mv1b

My MV1B has one of the NEO-BUF bypass "patches" on the slot PCB, (the one on the main PCB is still present). According to https://wiki.neogeodev.org/index.php?title=NEO-BUF bypassing one/both of these, (it doesn't state which and sort of implies there's only one, when there's actually two), can...

I recently built some of @ack's excellent Neo Geo diagnostic PCBs just as a useful thing to keep handy. Testing them out on my MV1B I wasn't expecting to have any issues. However the first time I tried them with the latest v0.19a02 diagnostic BIOS, I got a VRAM 32K error on power up which I...

Just received my MVS bought from good ol' Aliexpress! Not sure what I was expecting, but there was a few things notable about it. 1) The outer ABS plastic shell was scratched to hell and back. I removed it and scrubbed it down with soap, a toothbrush and melamine sponge to see if some of that...

I recently got an MVS and supergun setup and it worked perfectly for a few days, but one morning it started having this issue and it hasn't worked properly ever since. Regardless of how I have the hard dips set, the console will briefly display "WORK RAM TEST" as if all the switches are enabled...

Hello everyone, Question level beginner. I got a mv1b and I installed a battery holder on it, but saves are not working. I just took off the old battery and installed the holder, I didn't not remove anything I would like to use it with ml2032 not cr2032. I tested the electric tension on the...

Until recently my MV1B still had the original rechargeable battery. It looked a bit grotty but hadn't leaked however it wouldn't keep a charge for very long so I figured I should replace it pronto. I bought a Dreamcast battery kit as it looked like the correct lead layout but it was only when I...