What This Document Is
This document provides detailed instructions and explanations related to data movement and control within the LC-3 Instruction Set Architecture (ISA), a foundational concept in introductory computing systems. It’s designed as a lecture accompaniment for ECE 190 at the University of Illinois at Urbana-Champaign, offering a deep dive into how data is manipulated and processed at a low level. The material builds upon previous lectures and prepares students for more advanced topics in computer organization.
Why This Document Matters
This resource is essential for students enrolled in an introductory computing systems course who are seeking a comprehensive understanding of assembly language programming and computer architecture. It’s particularly helpful when working through machine problems and homework assignments that require direct application of LC-3 instructions. Students will benefit from reviewing this material when preparing to write and debug programs at the instruction level, and when analyzing the interaction between software and hardware.
Topics Covered
* LC-3 Data Movement Instructions (Load & Store)
* Addressing Modes for Memory Access
* LC-3 Control Instructions
* Data Path Review related to instruction execution
* PC-Relative Addressing
* Base + Offset Addressing
* Immediate Addressing
* Instruction Encoding Formats
What This Document Provides
* A thorough overview of various LC-3 instructions designed for moving data between memory and registers.
* Detailed explanations of different addressing modes used to calculate memory addresses.
* Illustrative breakdowns of instruction encoding, revealing the structure of LC-3 machine code.
* Connections between instruction execution and the underlying data path within the LC-3 architecture.
* Information regarding important course deadlines for homework and machine projects.
