mirror of
https://github.com/Abdess/retroarch_system.git
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Abdessamad Derraz
cbed064613
Lunar - Silver Star Story Complete (Japan) needs the MPEG card and stops Yabause after its logos. Lunar - Silver Star Story (Japan) reaches its title on Beetle Saturn and Yabause with the RetroArch pack's BIOS (records 2026-10-28-6b5b55d3480f, 2026-10-28-9270d1928be7), judged against the reference frames added to the oracle.
80 lines
2.9 KiB
YAML
80 lines
2.9 KiB
YAML
emulator: "Yabause"
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type: libretro
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core_classification: community_fork
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source: "https://github.com/libretro/yabause"
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upstream: "https://github.com/Yabause/yabause"
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profiled_date: "2026-03-25"
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source_commit: "8926b0c6c347f8c5c755911ddb0ac695420ffbf8"
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core_version: "v0.9.15"
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version_basis:
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kind: file
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path: "yabause/src/libretro/libretro.c"
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pattern: 'info->library_version\s+=\s+"([^"]+)'
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display_name: "Sega - Saturn (Yabause)"
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cores:
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- yabause
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systems:
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- sega-saturn
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notes: |
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Yabause is a software-rendered Sega Saturn emulator. Upstream project is
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dead. The libretro port is maintained by the community on the master branch of
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libretro/yabause.
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Saturn BIOS search order:
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1. {system}/saturn_bios.bin
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2. {system}/sega_101.bin
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3. {system}/mpr-17933.bin
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First file found wins. HLE BIOS available via yabause_force_hle_bios core
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option (reduced compatibility). Multi-disc (m3u) requires real BIOS.
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Addon cartridges: 1M/4M RAM expansion via core option (no files needed).
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ROM cartridge loading, SH1 ROM (CD Block LLE), and MPEG card ROM are
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standalone-only features disabled in the libretro port.
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The CD block answers every MPEG card authentication as passed
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(yabause/src/cs2.c:3172-3212) but decodes no MPEG stream: MPEG Get Interrupt
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always reports 0 (yabause/src/cs2.c:2870-2884), and the port passes no MPEG
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ROM (yabause/src/libretro/libretro.c:1118). A disc that needs the Movie Card,
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such as Lunar - Silver Star Story Complete (Japan), passes its check under a
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real BIOS and stops on a black screen after the publisher logos. The Japanese
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v1.00 and v1.01 images give the same frames, so the BIOS is not the cause
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(record 2026-10-28-32cdefcdb231). Under the HLE BIOS the disc prints that it
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needs the Twin Operator Movie Card or a Hi-Saturn. The edition without the
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card, Lunar - Silver Star Story (Japan), reaches its title on the same v1.00
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image (record 2026-10-28-9270d1928be7).
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BIOS loading: retro_load_game() at yabause/src/libretro/libretro.c:1035-1049.
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Core load: LoadBios() at yabause/src/memory.c:1260-1263, T123Load() at yabause/src/memory.h:196-265.
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files:
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- name: "saturn_bios.bin"
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system: sega-saturn
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priority: 1
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required: true
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hle_fallback: true
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max_size: 524288
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validation: [max_size]
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note: "Primary Saturn BIOS. Any region accepted."
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source_ref: "source yabause/src/libretro/libretro.c:1035"
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- name: "sega_101.bin"
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system: sega-saturn
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priority: 2
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required: false
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hle_fallback: true
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max_size: 524288
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validation: [max_size]
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note: "Saturn BIOS v1.01 (Japan). Fallback if saturn_bios.bin missing."
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source_ref: "source yabause/src/libretro/libretro.c:1039"
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- name: "mpr-17933.bin"
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system: sega-saturn
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priority: 3
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required: false
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hle_fallback: true
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max_size: 524288
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validation: [max_size]
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note: "Saturn BIOS (NA/EU). Last fallback."
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source_ref: "source yabause/src/libretro/libretro.c:1043"
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