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feat: profile eleven standalone emulators
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emulator: Lindbergh Loader
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type: standalone
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core_classification: embedded_hle
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source: "https://github.com/lindbergh-loader/lindbergh-loader"
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upstream: "https://github.com/lindbergh-loader/lindbergh-loader"
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source_commit: "0af606d845b70339c335785c0eba68b47b78df3c"
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profiled_date: "2026-08-08"
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core_version: "2.1.4"
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display_name: "Sega - Lindbergh (Lindbergh Loader)"
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cores:
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- lindbergh-loader
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systems:
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- sega-lindbergh
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mode: standalone
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notes: |
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Runs the original Sega Lindbergh game binaries on Linux, built and executed
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as 32-bit x86. The launcher picks the game ELF, exports
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LD_PRELOAD=lindbergh.so and an
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LD_LIBRARY_PATH covering the loader directory, the original directory, the
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game directory and ".:lib:../lib", then system()s the ELF
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(lindbergh.c:315-378, 874-929). Platforms invoke it as lindbergh-loader
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(Batocera package and generator, RetroBat, ES-DE find rule LINDBERGH-LOADER).
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The Lindbergh hardware is emulated inside lindbergh.so with no external
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firmware. Hooked open() and fopen() redirect /dev/lbb (baseboard), /dev/i2c/0
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(eeprom), /dev/ttyS0 and /dev/ttyS1 (drive, ride, motion boards and card
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reader), /proc/bus/pci/01/00.0 and /proc/bus/pci/00/1f.0 to /dev/zero and
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answer from code (hook.c:43, 530-615, 641-853). The security board is DIP
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switches and test/service lines computed in securityBoard.c:98-140, with no
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keychip dump. eeprom.bin and sram.bin are created on first run and their
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contents synthesised: eepromSettings.c builds every amSysDataRecord section
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from constants and recomputes the CRCs (eeprom.c:33-48, baseBoard.c:60-74,
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eepromSettings.c:24-120). Card_01.crd and Card_02.crd are written from a
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56-byte header held in the binary (cardReader.c:227-247). lindbergh.ini and
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controls.ini are optional; both fall back to compiled-in defaults and can be
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emitted with --create (config.c:510-516, sdlInput.c:790-795).
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The one hard external dependency is the NVIDIA Cg runtime. findLibCg() checks
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LIBCG_PATH from the ini, then /app/lib32/libCg2.so, $APP_IMG_ROOT/usr/lib32/
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libCg2.so, ./libCg.so and $LINDBERGH_LOADER_CURRENT_DIR/libCg.so, and exits
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when none is present (shaderPatches.c:1028-1108). Cg 3.1 is a separate
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requirement: the game ELFs link libCg.so and libCgGL.so, which upstream
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vendors as libs/Cg-3.1.zip and installs into the runtime library directory
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(scripts/appimage/make-appimage.sh,
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scripts/flatpak/com.github.lindberghloader.yml:181-189, 242-245). Batocera
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copies per-game Cg variants into the ROM directory
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(lindberghGenerator.py:1027-1050).
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Shaders come from the game dump, not from the loader. cacheModedShaderFiles()
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reads ../fs/shader and /data/Shader relative to the ELF, patches the Cg
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source and serves the result back through the fopen, fread and ftell hooks
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(shaderCache.c:474-488, 555-678, hook.c:778-808, 1140-1212).
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Boot logos and console fonts were user-supplied until 2.0.1, which added
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built-in copies compiled into lindbergh.so and served from
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resources/logo.h and resources/font.h. The originals are read only when
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DISABLE_BUILTIN_LOGOS or DISABLE_BUILTIN_FONT is set, from the game
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directory (hook.c:655-744, 874-926, fread hook at 1159-1181). Batocera
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exposes both switches as ORIGINAL LOGOS and ORIGINAL FONTS.
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Custom cursors and crosshairs load from arbitrary ini paths with no default
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name and no built-in image (crossHair.c:142-186, customCursor.c:26-33).
