Not everyone's cup of tea, but was happy to pick up a TI-85 calculator for peanuts. For the unaware this is a Z-80 based programmable machine with bigger software library than some early 1980s 8-bits (Think like Jupiter Ace, Mattel Aquarius and the other also rans.) Later versions also have a "Doom" port, quoted because unsure how faithful. Anyhoo this is the one that started off that line of "computer in a pocket calc" and the one I envied when I was plugging away on my Casio FX-6500 with under half a kb of RAM trying to cram anything more than simple blackjack etc into it. I got that one at a liquidator in the late 80s for a tenth of the price of a Ti, which my student budget could get nowhere near. The import markup on that was bad enough that I could have got a "real" computer for about the same money. Got a later model put away somewhere, combined alphanumerics don't stick in my head very well so can't remember which it is. I've had a Ti-85 manual for ages, but couldn't get very far with it, with that as a ref, so didn't get too much into it. I try working from a PDF on a tablet or something and 30 mins in I'm browsing something unrelated, derp. TI-83+ sounds right to me at the moment, but IDK.
Also still have the Casio original around, and a super duper later Casio with more competitive to TI features (9860 series?? ) . Then a Sharp PC-1403 pocket computer and a Tandy PC-7 so you'd think I was collecting them or something. At least they are small. I think the appeal is that you can maybe completely "know" a limited machine and push it into "holy crap I didn't know you could do that with it" territory.
Well whatevs, the z-machine interpreter might distract me for a while, until I'm all zorked out etc. Then I might figure if it's worth using it as a terminal for a CP/M or textmode DOS emulator on an ARM board or something.
Unicorn herding operations are proceeding, but all the totes of hens teeth and barrels of rocking horse poop give them plenty of hiding spots.