LC-3 Assembly for VS Code

v1.0.0-beta — Full-featured LC-3 assembly language support based on the Yale Patt & Sanjay Patel textbook on the LC-3 ISA, Introduction to Computing System (3e, 2020).

Documentation

For detailed documentation, please refer to the LC-3 Extension Guide.

Download

lc3-assembly-1.0.0-beta.vsix (~263 KB, requires VS Code 1.75+)

Installation

GUI: VS Code → Extensions sidebar → … menu → "Install from VSIX…" → select the file.

Command line:

code --install-extension lc3-assembly-1.0.0-beta.vsix

Features

Syntax highlighting for .asm, .lc3, and .s files
Hover documentation with binary encoding for all instructions, TRAPs, and pseudo-ops
Autocomplete for instructions, registers, labels, pseudo-ops, and TRAP routines
Real-time diagnostics — missing .ORIG/.END, invalid registers, immediate range checks, operand validation, undefined/unused labels
Signature help — inline parameter hints while typing
Go-to-definition and find-all-references for labels
Document outline and breadcrumbs for labels
Code snippets — program template, subroutine, loops, and more

Source & Issues

github.com/abdonmorales/lc3-vscode