A home-made scanner using a Sinwa CP80 DM printer (Score 1)

I had a desperate urge to scan stuff in about 1988. I glued a hyper-bright red LED (illumination) and a 1mm plastic flexible light guide (detector) into an old printer ribbon case. The light-guide went into an IR diode connected to a single Op-amp schmitt trigger lash-up on breadboard. The output connected to the Ring-In pin on the serial port of my Atari ST. I wrote my first ever bit of 68000 assembler (Mmm. All those addressing modes!)to get the printer to micro-step along each line, reading state of RI before doing a micro form-feed. It worked first time and I treasure the awful low-res scans that were the result of like 50 hours work.