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https://github.com/Abdess/retroarch_system.git
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Every profile now has: - profiled_date: date of source code analysis - core_version: version from libretro-core-info .info files - display_name: human-readable name from .info files 260/260 profiles complete. 294/294 libretro cores covered. Standalone emulators (cemu, rpcs3, xemu, vita3k) versioned manually.
76 lines
2.9 KiB
YAML
76 lines
2.9 KiB
YAML
emulator: Boytacean
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type: libretro
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source: "https://github.com/joamag/boytacean"
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profiled_date: "2026-03-18"
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core_version: "0.10.13"
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display_name: "Nintendo - Game Boy / Color (Boytacean)"
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cores:
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- boytacean
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systems:
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- nintendo-gb
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- nintendo-gbc
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notes: |
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Boytacean is a Game Boy / Game Boy Color emulator written in Rust by Joao Magalhaes.
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No external BIOS or boot ROM files are needed.
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The core ships with multiple boot ROMs compiled directly into the binary as static
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byte arrays in src/data.rs. For DMG mode the default is "DMG Bootix" (an open-source
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boot ROM forked from SameBoy's Bootix project, 256 bytes). For CGB mode the default
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is "CGB Boytacean" (a custom open-source CGB boot ROM, 2304 bytes). The original
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Nintendo DMG, SGB, and CGB boot ROMs are also embedded as static arrays (DMG_BOOT,
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SGB_BOOT, CGB_BOOT) but the defaults use the open-source replacements.
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The libretro frontend (frontends/libretro/src/core.rs) calls instance.load(true) in
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retro_load_game(), which routes through load_dmg() or load_cgb() depending on the
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cartridge header. These call load_boot_static() which copies one of the embedded byte
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arrays into MMU memory. There is no RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY call, no
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filesystem access for boot ROMs, and no core option to load external boot ROM files.
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The .info file (boytacean_libretro.info) lists no firmware entries.
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Boot ROM selection defaults:
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- DMG: BootRom::DmgBootix (gb.rs:1389) - open-source, 256 bytes
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- CGB: BootRom::CgbBoytacean (gb.rs:1398) - open-source, 2304 bytes
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All boot ROM source code lives in src/boot/, forked from SameBoy and assembled
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with rgbds. The compiled binaries are then converted to Rust const arrays in data.rs.
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files: []
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analysis:
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embedded_boot_roms:
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dmg_boot:
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constant: DMG_BOOT
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size: 256
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description: "Original Nintendo DMG boot ROM (embedded, not default)"
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source_ref: "data.rs:14-27"
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sgb_boot:
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constant: SGB_BOOT
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size: 256
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description: "Super Game Boy boot ROM (embedded, not default)"
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source_ref: "data.rs:29-42"
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dmg_bootix:
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constant: DMG_BOOTIX
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size: 256
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description: "Open-source DMG boot ROM from Bootix project (default for DMG)"
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source_ref: "data.rs:44-57"
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mgb_bootix:
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constant: MGB_BOOTIX
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size: 256
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description: "Open-source MGB (Game Boy Pocket) boot ROM from Bootix project"
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source_ref: "data.rs:59-72"
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cgb_boot:
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constant: CGB_BOOT
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size: 2304
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description: "Original Nintendo CGB boot ROM (embedded, not default)"
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source_ref: "data.rs:74-175"
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cgb_boytacean:
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constant: CGB_BOYTACEAN
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size: 2304
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description: "Custom open-source CGB boot ROM (default for CGB)"
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source_ref: "data.rs:177-275"
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filesystem_access: false
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system_directory_used: false
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boot_rom_source: "src/boot/ (assembly, forked from SameBoy)"
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