mirror of
https://github.com/Abdess/retroarch_system.git
synced 2026-04-13 12:22:33 -05:00
73ccb216f5
cross_reference.py: add bios_mode/agnostic/load_from filters, archive grouping, unsourceable field support. verify.py: case-insensitive by_name lookup, storage:release in_repo, unsourceable skip, trailing slash fix. generate_site.py: enriched all_declared, platform-relevant profile filtering, proper in_repo resolution on emulator pages, acknowledged gaps section. New BIOS: delta2.rom (XRoar), tilekey.dat + sprites.sif (NXEngine), Gram Kracker.ctg + cf7+.ctg + ti-pcard.ctg (ti99sim), desc.dat (SDLPAL). Profiles: hle_fallback on tilekey.dat/key.txt, unsourceable on 7 files with source-verified reasons.
87 lines
3.9 KiB
YAML
87 lines
3.9 KiB
YAML
emulator: NXEngine
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type: libretro
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core_classification: game_engine
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source: "https://github.com/libretro/nxengine-libretro"
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upstream: "https://github.com/Rox64/NXEngine"
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profiled_date: "2026-03-24"
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core_version: "1.0.0.6"
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display_name: "Cave Story (NXEngine)"
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cores: [nxengine]
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systems: [cave-story]
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notes: |
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NXEngine is an open-source reimplementation of the Cave Story (Doukutsu
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Monogatari) engine by Studio Pixel, authored by Caitlin Shaw. It is not
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an emulator but a source port that loads the original freeware game data.
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The core requires the freeware Cave Story distribution placed in
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{system_dir}/nxengine/. When launched without content, it looks for
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Doukutsu.exe there (libretro.cpp:254-259). When launched with a .exe
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content file, it uses the parent directory of that file (libretro.cpp:237).
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At startup (main.cpp:75-90), the core opens Doukutsu.exe and extracts:
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ORG music (extractorg.c), PXT sound effects (extractpxt.c), stage tile
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attributes (extractstages.c), 18 credit BMPs + pixel.bmp (endpic/),
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and the wavetable (cachefiles.c:464-485). All kept in memory.
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The data/ directory (399 files from the freeware release) is loaded into
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an in-memory cache at init (cachefiles.c:38-439, 497-540). All subsequent
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file access goes through this cache. The core verifies data/ by checking
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for data/npc.tbl (main.cpp:47-58).
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The font is compiled-in (bitmap_font.h). The upstream standalone version
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uses font.ttf via SDL_ttf.
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Valid content extension: .exe (libretro.cpp:109).
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files:
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- name: "Doukutsu.exe"
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path: "nxengine/Doukutsu.exe"
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category: game_data
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system: cave-story
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description: "Cave Story freeware executable (data source for music, sfx, bitmaps, wavetable)"
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required: true
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size: 1478656
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md5: "38695d3d69d7a0ada8178072dad4c58b"
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sha1: "bb2d0441e073da9c584f23c2ad8c7ab8aac293bf"
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source_ref: "main.cpp:77-78 (opened for extraction), libretro.cpp:258 (existence check)"
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note: "Placed in system/nxengine/. The core extracts ORG music, PXT sounds, stage tile attributes, BMP graphics, and wavetable from this binary at each launch."
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- name: "data/"
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path: "nxengine/data/"
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category: game_data
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system: cave-story
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description: "Full game asset directory tree (399 files: sprites, NPC sheets, stage maps, scripts, backgrounds)"
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required: true
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source_ref: "cachefiles.c:38-439 (filenames[] array loaded at init)"
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note: "Must contain root assets (Arms.pbm, MyChar.pbm, etc.), Npc/ (36 sprite sheets), and Stage/ (333 map/script/tileset files). All files from the original freeware release."
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- name: "data/npc.tbl"
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path: "nxengine/data/npc.tbl"
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category: game_data
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system: cave-story
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description: "NPC attribute table (entity behavior flags, HP, damage, display rect offsets)"
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required: true
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source_ref: "main.cpp:50 (existence check for data/ directory), ai/ai.cpp:56-59 (loaded for NPC properties)"
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note: "Located in system/nxengine/data/. Used to validate data directory presence and to load NPC behavior attributes."
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- name: "data/sprites.sif"
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path: "nxengine/data/sprites.sif"
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category: game_data
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system: cave-story
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description: "Sprite information file (sprite positions, sizes, animation data)"
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required: false
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hle_fallback: true
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source_ref: "cachefiles.c:101 (in filenames[]), cachefiles.c:515-521 (compiled-in fallback from sprites_sif.h)"
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note: "Not shipped in the freeware distribution. If missing, the core uses a compiled-in copy (sprites_sif.h)."
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- name: "tilekey.dat"
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path: "nxengine/tilekey.dat"
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category: game_data
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system: cave-story
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description: "Tile attribute lookup table (maps tile codes to collision/behavior attributes)"
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required: false
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hle_fallback: true
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source_ref: "map.cpp:290-303 (loaded at init, hardcoded default if missing)"
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note: "Not part of the freeware distribution. Generated by the standalone NXEngine extraction tool. The libretro core has hardcoded defaults in map.cpp:30."
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