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files:
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# -- NVIDIA Cg runtime --
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- name: libCg2.so
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system: sega-lindbergh
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required: true
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validation: [signature]
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description: "NVIDIA Cg 2.0.0.12 runtime used to recompile the game shaders"
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source_ref: "shaderPatches.c:1028-1108, 1110-1170"
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note: >-
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Searched at LIBCG_PATH, /app/lib32/libCg2.so, $APP_IMG_ROOT/usr/lib32/
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libCg2.so, then ./libCg.so and $LINDBERGH_LOADER_CURRENT_DIR/libCg.so. The
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loader reads 8 bytes at offset 0x226d84 and requires exactly "2.0.0.12";
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a missing file, a different version string or a failed dlopen of
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cgCreateContext, cgCreateProgram, cgGetProgramString, cgDestroyContext or
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cgDestroyProgram each call exit(EXIT_FAILURE). Upstream vendors the build
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as libs/libCg.so and both installers rename it to libCg2.so so it can sit
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beside the Cg 3.1 library of the same original name that the games link.
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- name: libCgGL.so
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system: sega-lindbergh
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required: true
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description: "NVIDIA Cg 3.1 OpenGL runtime linked by the game binaries"
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source_ref: "lindbergh.c:336-378, scripts/flatpak/com.github.lindberghloader.yml:181-189"
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note: >-
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Resolved by the dynamic linker for the game ELF through the
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LD_LIBRARY_PATH the launcher builds, not opened by loader code. Upstream
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takes it from Cg-3.1_April2012_x86.tgz and ships it in libs/Cg-3.1.zip.
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Game dumps generally carry their own copy in the game directory, so the
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Batocera generator only writes one when the file is absent or differs.
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- name: libCg.so
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system: sega-lindbergh
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required: true
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description: "NVIDIA Cg 3.1 runtime linked by the game binaries"
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source_ref: "lindbergh.c:336-378, scripts/flatpak/com.github.lindberghloader.yml:181-189"
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note: >-
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Same origin and mechanism as libCgGL.so, and a different build from the
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2.0.0.12 library the shader recompiler loads. Batocera keeps the two Cg
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generations apart as libCg.so.harley and libCg.so.other and copies the
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matching pair into the ROM directory per game, overwriting the dump's own
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copy for the titles where it renders shadows and textures incorrectly.
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# -- Lindbergh system libraries kept out of current distributions --
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- name: libcrypto.so.0.9.7
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system: sega-lindbergh
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required: false
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description: "OpenSSL 0.9.7 crypto library linked by the networked games"
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source_ref: "lindbergh.c:336-378, scripts/flatpak/com.github.lindberghloader.yml:244"
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note: >-
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Vendored as libs/libcrypto.so.0.9.7 and installed into the runtime library
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directory by both the AppImage and Flatpak builds. Resolved by the dynamic
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linker for the game ELF.
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- name: libssl.so.0.9.7
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system: sega-lindbergh
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required: false
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description: "OpenSSL 0.9.7 TLS library linked by the networked games"
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source_ref: "lindbergh.c:336-378, scripts/flatpak/com.github.lindberghloader.yml:245"
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note: "Vendored as libs/libssl.so.0.9.7, paired with libcrypto.so.0.9.7."
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- name: libopenal.so.0
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system: sega-lindbergh
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required: false
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description: "OpenAL runtime preloaded for Quiz Answer x Answer"
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source_ref: "lindbergh.c:22, 315-328, 882-890"
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note: >-
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When the ELF is q2satl_lind the launcher looks the file up through
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findPreloadLibrary and appends it to LD_PRELOAD. Absence prints "You might
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not get sound because libopenal.so.0 was not found" and the game still
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runs. Vendored as libs/libopenal.so.0.
