mirror of
https://github.com/Abdess/retroarch_system.git
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Abdessamad Derraz
b3b3880c19
Profiles that read two repositories, a libretro port and its upstream, now prefix each citation with source or upstream, decided by which tree carries the cited value at its pin. The emulator pages use the word to tell libretro glue, emulator code as the port carries it, and the upstream emulator apart.
42 lines
1.8 KiB
YAML
42 lines
1.8 KiB
YAML
emulator: mGBA Splitscreen
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type: libretro
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core_classification: community_fork
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source: "https://github.com/Spuds0588/mgba-splitscreen"
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upstream: "https://github.com/mgba-emu/mgba"
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profiled_date: "2026-10-04"
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source_commit: "b66511a35873bda9c961872813e58b35543bcfc5"
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core_version: "0.1.0"
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display_name: "Nintendo - Game Boy Advance (mGBA Splitscreen)"
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cores:
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- mgba_splitscreen
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systems:
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- nintendo-gba
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notes: |
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mGBA Splitscreen is a fork of mGBA that runs 2-4 linked GBA cores in a
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single libretro instance over mGBA's lockstep SIO driver. Built from
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the upstream mGBA tree with -DBUILD_LIBRETRO_SPLITSCREEN=ON
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(CMakeLists.txt:1036-1058), the fork adds the mgba-splitscreen link
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fixes (Four Swords handshake assist and a gated deadlock kick) on top
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of mGBA's library layer. The player instances live in
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src/platform/libretro-splitscreen/instances.c and reject anything that
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is not a GBA ROM (instances.c:114-119).
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The splitscreen wrapper never performs its own BIOS lookup. Each
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per-player mCore reaches mGBA's shared GBA core, which looks for
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gba_bios.bin in the system directory and uses the built-in HLE BIOS
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(src/gba/hle-bios.c) when it is missing. The core-info declares one
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optional firmware entry (gba_bios.bin) and only accepts the .gba
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extension, so GB/GBC/SGB BIOS files that upstream mGBA supports are
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unreachable here.
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files:
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- name: gba_bios.bin
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system: nintendo-gba
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required: false
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hle_fallback: true
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size: 16384 # 16 KB (GBA_SIZE_BIOS)
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validation: [size]
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note: "GBA BIOS, same file upstream mGBA uses. HLE replacement built in."
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source_ref: "source src/platform/libretro-splitscreen/mgba_splitscreen_libretro.info:34-37 (firmware0_desc/path/opt), source src/gba/gba.c:520-551 (GBALoadBIOS, inherited from mGBA core)"
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