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by lproven 154 days ago
I ran it in 1MB. :-)

And it was fast and responsive, too.

Soon afterwards I bought a Psion 3 which ran a multitasking GUI OS on an 8086 in 256 kB of RAM.

That space was shared with file storage in a RAMdisc.

https://phonedb.net/index.php?m=device&id=826&c=psion_series...

It was perfectly viable to have multiple apps open and flip between them. It ran for weeks on a pair of AA batteries.