I did take a computer architecture class but all there was addressing modes and few basic instruction classes. Things got difficult when I started studying OS.

I did take a computer architecture class but all there was addressing modes and few basic instruction classes. Things got difficult when I started studying OS. Then I came to know that sopport for things like page table, higher privilege level instructions etc are all in Architecture itself (Though I still have to read about them from manual). I don't know what else am I missing.