mirror of
https://github.com/Abdess/retroarch_system.git
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d929424988
- Added profiled_date field to all 204 existing profiles for update tracking - Created 56 alias profiles for cores that share BIOS with a parent (e.g., mednafen_psx -> beetle_psx, fbalpha2012 -> fbneo) 260 total profiles covering all 294 libretro cores (204 unique + 56 alias).
45 lines
2.0 KiB
YAML
45 lines
2.0 KiB
YAML
emulator: Gearlynx
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type: libretro
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source: "https://github.com/drhelius/Gearlynx"
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profiled_date: "2026-03-18"
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cores: [gearlynx]
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systems: [atari-lynx]
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verification: existence
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notes: |
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Gearlynx is an Atari Lynx emulator by Ignacio Sanchez (drhelius).
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The libretro core loads lynxboot.img from the system directory at
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retro_load_game time (libretro.cpp:106-130, function load_bootroms).
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Path is built as: system_directory + "/lynxboot.img", no subdirectory.
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LoadBios in media.cpp:274 reads exactly 512 bytes (GLYNX_BIOS_SIZE
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= 0x200, defines.h:52). If the file size is not 0x200, the load is
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rejected with BIOS_LOAD_INVALID_SIZE. After loading, bytes at offset
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0x1F8 and 0x1F9 are patched (RAM/MAPCTL registers), then CRC32 is
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computed and compared against GLYNX_DB_BIOS_CRC (0x0D973C9D,
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game_db.h:38). An invalid CRC triggers a warning log but the BIOS
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is still marked as loaded (m_is_bios_loaded = true).
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Unlike Handy, Gearlynx has no HLE fallback. If the BIOS is not
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loaded (IsBiosLoaded() returns false), RunToVBlank in
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gearlynx_core_inline.h:31-37 renders a static "no bios" image
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and returns false, refusing to emulate. The BIOS is required for
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any ROM to run. Homebrew (.o, BS93 format) bypasses the normal
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boot sequence via PrepareForHomebrew() but still requires the BIOS
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to be loaded for the emulation loop to execute.
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ROM extensions: .lnx, .lyx, .o
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Core options: none documented in the libretro port.
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files:
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- name: "lynxboot.img"
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description: "Atari Lynx boot ROM"
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region: "World"
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required: true
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size: 512
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sha1: "e4ed47fae31693e016b081c6bda48da5b70d7ccb"
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md5: "fcd403db69f54290b51035d82f835e7b"
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crc32: "0d973c9d"
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source_ref: "libretro.cpp:106-130 (load_bootroms), media.cpp:274-329 (LoadBios), defines.h:52 (GLYNX_BIOS_SIZE=0x200), game_db.h:38 (GLYNX_DB_BIOS_CRC=0x0D973C9D), gearlynx_core_inline.h:33-37 (no-bios guard)"
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notes: "512-byte boot ROM validated by CRC32 after load. Invalid CRC logs a warning but still works. Missing or wrong-size file blocks emulation entirely (no HLE fallback)."
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