Ah yes that screenshot with the KCS logo looks familiar and the board layout is pretty much identical.

Thank you very much for your help

First post here so Hello, nice to meet you all. Today I cleared some things out of my parents loft, and found my old C64 disk drive and a red cartridge which I seem to remember being a reset cartridge that allowed you to program in assembler (this may be me mis-remembering) ...it has a handwritten s...