Peer review Simon Lundqvist

Your code looks good; however, it doesn’t compile correctly. The reason is because you need a nop after the first instruction in proc1: lb t0, 0(gp). You don’t have enough time to write gp to t0, and when you move t0 to a0 it will be empty. That’s why you don’t get the first “A” printed—just a square. It works when I try it on my computer. Other than that, the code looks good: you use k0, k1 in kernel mode, and the code is well commented.

Summary: just implement a nop after the first instruction in proc1.