Changes
SymbOS
,A stack is not a prerequisite for multitasking. For example take a look at IBMs MVS XESA (late 80ies, beginning 90ies). The used CPUs emulated a stack by software!
== Technical background ==
The Z80 8-bit CPU is able to run a pre-emptive multitasking environment. The MP/M operating system already proved, that multitasking on Z80 computers is possible.
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