A CPU keeps the values it is working on in a small set of fast registers. An instruction such as ADD R1, R2 reads two of them and writes one back, all in a single clock. The hardware that does this is ...

In Tutorial 26 the program was already in RAM when the core came out of reset: the testbench put it there with $readmemh. A real board has no testbench. Its RAM holds ...

Update [Mon 19th Oct 2026, 9am]: You know the week cannot begin until techhead Taki Udon has been distracted by one of many side-projects. In this week's episode, the RetroRemake founder is still ...