmer (volume)(p1,p2)
1x battery 3V

Notes

This is the same PCB revision (950510-1) as already documented in MAME source gaelco2.c, but with a number of differences:
1) Gaelco custom chip is 449 instead of 506
2) total EPROMs size is less than in revision 950510 (more specifically it looks like the content of 09,10,16,17 is missing)
The PCB is totally dead, therefore I can not make any screen comparison.

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update 20180130:
Comment from Haze: "it's very obviously missing 2MB total rom data, so something isn't dumped at the right size. (there are no empty positions, so it's clearly a 'wrong size' error)"
Comment from Brian Troha: "So if it’s missing 2MB of data, one of the mask roms IC70 or IC69 is dumped at half size."
Comment form me: "Unfortunately this PCB was bartered for something else a long time ago, it's no more available."

Files

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  PCB component side

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  PCB solder side

• 

  Read me

• ROMs

  ROMs

761