The serial port on my #WindowsCE Cassiopeia A-21 seems to be shared in common with some other devices from some other manufacturers, just going by ebay photos. I wish it had a standard name that I could look up and somehow get a cable for...
@indigoparadox@mastodon.social it almost certainly does, keep digging. Palm stuff is like that, weird connectors with obscure and borderline useless names, like the "Palm Universal" connector..
@purple I wanna say "the Palm connectors are extremely well-known! Everybody knows about the Athena connector! The Palm III serial connector is basically a standard!"
But then I realize they all got wiped off the Internet when Palm went out of business and all the little Palm sites and forums folded. So maybe there's a similar situation here w/ MS burying the docs, but the Windows CE devices were always different manufacturers, so it's hard to say for sure. 
@indigoparadox@mastodon.social the palm info is very easy for me to find, it's on at least three independent wikis including the important one. keep digging, maybe try https://search.marginalia.nu/
@indigoparadox@mastodon.social or archive.org directly. they have all sorts of technical documentation that doesn't index nicely on broader search engines.
@purple Apparently this connector has no name, but also #DuckDuckGo doesn't index pinouts.ru. I found the pinout, at least: https://old.pinouts.ru/PortableDevices/cassiopeia_a10_pinout.shtml
The list of other models gives a list of great search terms if you wanna find PDAs on ebay with no cables... apparently the cable is really rare!
Too bad the shape is so weird! I doubt it's something I can reproduce on my 3D printer... maybe if I get desperate enough!
Might be worth investigating the IrDA angle, first...