mirror of
https://github.com/Abdess/retroarch_system.git
synced 2026-11-01 07:33:45 -06:00
Abdessamad Derraz
e7aa9e870b
Each libretro profile records version_basis and core_version is read there at its pin. snes9x states 1.63 in snes9x.h, nestopia 2.0.0, mgba 0.11.0, vice 3.10, atari800's libretro tree 7.0.0. Cores whose build takes its version from git carry the nearest tag in describe form (flycast v2.7-90-ge88b0ce, ppsspp, duckstation, gearcoleco), placeholders copied from .info files (Git, SVN) are replaced by the code's statement, and a code that states none is null with kind none.
70 lines
3.0 KiB
YAML
70 lines
3.0 KiB
YAML
emulator: IroGB
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type: libretro
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core_classification: official_port
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source: "https://github.com/AlexSutila/IroGB"
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upstream: "https://github.com/AlexSutila/IroGB"
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profiled_date: "2026-09-03"
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source_commit: "7b6bb9b1f9cbf04e49eea0dc89c54635c2b54056"
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core_version: "v1.0.0"
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version_basis:
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kind: file
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path: "src/frontend/libretro/libretro_host.cpp"
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pattern: 'info->library_version\s+=\s+"([^"]+)'
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display_name: "Nintendo - Game Boy / Color (IroGB)"
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cores:
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- irogb
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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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IroGB is a Game Boy and Game Boy Color emulator by Alex Sutila. The
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libretro frontend lives in src/frontend/libretro of the same repository
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as the SDL3, raylib and Python frontends. The buildbot builds the
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repository default branch, release, with cmake -DBUILD_LIBRETRO=ON
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-DNO_CORE_FILESYSTEM=ON (.gitlab-ci.yml:10-14).
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Boot ROMs are read from the root of the system directory
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(src/frontend/libretro/libretro_host.cpp:61-84). The irogb_bios core
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option picks the file: dmg opens dmg_boot.bin, cgb opens cgb_boot.bin,
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auto (the default) tries cgb_boot.bin then dmg_boot.bin, none opens
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nothing (src/frontend/libretro/libretro_host.cpp:86-113). Under auto a
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DMG cartridge boots through the CGB boot ROM whenever cgb_boot.bin is
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present and gets the CGB colouring of monochrome games. The
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irogb_monochrome_dmg option turns that off.
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BootROM accepts a file of exactly 256 or 2304 bytes and rejects any
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other size (src/memory/boot.cpp:10-24). The size also picks the machine:
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a 2304-byte image starts in CGB mode (src/gbc.cpp:330-340). 256 bytes
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covers DMG, DMG0, MGB and SGB dumps, 2304 bytes CGB, CGB0, AGB0 and AGB
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dumps (includes/memory/boot.hpp:9-30). Only the two names above are
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ever opened. No hash is checked.
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Without a boot ROM, or when the file fails to open or has another size,
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the core continues with skip_bios(), which loads post-boot CPU and MMIO
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values, unmaps the boot ROM and sets CGB mode from the cartridge header
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(src/gbc.cpp:342-349, src/gbc.cpp:387-405, src/gbc.cpp:489-490).
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The .info declares cgb_bios.bin, but the code opens cgb_boot.bin.
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files:
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- name: "dmg_boot.bin"
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system: nintendo-gb
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description: "Game Boy (DMG) boot ROM"
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required: false
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hle_fallback: true
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size: 256
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validation: [size]
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source_ref: "src/frontend/libretro/libretro_host.cpp:91, src/frontend/libretro/libretro_host.cpp:106, src/frontend/libretro/libretro_host.cpp:61-84, src/memory/boot.cpp:10-24"
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note: "Opened with irogb_bios set to dmg, or to auto when cgb_boot.bin is absent."
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- name: "cgb_boot.bin"
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system: nintendo-gbc
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description: "Game Boy Color (CGB) boot ROM"
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required: false
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hle_fallback: true
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size: 2304
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validation: [size]
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source_ref: "src/frontend/libretro/libretro_host.cpp:97, src/frontend/libretro/libretro_host.cpp:104, src/frontend/libretro/libretro_host.cpp:61-84, src/memory/boot.cpp:10-24, src/gbc.cpp:330-340"
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note: "Opened with irogb_bios set to cgb or auto. Under auto it also boots DMG cartridges in CGB mode."
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