C64 BASIC: Game Map Overhead “Camera View”
Summary
This post explains how to implement an Ultima-style overhead camera in a C64 BASIC game, detailing the world-vs-viewport concept and step-by-step optimisations. It covers naive rendering, then LUTs, 1D maps, and loop unrolling, with code samples and an online editor. A practical read for retro game dev and for teaching viewport techniques in constrained environments.