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.
283 lines
11 KiB
YAML
283 lines
11 KiB
YAML
emulator: Flycast Dojo
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type: standalone
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core_classification: enhanced_fork
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source: "https://github.com/blueminder/flycast-dojo"
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upstream: "https://github.com/flyinghead/flycast"
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source_commit: "d0e47e572b1e7b355e88bda8308c89d0c5156cbf"
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upstream_commit: "a172e0001351dfbc49b86860a13d5390b1c493fe"
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logo: "https://raw.githubusercontent.com/blueminder/flycast-dojo/master/shell/linux/flycast-dojo.png"
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profiled_date: "2026-08-08"
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core_version: "dojo-7-preview4"
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display_name: "Sega - Dreamcast/Naomi (Flycast Dojo)"
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cores:
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- flycast-dojo
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systems:
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- sega-dreamcast
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- sega-naomi
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- sega-naomi2
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- sega-atomiswave
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mode: standalone
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verification: existence
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notes: |
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Fork of Flycast adding rollback and delay netplay, a lobby, spectating,
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replay recording and a training mode.
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Every file below is read from the data directory, flat, with no subfolder.
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The directory is <exe>/data on Windows, $XDG_DATA_HOME/flycast-dojo or
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$HOME/.local/share/flycast-dojo on Linux, /flycast-dojo/data on Switch.
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$FLYCAST_ROOT overrides the root, $FLYCAST_BIOS_PATH adds search paths,
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and ContentPath entries are searched after the data directory.
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ref: core/linux-dist/main.cpp:157-365, core/windows/winmain.cpp:245-266,
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core/stdclass.cpp:78-97
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The boot ROM prefix follows the platform (core/hw/holly/sb_mem.cpp:27-42):
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Dreamcast -> dc_
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NAOMI -> naomi_
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NAOMI 2 -> naomi2_
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Atomiswave -> aw_
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Boot ROM search pattern (sb_mem.cpp:254,269):
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{prefix}boot.bin, {prefix}boot.bin.bin, {prefix}bios.bin, {prefix}bios.bin.bin
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Flash search takes a single name, {prefix}nvmem.bin (sb_mem.cpp:214), or
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{prefix}nvmem.bin.net once Dojo mode is on (sb_mem.cpp:195).
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The aw_ prefix never reaches a filename: sb_mem.cpp:267 skips the boot ROM
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search on Atomiswave, whose BIOS comes from awbios.zip, and its flash
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follows the per-game arcade path (sb_mem.cpp:216).
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Arcade BIOS archives are opened as <name>.zip, then <name>.7z
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(core/hw/naomi/naomi_cart.cpp:69-71). Each ROM inside is looked up by CRC
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then by filename. The crc field of every BIOS blob is left at zero, so the
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filename decides. No hash is checked on an archive.
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NAOMI 2 is a platform of its own here: naomi_cart_GetPlatform returns
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DC_PLATFORM_NAOMI2 for any game whose bios field is naomi2
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(naomi_cart.cpp:646-657), which selects the naomi2_ prefix and naomi2.zip.
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Under netplay, match playback or match recording the Dreamcast boot ROM is
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skipped and reios is forced, so both sides start from the same state.
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Product numbers T0019M and T-31101N are the two exceptions that keep the
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real BIOS (sb_mem.cpp:237-259).
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BIOS[] also declares airlbios and naomigd. No entry of Games[] carries
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either name in its bios field and loadBios is only ever called with that
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field or the literal naomi, so neither archive is opened. The Airline
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Pilots sets use the naomi BIOS (naomi_roms.cpp:821-828,854-862).
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flycast_roms.json ships beside the binary and lists an md5 for naomi.zip,
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naomi2.zip and awbios.zip. The only function reading them, CompareBIOS,
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has no live caller (DojoFile.cpp:228-242, DojoGui.cpp:1314,1369).
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Distributed with the emulator and fetched at build time: data/default.zip
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and the per-game .nvmem/.eeprom/.nvmem2 netplay files from
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flycast-netplay-nvmem, data/game_values/*.json from
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flycast-dojo-game-values, training/*.lua from flycast-dojo-training, and
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flycast_roms.json.
