So I'm working on a 130XE for someone, for way too long now actually, and I have installed a rapidus and a U1MB into the machine. It took some additional troubleshooting to make it work, but the last problem I can't seem to get rid of is that some cartridges don't load.
Basically, rapidus freezes while loading the FPGA core. The loading bar never fills.
I've got it narrowed down to 16K cartridges, and I've actually narrowed down that it has nothing to do with the cartridge itself, but th