Emux NES on RetroArch: Source-Based Core Guide

The Emux NES core is a libretro core for the Nintendo Entertainment System (NES) / Famicom, used within RetroArch. This guide summarizes the officially documented details of the core: its background, the content it loads, the RetroArch database it is associated with, its supported frontend features, and its controller mapping. It reflects the official documentation only and has not been hands-on tested for this article.

Core background and licensing

Emux is described as a cross-platform emulator project that aims to emulate multiple kinds of gaming-related machines, such as consoles or arcades. Its design philosophy is inspired by the Linux kernel, keeping CPU and controller code separate from machine-specific code.

• - Author of the Emux NES core: Sebastien Ronsse
• - License: GPLv2

Supported content extensions

Content loaded by the Emux NES core uses the following file extensions: .nes, .bin, and .rom. Content in these formats is what the core is documented to accept.

Associated RetroArch database

The Emux NES core is associated with the Nintendo - Nintendo Entertainment System database in RetroArch. The core's internal core name is 'emux (nes)'.

Documented feature support

The official page lists which frontend-level settings and features the Emux NES core respects. Restart, Screenshots, and Controls are marked as supported. Saves, States, Rewind, Netplay, Core Options, Memory Monitoring (achievements), RetroArch Cheats, Native Cheats, Remapping, Multi-Mouse, Rumble, Sensors, Camera, Location, Subsystem, Softpatching, Disk Control, Username, Language, Crop Overscan, and LEDs are all marked as not supported.

Controller support and default input

The Emux NES core supports three device types for users 1 and 2 in the controls menu: None, RetroPad, and RetroPad w/Analog. The documentation states that None does not disable input, and that RetroPad w/Analog behaves the same as RetroPad. RetroPad (Joypad) is the bolded default for the specified users.

• - RetroPad B maps to the core's B input
• - RetroPad Select maps to Select
• - RetroPad Start maps to Start
• - RetroPad D-Pad Up, Down, Left, and Right map to the core's D-Pad directions
• - RetroPad A maps to the core's A input

Compatibility

The official Emux NES documentation page does not list individual game compatibility results; that section is marked as awaiting a description. As a result, no per-game compatibility claims can be made from this source.