JAMMA connectors are card edge slots that were common in arcade games before cheap SBCs. They are designed for fairly high current (5A) and are robust and cheap in a range of sizes from 8 to 72 pin.
I can't find a KiCAD footprint for any size of JAMMA connector. This doesn't surprise me, but I also can't find a comprehensive physical specification.
I know there is 3.96mm centre to centre for the pins, and 3.96mm between the rows. They use a flat pin with a hole designed for attaching a heavy wire, with an interstitial gap of 1.8mm. This implies a pin width of 2.16mm requiring a 2.2mm hole and a pad at least 2.5mm wide leaving 1.46mm pad edge to pad edge.
However, JAMMA connectors come in two flavours, the other one having wire pins. The diameter of the wire pins I do not know, and Chinese suppliers have not responded with diagrams. Centre to centre they have to be 3.96mm same as the flat pins with the holes. At a guess the pin diameter is about 1mm but it's hard to be certain until I receive them and use calipers.
I've never created a KiCAD component and it looks like a fair bit of work to do a good job of it. Any information, guidance, encouragement or assistance with KicAD would be appreciated, with the outcome being contributed to the KiCAD libraries.
In particular, can board makers do slots? It crossed my mind you could do a series of 13 0.9mm holes at 0.305mm intervals but I don't know how well the drilling machine would cope.
Even can it be done, slots may not be worth the bother. There isn't a lot of room for the heavy tracks associated with these big pins to escape between the pads (gap of 1.4mm) so I'm going to have to make heavy use of vias and layers anyway.