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RustyNES: update for v3.0.0 (UNIF, core options, background, four players) #1215

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fpscan merged 2 commits into from
Oct 8, 2026
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RustyNES: update for v3.0.0 (UNIF, core options, background, four players) #1215

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c724382
RustyNES: update extensions, core options, background and ports
doublegate Oct 4, 2026
e2173d0
rustynes: restate that the core uses no threads or std timing
doublegate Oct 6, 2026
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8 changes: 5 additions & 3 deletions docs/library/rustynes.md
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Expand Up @@ -2,7 +2,7 @@

## Background

RustyNES is a cycle-accurate Nintendo Entertainment System (NES) and Famicom emulator written entirely in pure Rust. It targets the highest accuracy bar (comparable to Mesen and higan) through strict lockstep timing at PPU-dot resolution, without relying on threading or standard library timing.
RustyNES is a cycle-accurate Nintendo Entertainment System (NES) and Famicom emulator written entirely in pure Rust. It targets the highest accuracy bar (comparable to Mesen and higan) by running from one master clock, splitting every CPU cycle into two halves and bringing the PPU up to date at each, rather than relying on per-game hacks. The emulation core uses no threads and no standard-library timing (it builds as `no_std`), so its output depends only on the ROM and the input.

It is extremely portable and deterministic, making it a reliable choice for netplay, TAS, and accurate emulation enthusiasts.

Expand All @@ -24,6 +24,8 @@ Content that can be loaded by the RustyNES core have the following file extensio

- .nes
- .fds
- .unf
- .unif

## Databases

Expand All @@ -44,7 +46,7 @@ Frontend-level settings or features that the RustyNES core respects.
| States | ✔ |
| Rewind | ✔ |
| Netplay | ✔ |
| Core Options | ✕ |
| Core Options | ✔ |
| [Memory Monitoring (achievements)](../guides/memorymonitoring.md) | ✔ |
| RetroArch Cheats | ✔ |
| Native Cheats | ✔ |
Expand Down Expand Up @@ -82,7 +84,7 @@ marked optional at the frontend level, but no FDS game will run):

![](../image/controller/nes.png)

| User 1 - 2 input descriptors | RetroPad Inputs |
| User 1 - 4 input descriptors | RetroPad Inputs |
|------------------------------|-------------------------------------------|
| B | ![](../image/retropad/retro_b.png) |
| A | ![](../image/retropad/retro_a.png) |
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