Rally X (bootleg)

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EMU Infos
dumper f205v
date 01/06/2020
PCB Infos
name 1703
description Rally X (bootleg)
year 1980


Technical references


QTY Type clock position function
1x D780C-1 2b main PCB 8-bit Microprocessor - main
1x LM741CN - 12e sound PCB Operational Amplifier - sound
1x oscillator 18.432MHz 4r main PCB


QTY Type position status
8x I2716 1.1b 2.1c 3.1e 4.1f 5.1h 6.1j 7.1k 8.1l main PCB dumped
2x I2716 1.8d 2.8e sound PCB dumped
1x unknown DIP28-600mil 2d main PCB empty socket, missing chip
3x unknown DIP16-300mil 2m 3p 4n main PCB empty sockets, missing chips
4x unknown DIP16-300mil 7k 8m 8p 11n sound PCB empty sockets, missing chips


QTY Type position
2x SN7489N main PCB 2n 2p
12x uPD2114LC-5 main PCB 6a 6b 6c 6d 6e 6f 6h 6j 6k 6l 6m 6n
1x SN7489N sound PCB 8k
6x MB8147E sound PCB 9b 9c 9d 9e 9j 9k


QTY Type position status


1x 18x2 edge connector (sound PCB)
1x 8 legs connector (sound PCB 12h)
6x 12 pins flat cable connector from main PCB to sound PCB
1x trimmer (volume)(sound PCB 11c)
1x 8 DIP switches bank (sound PCB 11e)
1x 4 DIP switches bank (main PCB 4a)


main PCB is marked: "PHANTOM-80" on component side
sound PCB is marked: "PHANTOM-80" on component side
sound PCB is marked: "SOLDER-SIDE" on solder side
sound PCB is labelled: "F 1659" on component side

4x of the missing PROMs where checked and dumped by Joe Magiera, and they match a standard Namco Rally X romset. I think it is safe to assume that also the other missing PROMs would match.

There are 2 EPROMs different from "rallyxa" in MAME.
2.8e on sound PCB is the GFX ROM that removes "NAMCO" name from screen.
6.1j on main PCB is a CPU ROM; in the current MAME driver it gets stuck at initial boot-up sequence with an error "ROM 3" flashing on screen. I have dumped this EPROM multiple times with different Volt and Amperage settings and always get the same result, so I consider unlikely a bad dump.

update 20200607: from OSSO: EPROM 6.1j has only one bit difference from standard, and that variation makes no sense at all. It is 99,99% a problem of bit rot. Therefore I'll flag it a "bad dump".



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