Found this guy in the cellar, dropped him off outside.

First test print - top is an original cartridge, bottom is a 3D print. Fits the original PCB perfectly, though I still need to tweak some tolerances a bit. Also a suitable new PCB for 32kB EPROMs. It uses diode-logic that is popular in C64 cartridges as well to save using an 74ls08.

Inspired by @pointerfunction.bsky.social 's work this is my attempt to model a #spectravideo #svi3x8 cartridge in #fusion360. Some internal features are still missing, and I have to work out how to make a more complicated design at the back.