CSCI 1120 Lecture Notes - Lecture 11: Opcode, Machine Code, Readwrite

• School: Dalhousie University
• Department: Computer Science
• Course: CSCI 1120
• Professor: Christian Blouin

Document Summary

Describe how multiplexers and decoders are used to read from registers and write the output. An alu, in its most primitive form, is a collection of sub-circuits which perform operations. Takes either 0, 1, or 2 pieces of data and puts it through to either back to the register or to the. Ram directly: the values which go into an alu are left and right, the registers send information to the left and right lines. Alu can feed into a multiplexer, as they are capable of only doing a certain number of functions. Each operation only has one code: some operations need one memory location, and some need none. Describe the steps of the execution cycle (conversationally. ) Describe how machine code is processed within one execution cycle. Running software runs one execution cycle for each instruction in the software until it ends.