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I have a Metal Slug X (Green cart, appears legit) It crashed on an MVS with unibios with illegal instruction. the checksum failed the first time but i re-read it without rebooting the MVS and it passed. The MVS passes every other cart and the work-ram test doesnt show any errors. Ive cleaned...

Hey guys. This schematic doesn't have any polarization marking for the capacitors. Judging by the picture of the finished product and how I would have made it the +ve side of the capacitor would on the input side and the negative toward the output. However, I have an MV1-FZ here to tidy up...

I was over in Japan the last couple of weeks and managed to snap a few pictures inside of Try amusement tower. For those who don't know it is spread out over several floors, each floor specialising in a different type of game, the 7 and 8th floors are just filled with Candy Cabs. I thought...

Long shot but I picked up a faulty PC10 Dual monitor board a couple of weeks ago along with 6 games for it. Repaired the board (Missing Z80 and few broken traces from physical damage) Decided to put it into a cheap electrocoin I picked up. Built a PC10 -> Jamma loom with a video switcher to...

Hey everyone. I've not tinkered with NeoGeo boards for that long so i'm hoping someone here has come across this issue before and can point me in the right direction and save me some time with this one. It came to me with damage to the capacitors near the JAMMA edge connector. (470uf's x 4)...

As per the title this board is stuck in watchdog, the bios was also fried so i've replaced it with a bios that i know works and it is still in watchdog. Checked continuity from SRAMS to CPU and from bios to CPU and everything seems to check out. Replaced the two main work SRAMS with two from a...

This is probably one for the techie / Neo nerds :) I have an MV1-FT in for repair and noticed that the Z80 is actually a SHARP Z80A. The CPU is factory soldered too so it must have left the factory that way. I was under the impression that only the slower Z80's were used, all the other Neo's...

Never worked on an AES before.. but after booting up this dead AES I get the usual Neo Splash screen then the following... Is it normal for an AES or this is a Unibios?

Does anybody have the pinout for the D0? Or know which pin the trace runs to? This is for an MV1-FS. Managed to get it booting upto Z80 error now. However, The NMI pin on the Z80A is stuck high and the trace runs to a pad under the D0, the board has had battery damage and i dont want to take...

I thought i'd share my latest project with you guys. Any advice about the RGB pots would be appreciated. So today I finally got around to building a supergun. It looks pretty much like every other supergun, except i made a few tweaks here and there to suit myself. At last! I can finally take...

I have a Puzzle Bobble MVS (Obvious boot) has 27c4002 eproms on adapters boards in C3 and C4 and an unlabelled top board. I don't see it on the MVS scans page (in the bootleg or original section) I have an Art of Fighting 2, this looks original (Clear cart) but the prog board has two chips in...