Hi pckid,

I have made my own "rudimentary" development carts for both systems since there is still no flash cart available for the public.

It is quite easy to do, you only have to desolder the MASK-ROM chips and replace them with EPROM chips. Because you need to swap
out the EPROMs quite often (if you have new code to test) it is recommendable to solder chip sockets or "pin receptacles" to the PCBs.
I have used the PCBs of Samurai Showdown 1 (PROGGSC board / CHA42G board) for both systems. I will post more details and some
photos in a separate thread in a few days.