Idk if it would be that much of a help because it’s an analog oscilloscope with a crt inside lol. We could definitely view noise on the signal but extremely accurate voltage representation is not its forte. In this case we would just set it to 0.5 volts per division and count each graticule from zero volts upwards.
Awesome! Great workaround. Can this setup utilize the mapped joystick inputs?
If I take the vga output from the Mistercade and run it through a J-Pac into the JAMMA edge it looks great.
I know right. If it can output clean through the VGA then it should be the same from the jamma edge. This is kind of a strange issue. I wonder if this is somehow connected to the dim brightness as well? Was the video dim through VGA? No brightness adjustment necessary?
One is the Mistercade v2, the other is a 4 slot Neo geo board
Awesome both look great
Regarding dim video:
I found a way to increase the brightness. It involves removing 3 (tiny) resistors. It will approximately double the video levels, restoring them to MiSTercade V1's levels.
I've already modified the remaining MiSTercade V2s and will happily perform the mod on units that have already shipped. I'm not sure how to handle International orders.
Unlike consumer RGB video, arcade RGB video levels never had a standard. Most arcade board video voltages range from 2V to 5V. You'll find most Raspberry Pi solutions to have 0.7V video output. I chose 3.3V video levels for MiSTercade V1 because it matched the Neo Geo MV1C arcade board. The MiSTercade V2 units that already shipped have video levels closer to 2V. I wish JAMMA had standardized a video level. It would have made everyone's life much easier.
Regarding MS8-29 ringing:
I was able to reproduce the issue but haven't yet found a solution. I had to reflow all solder joints on my MS8 chassis to see the issue. I have 2 other chassis that were sent out for repair and returned without success. Why are MS8 chassis cursed? Haha. My MS9-29 chassis doesn't exhibit any kind of ringing. Will keep looking into it!
It definitely worked with making a brighter image, thanks
No sadly it didn’t, that’s something else entirely.
It does look less pronounced after the mod.
Can you compare the amplitude of the sync signal between V1, V2, and some standard hardware too?
Just mentioning that if the person has a decent iron and a reasonably small tip, it is very easy to do with Chip Quik or a similar low melt alloy.
Regarding dim video:
I found a way to increase the brightness. It involves removing 3 (tiny) resistors. It will approximately double the video levels, restoring them to MiSTercade V1's levels.
I've already modified the remaining MiSTercade V2s and will happily perform the mod on units that have already shipped. I'm not sure how to handle International orders.
Unlike consumer RGB video, arcade RGB video levels never had a standard. Most arcade board video voltages range from 2V to 5V. You'll find most Raspberry Pi solutions to have 0.7V video output. I chose 3.3V video levels for MiSTercade V1 because it matched the Neo Geo MV1C arcade board. The MiSTercade V2 units that already shipped have video levels closer to 2V. I wish JAMMA had standardized a video level. It would have made everyone's life much easier.
Regarding MS8-29 ringing:
I was able to reproduce the issue but haven't yet found a solution. I had to reflow all solder joints on my MS8 chassis to see the issue. I have 2 other chassis that were sent out for repair and returned without success. Why are MS8 chassis cursed? Haha. My MS9-29 chassis doesn't exhibit any kind of ringing. Will keep looking into it!
