mirror of
https://github.com/Abdess/retroarch_system.git
synced 2026-04-13 12:22:33 -05:00
de1940d57c
Batch analysis of all 273 profiles to identify HLE/embedded fallbacks. Added hle_fallback: true where the core has verified software replacement for missing BIOS files: - Embedded ROMs: vice (102), ep128emu (22), fuse (18), frodo (4) - HLE BIOS: bsnes* (33 across 3 profiles), puae (9 AROS), noods (4), melonds* (6 FreeBIOS), flycast (3 reios) - Open-source replacements: sameboy (8), pokemini (1), gpsp (1) - Built-in fallbacks: np2kai (7), atari800 (6 Altirra), picodrive (3), quasi88 (4), gambatte (2) Conservative: only added where notes or source code confirm HLE. Skipped 50+ profiles where files are optional alternatives, not HLE replaceable (neocd, opera, kronos, pcem, etc.)
74 lines
3.5 KiB
YAML
74 lines
3.5 KiB
YAML
emulator: Nestopia UE
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type: libretro
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source: "https://github.com/libretro/nestopia"
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logo: "https://raw.githubusercontent.com/0ldsk00l/nestopia/master/icons/svg/nestopia.svg"
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profiled_date: "2026-03-18"
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core_version: "1.53.1"
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display_name: "Nintendo - NES / Famicom (Nestopia)"
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systems: [nintendo-nes, nintendo-fds]
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notes: |
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Nestopia UE (Undead Edition) is a cycle-accurate NES/Famicom emulator.
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NES cartridge games need no BIOS. Famicom Disk System games require
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the FDS BIOS ROM (disksys.rom, 8 KB) loaded from the system directory.
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The core validates the BIOS via CRC32 against two known dumps:
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standard Famicom (0x5E607DCF) and Twin Famicom (0x4DF24A6C).
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An unknown BIOS triggers a warning but still loads.
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NstDatabase.xml is an optional game database used for region autodetection,
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aspect ratio selection, and 4-player adapter recognition. A copy is baked
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into the core binary (libretro/nstdatabase.hpp) and used as fallback when
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no external file is found. Placing a newer NstDatabase.xml in the system
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directory overrides the built-in copy.
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An optional custom palette file (custom.pal, 192 bytes, 64 RGB triplets)
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overrides the built-in palettes when the nestopia_palette core option is
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set to Custom. The core ships with 10+ built-in palettes (Royaltea,
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Smooth FBx, etc.) so the external file is rarely needed.
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Audio samples for specific games can be placed in system/nestopia/samples/
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as numbered .wav files (e.g., 00.wav, 01.wav). This is used for Famicom
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expansion audio in a few titles.
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Game Genie is handled as cheat code decoding (software), not via a ROM file.
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File path construction: libretro/libretro.cpp retro_load_game() joins the
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system directory (RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY) with each
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filename directly - no subdirectories.
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files:
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# --- Famicom Disk System BIOS (required for FDS games) ---
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- name: "disksys.rom"
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system: nintendo-fds
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description: "FDS BIOS ROM"
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required: true
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size: 8192
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md5: "ca30b50f880eb660a320674ed365ef7a"
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sha1: "57fe1bdee955bb48d357e463ccbf129496930b62"
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source_ref: "libretro/libretro.cpp:1608-1634 (FDS load), source/core/NstFds.cpp:61-131 (Bios class, CRC32 validation)"
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notes: "Mapped at 0xE000-0xFFFF (8 KB). retro_load_game returns false if missing when loading .fds files. CRC32 checked: Famicom 0x5E607DCF, Twin Famicom 0x4DF24A6C."
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# --- NES game database (optional, overrides baked-in copy) ---
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- name: "NstDatabase.xml"
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system: nintendo-nes
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description: "Nestopia game database for region and mapper autodetection"
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required: false
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hle_fallback: true
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size: 1022369
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md5: "0ee6cbdc6f5c96ce9c8aa5edb59066f4"
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sha1: ~
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source_ref: "libretro/libretro.cpp:1561-1586 (database load), libretro/nstdatabase.hpp (baked-in fallback)"
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notes: "XML database matching games by SHA1+CRC32. Used for region, mapper, mirroring, and 4-player adapter detection. Built-in fallback exists so this file is optional. Hash is for the upstream copy shipped with the core repo."
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# --- Custom palette (optional, core option nestopia_palette = Custom) ---
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- name: "custom.pal"
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system: nintendo-nes
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description: "External NES color palette"
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required: false
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hle_fallback: true
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size: 192
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md5: ~
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sha1: ~
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source_ref: "libretro/libretro.cpp:1540-1559 (palette load)"
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notes: "64 RGB triplets (64 x 3 bytes = 192 bytes). Only loaded when nestopia_palette core option is set to Custom. Falls back to built-in Royaltea palette if not found. Multiple valid palettes exist so no single canonical hash."
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