gloriouscow21h ago

KiCad is pretty useful for documenting pinouts, even if no actual circuitry is involved.

Here I have documented how the Warp Speed light pen for the IBM PC is connected, and how I wired up the Tandy 1000 adapter for it. Also the PCjr light pen header, because why not.

I'll just export this to PDF and include it with everything when I upload it to archive.org.

#retrocomputing

Show threadgloriouscow21h ago
The adapter is pretty simple to make. You just need an inexpensive de9 breakout with screw terminals, some solid core ethernet cable, and a ethernet keystone jack. No soldering required!
Show threadARGVMI~1.PIF

@gloriouscow

A light pen that connects to the computer using…RS232 signaling over a phone jack? Whose idea was this???

Mar 29 at 1:11amWeb
Show threadgloriouscow19h ago

@argv_minus_one

It has nothing to do with RS232 whatsoever. It's just a DE-9 connector