1. Understanding the Terminology

Before diving in, let’s break down the key terms:

• Example: mame2003-plus-reference-full-nonmerged (search on torrent aggregators – use at your own risk).

Full non-merged ROMSets are the most desirable type of ROMSet for MAME users. They offer several advantages:

This article will dissect every component of that keyword. We will explain what MAME 2003 Plus is, why the “Reference Link” matters, and why you specifically want a Full Non-Merged set for your build.

File Types

• ROMs (.bin/.rom/.sm1 etc) — raw dumps used by the emulated hardware.
• CHD (.chd) — compressed hard-disk optical media images for larger arcade titles.
• Samples (.wav in zipped sample sets) — audio samples referenced by some drivers.
• BIOS/Device files — e.g., neogeo.zip for Neo Geo system BIOS and AES/MVS bios variants.