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# -- Lindbergh boot program --
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- name: segaboot
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system: sega-lindbergh
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required: false
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crc32: "38d56318"
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validation: [crc32]
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description: "Sega Lindbergh boot and hardware check program, version 2.4"
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source_ref: "lindbergh.c:696-698, 892-895, config.h:57-58, gameData.c:51-52"
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note: >-
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Run as "segaboot -t" under -s or --segaboot. detectGame() matches the
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ELF CRC32 against the table, where 0x38d56318 is Segaboot 2.4 and
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0xa518b18b the build carrying symbols. The comparison drives
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identification only: an unknown CRC logs a warning and startup continues.
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SEGABOOT 0x0027 and SEGABOOT_2_6 0x0030 in config.h are placeholders, not
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checksums, and no table entry uses them.
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# -- Lindbergh boot assets, replaced by built-in copies since 2.0.1 --
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- name: logo.tga
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system: sega-lindbergh
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required: false
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hle_fallback: true
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description: "Lindbergh boot logo, read from /usr/lib/boot on the original system"
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source_ref: "hook.c:655-667, 888-900"
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note: >-
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Read from the game directory only when DISABLE_BUILTIN_LOGOS is set.
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Otherwise the logoLL array in resources/logo.h answers the read.
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- name: logo_red.tga
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system: sega-lindbergh
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required: false
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hle_fallback: true
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description: "Lindbergh Red boot logo, read from /usr/lib/boot on the original system"
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source_ref: "hook.c:669-681, 874-886"
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note: >-
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Read from the game directory only when DISABLE_BUILTIN_LOGOS is set.
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Otherwise the logoLLRed array in resources/logo.h answers the read.
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- name: SEGA_KakuGothic-DB-Roman_12.tga
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system: sega-lindbergh
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required: false
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hle_fallback: true
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description: "Sega Kaku Gothic console font texture"
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source_ref: "hook.c:718-730, 902-914"
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note: >-
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Read from the game directory only when DISABLE_BUILTIN_FONT is set.
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Otherwise the fontTGA array in resources/font.h answers the read.
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- name: SEGA_KakuGothic-DB-Roman_12.abc
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system: sega-lindbergh
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required: false
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hle_fallback: true
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description: "Sega Kaku Gothic console font metrics"
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source_ref: "hook.c:732-744, 916-928"
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note: >-
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Read from the game directory only when DISABLE_BUILTIN_FONT is set.
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Otherwise the fontABC array in resources/font.h answers the read, with
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ftell returning fontABClen.
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- name: LucidaConsole_12.tga
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system: sega-lindbergh
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required: false
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hle_fallback: true
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description: "Lucida Console font texture"
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source_ref: "hook.c:683-695"
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note: >-
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Read from the game directory only when DISABLE_BUILTIN_FONT is set.
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Otherwise the fontTGA array in resources/font.h answers the read.
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- name: LucidaConsole_12.abc
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system: sega-lindbergh
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required: false
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hle_fallback: true
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description: "Lucida Console font metrics"
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source_ref: "hook.c:697-709"
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note: >-
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Read from the game directory only when DISABLE_BUILTIN_FONT is set.
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Otherwise the fontABC array in resources/font.h answers the read.
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# -- Lindbergh runtime configuration --
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- name: lindbergrc
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system: sega-lindbergh
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required: false
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description: "Lindbergh runtime configuration read by the games from /root"
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source_ref: "hook.c:650-653"
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note: >-
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The fopen hook rewrites /root/lindbergrc to lindbergrc in the game
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directory. The loader neither creates the file nor substitutes for it.
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- name: gamecontrollerdb.txt
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system: sega-lindbergh
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category: game_data
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required: false
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description: "SDL gamepad mappings added on top of the built-in table"
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source_ref: "lindbergh.c:415-430, 478, sdlInput.c:209-217"
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note: >-
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Loaded from the path given by -d or --controllerdb, passed through the
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LINDBERGH_CONTROLS_DB_PATH environment variable. The built-in mappings in
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gameControllerMappings.c load first and remain when no file is supplied.
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