PavelBARABANOV
815325ccec
- [x] I have read and followed the [Contribution Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/CONTRIBUTING.md#code-contributions). - [x] I have read and followed the [AI Policy](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/AI.md) - [x] I have read and followed the [Coding Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/Coding.md) to the best of my ability. ------------------- A new NSO compression method was introduced in Switch 22.0.0. This is a customized variant of zstd and is used when NSO flags have bit 7 set. Key characteristics: - ZSTD_MAGICNUMBER is set to 0x4349425A (b'ZBIC') instead of 0xFD2FB528 - ZSTD_LEGACY_SUPPORT is set to 0 - ZSTD_TRACE is set to 1, zstd version used is 1.5.7 (10507) - FSE_readNCount is replaced with a BIC (Binary Interpolative Coding) version which improves compression of entropy tables significantly Source: https://switchbrew.org/wiki/22.0.0 Implementation: - Detect ZBIC segments via NSO flag bit 7 (NsoFlags_UseZbicCompression) and/or ZBIC magic scan in nso.cpp - Fall back to LZ4 when ZBIC is not detected or returns unexpected size - Handle segment 0 alternate offset (0x100 vs 0x108) for both ZBIC and LZ4 References: - Atmosphère loader/strat zstd-zbic integration: https://github.com/Atmosphere-NX/Atmosphere/commit/082115187a0509cb6b8a757de639a4e4741b8712 - nxdumptool ZBIC segment compression support: https://github.com/DarkMatterCore/nxdumptool/commit/441e5c0904f29427987433be4eb057a2843d222a - STORM_SWITCH ZBIC implementation: https://github.com/ReiKatari/STORM_SWITCH/commit/1e09eb82b760aaf340b810031400991c0740c091 Tested with firmware 23.0.0 and ZBIC-compressed NSOs. Co-authored-by: xbzk <xbzk@eden-emu.dev> Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4482 Reviewed-by: CamilleLaVey <camillelavey99@gmail.com> Reviewed-by: lizzie <lizzie@eden-emu.dev> Reviewed-by: Maufeat <sahyno1996@gmail.com>
Eden
Eden is a free and open-source (FOSS) Switch 1 emulator started by developer Camille LaVey.
Written in C++, with builds for Windows, Linux, macOS, Android, FreeBSD and more.
Compatibility | Development | Building | Download | Support | License
Compatibility
The emulator is capable of running most commercial games at full speed, provided you meet the necessary hardware requirements.
A list of supported games will be available in future. Please be patient.
Check out our website for the latest news on exciting features, monthly progress reports, and more!
Contribute
To contribute to Eden; be it financially, code, bug reports, or otherwise, see our Contributing guidelines.
Documentation
We have a user manual! See our User Handbook.
Building
See the General Build Guide
For information on provided development tooling, see the Tools directory
Download
You can download the latest releases from our release page.
Save us some bandwidth! We have mirrors available as well.
License
Eden is licensed under the GPLv3 (or any later version). Refer to the LICENSE.txt file.
Special thanks
Super special thanks to Cloudflare for preventing the git server from blowing up.
- Yuzu
- Ryujinx
- Sudachi
- Citron
- Torzu
- Suyu
- Ryubing
And everyone who continues or had contributed to the project! <3