I set up this retro coding website after rediscovering a number of older computers that I'd worked on in the 1980s and 1990s, and needing a place to bring together my efforts to resurrect the machines themselves and my lapsed coding skills.
This website contains details of the various bits of hardware I've collected over the years, including classic computers from the 19980s and 1990s from BBC, Sinclair, Psion, Sharp, Casio and others.
I've always enjoyed using computers that have a complete, built-in coding environment and have developed games and other programs across a number of diverse retro coding platforms, mainly using variations of BASIC but also Pascal and a bit of Assembler.
Heads up for anyone that needs it, the full PDF is here: https://www.manualslib.com/download/3387750/Epson-P-40.html and that includes the pinout for serial and parallel