How computing hardware works. All the way down to the wires. Assembly language. Flip-flops and gates. ALU, CPU, and all the acronyms. Caches, pipelines, memory hierarchies.
MIPS quick reference sheet: https://www.dropbox.com/s/jw8nmpguiaw0ufo/MIPS%20sheet%201.6.pdf?dl=0
MIPS datapath design: https://www.dropbox.com/s/qs4eq88cf4e5w4z/mips%20datapath.pdf?dl=0