The Howdy Glossary

The question is ambiguous because STELLA can have different meanings, but I'm going to assume you're asking about Stella. Sorry if I'm wrong.

Stella is an emulator for the Atari 2600 gaming console designed to make it easy to play these classic games on a modern computer platform. The app helps users experience retro games without needing original hardware by simulating the 2600's internal components like the MOS Technology 6502 microprocessor and TIA graphics chip. The software is written in C++, using cross-platform libraries such as SDL or OpenGL for scaling and sound output. It supports various game file formats, including ROM images and binary files containing both executable code and graphic data. Additionally, Stella offers tools for developers who need detailed debugging features or performance analysis when creating new homebrew titles or emulating older systems.