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 http://guru.mameworld.info/wip/DSCN0726.JPG http://guru.mameworld.info/wip/DSCN0711.JPG http://guru.mameworld.info/wip/DSCN0713.JPG http://guru.mameworld.info/wip/DSCN0714.JPG http://guru.mameworld.info/wip/DSCN0715.JPG http://guru.mameworld.info/wip/DSCN0716.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 http://guru.mameworld.info/wip/merit2.jpg http://guru.mameworld.info/wip/merit3.jpg http://guru.mameworld.info/wip/merit4.jpg http://guru.mameworld.info/wip/merit5.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. ______________________________________________________________________________ 來源：http://guru.mameworld.info/ --

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