[新聞] (WIP) MAME Guru bews
2011.06.22
Some time ago I got a call from the Supermodel devs asking for info on
the Model 3 drive board. After seeing the nice work done recently it
inspired me to get my hands dirty and pull my machine out to check the
info exactly. I really didn't want to get behind there, mostly because
the cab is so heavy and a pig to move. After some time grunting and
groaning I was able to move it about 1 foot only. Then I had to crawl
under my pinball machine and take pics while lying on the floor. While
I was checking it out I realised I had a spare drive board (the lower
one) just lying around. It's missing one chip (OKI M6253) which is also
used on Model 1 and Model 2 vanilla I/O boards (it was taken to repair
a Daytona USA I/O board) but the board is fine for documentation purposes
so I got a HQ shot of it outside in sunlight. I dumped the ROMs too, of
course! The one in my Rally 2 is EPR-20512 and the one on my spare board
is EPR-19338a (probably from Scud Race). The PAL has number 315-6030 on
it. I'm sure Daytona USA 2 uses a different PAL as the steering handling
is different to Rally 2 so it's definitely not from a Daytona USA 2
machine. The top board contains a Mitsubishi M37704 MCU, transistors
and other power-related stuff.
http://guru.mameworld.info/wip/DSCN0712.JPG
In other news I also received a Falcon Kong Junior PCB thanks to Tingoes
http://guru.mameworld.info/wip/kongjr_pcb.jpg
Today I worked on an epoxy block for a Merit Industries Trivia game. I
can't remember the full name or what it is exactly but I know the year
is 1986 and the game has 'Trivia' in the name. Here's some pics of the
block in various stages.....
http://guru.mameworld.info/wip/merit1.jpg
The block contains a Z80B at 6MHz, 2816 EEPROM, 74LS245 logic chip and
another chip marked SC3539.
The EEPROM dump contains some data which mostly looks like random numbers
or garbage. The chip could also be blown-up and the dump is bad. Either
way there's nothing more I can do with this.
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來源：http://guru.mameworld.info/
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