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libretro/emulators/boytacean.yml
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YAML

emulator: Boytacean
type: standalone + libretro
core_classification: official_port
source: "https://github.com/joamag/boytacean"
upstream: "https://github.com/joamag/boytacean"
profiled_date: "2026-03-23"
source_commit: "2eb66337ad1732087c26076ec5bd7d08fe9f6e93"
core_version: "0.11.5"
display_name: "Nintendo - Game Boy / Color (Boytacean)"
cores:
- boytacean
systems:
- nintendo-gb
- nintendo-gbc
notes: |
Game Boy / Game Boy Color emulator written in Rust by Joao Magalhaes.
Libretro: all boot ROMs compiled into binary as static byte arrays in
src/data.rs. load_boot_static() copies from arrays. No filesystem
access, no RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY. No external files.
ref: frontends/libretro/src/core.rs:402 instance.load(true) -> src/gb.rs:1427 -> load_boot_static
Standalone (SDL): also defaults to embedded boot ROMs via load(true).
User can override via --boot-rom-path CLI argument with any boot ROM
file. load_boot_file() with hardcoded ./res/boot/*.bin paths exists in
src/gb.rs:1477 but is not called from any frontend.
Boot ROM defaults: DmgBootix (DMG), CgbBoytacean (CGB), both open-source.
files:
- name: dmg_boot.bin
system: nintendo-gb
required: false
hle_fallback: true
mode: standalone
size: 256
note: "Original Nintendo DMG boot ROM"
source_ref: "src/gb.rs:1416, src/data.rs:14"
- name: sgb_boot.bin
system: nintendo-gb
required: false
hle_fallback: true
mode: standalone
size: 256
note: "Super Game Boy boot ROM"
source_ref: "src/gb.rs:1417, src/data.rs:29"
- name: dmg_bootix.bin
system: nintendo-gb
required: false
hle_fallback: true
mode: standalone
size: 256
note: "Open-source DMG boot ROM from Bootix (default DMG)"
source_ref: "src/gb.rs:1418, src/data.rs:44"
- name: mgb_bootix.bin
system: nintendo-gb
required: false
hle_fallback: true
mode: standalone
size: 256
note: "Open-source MGB (Pocket) boot ROM from Bootix"
source_ref: "src/gb.rs:1419, src/data.rs:59"
- name: cgb_boot.bin
system: nintendo-gbc
required: false
hle_fallback: true
mode: standalone
size: 2304
note: "Original Nintendo CGB boot ROM"
source_ref: "src/gb.rs:1420, src/data.rs:74"
- name: cgb_boytacean.bin
system: nintendo-gbc
required: false
hle_fallback: true
mode: standalone
size: 2304
note: "Custom open-source CGB boot ROM (default CGB)"
source_ref: "src/gb.rs:1421, src/data.rs:177"