If your objective is to get a gentile introduction to assembly, with no practical use: PDP-11 (on a simulator) or Motorola 68K. Both are very simple and straig

If your objective is to get a gentile introduction to assembly, with no practical use: PDP-11 (on a simulator) or Motorola 68K. Both are very simple and straight forward. As opposed to many others that seem to live on confusion. To aid in learning, you can always write in C and then output in assembly. Typically you would turn off optimization. The optimizer will often scramble the results to make it better but harder to read. Have you thought about the class NAND to Tetris? It builds a tetris game but starts and the gate level.