[ekaryotic]

neat. not something i´d hanker for. i saw a 16 core z80 laptop years ago and i often think about it because it can multitask. https://hackaday.com/2019/12/10/laptop-like-its-1979-with-a-...

[nine_k]

I implemented "multitasking" (well, two-tasking) between a BASIC program and native code on a Z80, using a "supervisor" driven by hardware interrupts. There's just so much you can pack in a 4MHz CPU with a 4-bit ALU (yes, not 8-bit). It worked for soft-realtime tasks, but would be a rather weak desktop.

[shrubble]

The follow on to CPM which ran on the Z80 is MPM which is a multitasking OS.