I took it two semesters ago with Hilfinger and sadly didn’t have any Microvax in it. You might be thinking of 61C, which deals more with computer architecture.
A dead assembly language sounds like a Hilfinger thing. Taking 61B with him was an experience. He started by asking us to look to our left and to our right. He told us that one of us would not make it to the end of the class, with pride in his voice. He was right about that.
In his defense he would also work very long hours answering emails from students. The night before projects were due he would hang out in his office all night in case people had questions. He'd return submitted code to you with detailed comments about how to write clean, readable code. More so than data structures I learned how to write readable code in that class.