The NEW Build Your Own Arcade Controls
Main => Monitor/Video Forum => Topic started by: DalyTek on July 10, 2021, 12:17:35 pm
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Hi all. I'm going to do my best to describe my problem, but I am relatively new to this, so please bear with me.
I built a cabinet from scratch, with the sole intent of making a dedicated Super Mario Bros. machine. At first, I used a 19-in-one JAMMA board, paired with a CGA-to-VGA converter, and had all the other games disabled so it booted directly into SMB. This worked, but the game was emulated in this board and I didn't like the performance. I wanted the real deal. So I bought a tested good Vs. Unisystem Super Mario Bros. board, and I bought a Vs. to JAMMA converter board from pcbjunkie.net. These are still running into the above mentioned CGA-to-VGA converter into a 19" LCD screen.
I am having troubles with the video on this setup. It's just a garbled mess. The system board, the Vs. to JAMMA board, and the video converter board all have their own respective RGB trim pots on them. I spent all day yesterday trying various combinations of tweaking these. I was able to get the display to show, but not clearly, and there is a noticeable green overtone to everything and the video seems to intermittently cut out. if it matters, the settings for the pots that so far show the display the clearest are: CGA-VGA converter: RP1:all the way left, RP2 & RP3: 1bout 1/3 up; JAMMA converter: all 3 all the way to the right; Nintendo Vs. board: all about middle (but these 3 don't have a pronounced effect at all.)
I am attaching a pic of the screen as best I can get it, showing the graphical glitches.
Does anyone have any advice on what I can do to get this up and running correctly? Greatly appreciate any and all advice!
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Original Nintendo boards output an inverted video signal. Your JAMMA board outputs standard arcade video signals.
You need to buy a video inverter board such as this one from Mike's Arcade:
https://www.mikesarcade.com/cgi-bin/store.pl?sku=NININVAMP
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Original Nintendo boards output an inverted video signal. Your JAMMA board outputs standard arcade video signals.
You need to buy a video inverter board such as this one from Mike's Arcade:
https://www.mikesarcade.com/cgi-bin/store.pl?sku=NININVAMP
I believe that my JAMMA adapter has this same circuitry built into it.
This is what I have:
http://pcbjunkie.net/index.php/jamma-adapters/nintendo-vs-to-jamma-adapter/