mirror of
https://github.com/Abdess/retroarch_system.git
synced 2026-11-01 07:33:45 -06:00
Abdessamad Derraz
d9843c162b
FDS content is now also recognised by its fwNES header or side marker (lib.rs:2225-2244). disksys.rom is unchanged: 8192 bytes from the system directory, no hash.
51 lines
2.4 KiB
YAML
51 lines
2.4 KiB
YAML
emulator: RustyNES
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type: libretro
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core_classification: official_port
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source: "https://github.com/doublegate/RustyNES"
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upstream: "https://github.com/doublegate/RustyNES"
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profiled_date: "2026-10-26"
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source_commit: "3d02b99dc84fb389c03fc6b1f986ffa658dda0dd"
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core_version: "3.5.0"
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display_name: "Nintendo - NES / Famicom (RustyNES)"
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cores:
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- rustynes
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systems:
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- nintendo-nes
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- nintendo-fds
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notes: |
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RustyNES is a NES and Famicom emulator written in Rust by DoubleGate.
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The libretro core is the crates/rustynes-libretro crate of the same
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repository, built from the main branch
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(crates/rustynes-libretro/Makefile, .gitlab-ci.yml). The crate pulls
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rustynes-core with default features off and does not link the
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rustynes-hdpack crate, so no HD pack is read. The game database it links
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is compiled in (crates/rustynes-gamedb/src/lib.rs:41), and its
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game_db_user.txt overlay is read only once a host sets its directory,
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which the libretro crate never does (crates/rustynes-gamedb/src/lib.rs:356-366).
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Cartridge content needs no external file. Content is a Famicom Disk System
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image when its path ends in .fds or its bytes open with the fwNES header or
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the *NINTENDO-HVC* side marker (crates/rustynes-libretro/src/lib.rs:2225-2244).
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Such an image goes to Nes::from_disk, which needs the Famicom Disk System
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BIOS: the core joins disksys.rom to the frontend system directory and reads
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the whole file (crates/rustynes-libretro/src/lib.rs:1380-1396). A missing
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file, or a frontend without a system directory, makes retro_load_game fail
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with an error. Fds::new rejects a BIOS that is not exactly 8192 bytes
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(crates/rustynes-mappers/src/fds.rs:1368-1374). No hash is checked. The
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FDS device maps the BIOS and boots from its reset vector.
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The version comes from the workspace Cargo.toml. The .info in
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libretro-core-info says v3.4.0 and the copy in the repository v3.5.0.
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The md5 in the .info notes is not enforced by the code.
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files:
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- name: "disksys.rom"
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system: nintendo-fds
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description: "Famicom Disk System BIOS"
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required: true
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size: 8192
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validation: [size]
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source_ref: "crates/rustynes-libretro/src/lib.rs:1380-1396, crates/rustynes-core/src/nes.rs:538-540, crates/rustynes-core/src/bus.rs:1103-1108, crates/rustynes-mappers/src/fds.rs:121, crates/rustynes-mappers/src/fds.rs:1368-1374"
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note: "Read only when the content is a Famicom Disk System image, by extension or signature. Any other size fails the load."
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