mirror of
https://github.com/Abdess/retroarch_system.git
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e13e8734b9
240 file-level entries used notes: instead of the canonical note: field. verify.py and cross_reference.py only read note:, so these were silently ignored.
118 lines
3.9 KiB
YAML
118 lines
3.9 KiB
YAML
emulator: Virtual Jaguar
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type: libretro
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core_classification: community_fork
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source: "https://github.com/libretro/virtualjaguar-libretro"
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upstream: "http://shamusworld.gotdns.org/git/virtualjaguar"
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profiled_date: "2025-03-25"
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core_version: "v2.1.0"
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display_name: "Atari - Jaguar (Virtual Jaguar)"
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cores:
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- virtualjaguar
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systems:
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- atari-jaguar
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notes: |
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Virtual Jaguar embeds all BIOS ROMs directly in the source code as C arrays
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(bin2c generated). No external BIOS files are loaded at runtime. The core
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selects between K-series and M-series boot ROMs based on vjs.biosType,
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then copies 0x20000 bytes to jagMemSpace + 0xE00000 (libretro.c:902-904).
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The "BIOS" core option (virtualjaguar_bios, disabled by default) controls
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whether the embedded boot ROM is executed at startup. When enabled, the
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boot ROM entry point is copied to jaguarMainRAM (jaguar.c:644-645).
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When disabled, jaguarRunAddress is written directly, skipping the boot
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animation. Either way the embedded ROM data is always present in memory.
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The jagBootPath and CDBootPath fields in VJSettings exist in the struct
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(settings.h:36-37) but are never populated or used in the libretro port.
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No call to RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY or fopen for BIOS files.
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Jaguar CD emulation: the CD boot ROM (jaguarCDBootROM, 0x40000 bytes) is
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also embedded but Jaguar CD support is incomplete in this core. The
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cdrom.c references "CD BIOS" in comments only.
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No external BIOS files are required or loaded by this core.
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files: []
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analysis:
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embedded_bios:
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k_series_boot_rom:
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source_file: src/jagbios.c
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header: src/jagbios.h
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symbol: jaguarBootROM
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size: 131072 # 0x20000, 128 KB
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description: "Jaguar K-series boot ROM"
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filedb_crc: "0xFB731AAA"
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filedb_name: "[BIOS] Atari Jaguar (World)"
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m_series_boot_rom:
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source_file: src/jagbios2.c
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header: src/jagbios2.h
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symbol: jaguarBootROM2
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size: 131072 # 0x20000, 128 KB
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description: "Jaguar M-series boot ROM"
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cd_boot_rom:
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source_file: src/jagcdbios.c
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header: src/jagcdbios.h
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symbol: jaguarCDBootROM
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size: 262144 # 0x40000, 256 KB
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description: "Jaguar CD boot ROM"
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filedb_crc: "0x687068D5"
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filedb_name: "[BIOS] Atari Jaguar CD (World)"
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stubulator_93:
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source_file: src/jagstub1bios.c
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header: src/jagstub1bios.h
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symbol: jaguarDevBootROM1
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size: 131072 # 0x20000, 128 KB
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description: "Jaguar Stubulator '93 dev BIOS"
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filedb_crc: "0xE60277BB"
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filedb_name: "[BIOS] Atari Jaguar Stubulator '93 (World)"
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stubulator_94:
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source_file: src/jagstub2bios.c
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header: src/jagstub2bios.h
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symbol: jaguarDevBootROM2
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size: 131072 # 0x20000, 128 KB
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description: "Jaguar Stubulator '94 dev BIOS"
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filedb_crc: "0x8D15DBC6"
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filedb_name: "[BIOS] Atari Jaguar Stubulator '94 (World)"
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dev_cd_boot_rom:
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source_file: src/jagdevcdbios.c
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header: src/jagdevcdbios.h
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symbol: jaguarDevCDBootROM
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size: 262144 # 0x40000, 256 KB
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description: "Jaguar Developer CD boot ROM"
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filedb_crc: "0x55A0669C"
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filedb_name: "[BIOS] Atari Jaguar Developer CD (World)"
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bios_type_enum:
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source_ref: "settings.h:46"
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values:
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- BT_K_SERIES
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- BT_M_SERIES
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- BT_STUBULATOR_1
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- BT_STUBULATOR_2
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core_option:
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key: virtualjaguar_bios
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label: "BIOS"
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description: "Use the Jaguar BIOS, required for some games."
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default: disabled
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source_ref: "libretro_core_options.h:123"
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bios_loading:
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mechanism: embedded
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load_address: "0xE00000"
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load_size: "0x20000"
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source_ref: "libretro.c:902-904"
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selection_logic: "biosType == BT_K_SERIES ? jaguarBootROM : jaguarBootROM2"
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external_loading: false
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note: |
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jagBootPath and CDBootPath struct fields are never set in the libretro
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port. The standalone Virtual Jaguar GUI uses them but that code path
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is not compiled into the libretro core.
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