> What about parallelization If you mean multi-core, I guess you could do memory-mapped registers to control additional cores from the first one? In its simple

> What about parallelization If you mean multi-core, I guess you could do memory-mapped registers to control additional cores from the first one? In its simplest form, you write an address (reset vector) into a predetermined memory location, and that core starts executing from that address. IIRC real multi-core CPUs work something like that. If you mean multitasking on a single core, you should definitely be able to implement the cooperative kind. Preemptive multitasking requires timer interrupts.