Hey tech talk, long time lurker here. Long story short, I wanted to relive some of my highschool days with xmen vs street fighter and I didnt want to bother with getting the saturn version. I always wanted to start collecting arcade boards, so I decided to go the supergun route. Most purchasable superguns seem to be of varying qualities of homebrew anyway, so why not make my own?
The first draft was made using cadsoft’s free version of Eagle. There is a 100mm board length limit, but since jamma pads 1,2,A,B,27,28,E,F are all ground, I can have the pcb in the middle and connect the grounds to the copper pour. I also wanted this board to be pretty straight forward and simple in design. This board has:
 8pin mini DIN for video out
 RCA audio jacks
 stereo/mono audio switch
 audio attenuation circuit (jasenscustoms design)
 atx 20 pin power port
 DB15 neogeo style controller ports
 pin holes for all the jamma pads
 jamma and multicart (elf/pandora) button support switch
I do want to add fuses to the 5V and 12V lines and possibly add the audio to the 8pin minidin? If and when I get around to doing a new version, I have a list of additional features to tackle
 KiCAD board design, to get full length jamma pcb
 Voltage display and tweaker
 RGB video tuning
 Video encoder for more options for video output?
[*] scan line generator?