[alanjay]

If you look at how these machines were programmed, rather than used, you'll learn a lot

[jarbus]

Any resources you’d recommend?

[TillE]

Ben Eater's 8-bit projects are the easiest place to start if you don't already deeply understand how such computers work. He starts with the hardware and eventually builds up to writing non-trival assembly for it.

https://www.youtube.com/watch?v=LnzuMJLZRdU&list=PLowKtXNTBy...