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Hi, I've been using my SFII' board for a long time, and suddenly, now the board shows vertical lines on sprites and on other items (like the health bar). I discard a broken trace or anything similar because I haven't manipulated the board for a long time. Also, I have a working SFII board...

I have an original MV1B that when booting some specific games, it shows the following message: MVS SLOT CHECK VER2.20 99/11/01 M1-ROM ERROR This is the error I get with my original Metal Slug 3. The exact same message appers on MS3 when using the multicart 161 in 1. After this message, the...

I have a board that doesn't output audio. Well that's not strictly true, because in some games I still hear very specific sounds, like in metal slug, when I grab a jewel or apple, I hear the sound. I have concentrated on chip YM3016D, the DAC. https://wiki.neogeodev.org/index.php?title=YM3016...

I have an eprom programmer that is able to check SRAMs, and to do so I need an adapter from sop28 to dip28 something like this...

I have a board (mv1A) that is playing fine all my originals carts (MS, MS2, MSX, Shock troopers, Neo turf masters) but this board has a problem with also original MS3 and the multicart 161. With MS3 it boots nice, but when it gets to the main screen I get the following screen, and then after 5...

Hi, my mv1a is not saving hiscores or unibios options. I have encountered this problem before in other boards and was able to solve it either fixing a broken trace or replacing a component. But this time I think I have covered everything and still not working. I've done the basics, like...

I have a mv1a board, and i have removed D1, D2 and R10, so that I can use a CR2032 no rechargeable battery. As per the image here http://www.jamma-nation-x.com/jammax/images/tuts/mv1ax-charge.jpg But when i turn on the board, the positive of the socket gets around 3.3 V (without any battery...

Just curious, because I've never used these pcbs (the one with the THS7374) and the image is still really good on a CRT TV. Is the image improvement (with the board) worth it?

I have 2 mv1f bases working perfectly (image and sound) with my mvs carts. But when I try to play a 161in1 cartridge, there is no sound. Strangely, when playing this same 161in1 cart in a mv1c base, sound is fine. Any idea what is going on?

I hace currently a CMVS connected to my CRT TV, using the scart connection. The RGBS lines that I feed the TV are: R/G/B: pins 12/N/13 of the jamma, through a 220 ohms resistor to the scart connector Sync: pin P of the jamma, through a 470 ohm resistor to the scart connector. That way the...

My idea is to make all the connections (except power supply) from the back of the board (using this thread http://www.neo-geo.com/forums/showthread.php?236267-Info-Consolized-MV1FZ-RGB-and-Controller-points-on-the-bottom-of-the-board/page3&highlight=wiring+mv1fz) but haven't found a spot on the...

I made the battery mod on a MV1C board that I purchased recently, and realise that everytime I turn on the board, no data is store (highscores, unibios config, etc ...) I did not check how the board was doing presiously with the old stock rechargeable battery. I use a brand new CR2032 (3,2 V)...