SY85? I can't find them anywhere, so I'm interested in possibly reverse-engineering it, and wonder if anyone could get me a decent jpg/bmp of the board from both sides, and a list of part numbers? I've got the kit to make double-sided PCB's, and *might* be able to produce a batch of 'em with NVRAM chips etc. as kits (or just bare boards and a parts list) if there was any interest, and if I can get enough info on 'em... I saw a mention in an old posting of some other folk looking into a non-volatile board for the '85, but it seems to have sunk without trace

It might even be possible to increase the non-volatile memory size, depends how Yamaha have presented the internal buses on the card connector, I guess?
Thanks,
Dave H.
(The engineer formerly known as Homeless)