[riffraff]

I had a class (in the late 90s/00s) where we had to code to a theoretical RISCish CPU, but the teacher had built a simulator for it which allowed you to inspect registries, flags, execute instructions step by step etc

It was quite entertaining.

[marco_craveiro]

Same here. We used LMC [1] before we moved to a real architecture.

[1] https://en.wikipedia.org/wiki/Little_Man_Computer