CSE2021

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====== Assembly Language ======

This lecture covers Program Execution (a closer look at DRAM, the CPU, and the fetch-execute cycle) and introduces assembly language. The SPIM simulator is used to demonstrate writing and running programs for the MIPS family of processors.


===== Outline =====

  * Played Jeopardy on DRep and the Foundation
  * Review of the Fetch Execute cycle -- LMC
  * A model for DRAM
  * Representing program and data in DRAM
  * A model for the CPU
  * Assembly Language Programming
  * MIPS programming

===== Big Ideas =====

  * Memory Blocks
  * All types are represented as numbers
  * CPU = Registers + Datapaths + Control + BIU
  * The more registers the better. "Better" means //easier// to program (the 1-reg LMC can do anything the 32-reg MIPS can).
  * Programming in assembly language


===== Slides from Lecture =====

  * [[http://www.cse.yorku.ca/~roumani/course/2021/progExecution.pdf|Program Execution]]
  * [[http://www.herts.ac.uk/ltdu/projects/mm5|LMC]] demo from the University of Herfordshire, UK
  * [[http://www.acs.ilstu.edu/faculty/javila/lmc|Applet]] that simulates the LMC from Illinois State University, USA





===== To Do =====

  * Complete the Drep homework __this__ week.
  * Read Chapter 2 of our textbook up to, and including, Section 2.8 but skip Section 2.4. //(If you have the old edition of the textbook, read Ch 3 up to and including, Sec 3.7 but skip Sec 3.4.)//
  * Download SPIM to your home machine and/or use the one in Prism.
  * Complete the programs developed in class (see the //Resources// page).
  * Start reading and performing the tasks of Lab-A. //Optional//