What fun!
I’d love to also go the opposite direction, a full-sized laptop with an ESP32 running tiny386 and Windows 95 ^_^
https://www.hackster.io/news/he-chunhui-s-tiny386-turns-the-...
diy 486 schematics (around year 2000)[0]. no longer available. Discription/overview[3]. :( But, current linux doesn't support 486 cpus.
Was turned into something commerical (?2002[2])[1]. Perhaps modern version would be the old AMD cyrix chips?
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[0] : http://boole.stanford.edu/cebit/
[1] : https://megagames.com/news/matchbox-pc-smallest-world
[2] : https://ptacts.uspto.gov/ptacts/public-informations/petition...
[3] : https://www.paloaltoonline.com/morgue/monthly/1999_May_26.MI...
This could be great if the rest of the chassis was filled with batteries.