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ref: CMakeLists.txt:1787-1834, .github/workflows/c-cpp.yml:171-192,
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shell/linux/make-appimage.sh:136-149
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Also read but never user supplied: buttons.png overrides an on-screen
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button sheet compiled into the binary (core/rend/osd.cpp:152-171),
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mappings/*.cfg are written by the input configuration screen
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(core/input/mapping.cpp:382-445), and flycast.lua is a user script
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(core/lua/lua.cpp:746-761).
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files:
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# -------------------------------------------------------
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# Sega Dreamcast
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# -------------------------------------------------------
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- name: dc_boot.bin
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aliases: ["dc_boot.bin.bin", "dc_bios.bin", "dc_bios.bin.bin"]
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system: sega-dreamcast
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required: false
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hle_fallback: true
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min_size: 2097152
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validation: [size]
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note: "Boot ROM. reios takes over when it is absent, and is forced under netplay, match playback and match recording. Read fails below 2 MB."
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source_ref: "source core/hw/holly/sb_mem.cpp:269, source core/emulator.cpp:566-569, source core/hw/flashrom/flashrom.cpp:23-33"
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- name: dc_nvmem.bin
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system: sega-dreamcast
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required: false
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min_size: 131072
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validation: [size]
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note: "Flash memory. Created and filled with factory settings when absent."
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source_ref: "source core/hw/holly/sb_mem.cpp:214, source core/hw/holly/sb_mem.cpp:111-187"
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- name: dc_nvmem.bin.net
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system: sega-dreamcast
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required: false
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min_size: 131072
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validation: [size]
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note: "Flash memory used once Dojo mode is enabled, keeping netplay settings apart from local ones. Absent, the emulator logs that the flash is missing and creates it: the factory partition is rewritten, the user partition erased and ISP blocks and a random console id seeded (core/hw/flashrom/flashrom.h:494-524). Nothing distributed seeds it, and SaveRomFiles writes dc_nvmem.bin, never this name (core/hw/holly/sb_mem.cpp:279-286)."
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source_ref: "source core/hw/holly/sb_mem.cpp:189-230"
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- name: font.bin
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system: sega-dreamcast
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required: false
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note: "System font served by the reios font syscall. A built-in font is used when absent."
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source_ref: "source core/reios/reios.cpp:741-764, source core/oslib/oslib.cpp:195-198"
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# -------------------------------------------------------
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# Sega NAOMI
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# -------------------------------------------------------
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- name: naomi_boot.bin
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aliases: ["naomi_boot.bin.bin", "naomi_bios.bin", "naomi_bios.bin.bin"]
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system: sega-naomi
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required: false
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min_size: 2097152
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validation: [size]
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note: "Flat boot ROM. Games whose bios field is null run from it when naomi.zip is missing."
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source_ref: "source core/hw/holly/sb_mem.cpp:269, source core/hw/naomi/naomi_cart.cpp:202-207"
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- name: naomi.zip
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system: sega-naomi
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required: true
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category: bios_zip
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note: "System BIOS archive. 89 game entries name it and abort without it."
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source_ref: "source core/hw/naomi/naomi_roms.cpp:84-140, upstream core/hw/naomi/naomi_cart.cpp:194-208"
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contents:
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- name: epr-21576h.ic27
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description: Japan
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size: 2097152
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- name: epr-21577h.ic27
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description: USA
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size: 2097152
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- name: epr-21578h.ic27
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description: Export
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size: 2097152
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- name: epr-21579d.ic27
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description: Korea
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size: 2097152
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- name: f355bios.zip
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system: sega-naomi
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required: false
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category: bios_zip
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note: "Ferrari F355 Challenge twin. Required by f355twin, f355twinp and f355twn2."
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source_ref: "source core/hw/naomi/naomi_roms.cpp:47-54, source core/hw/naomi/naomi_roms.cpp:1689, 1725, 1761"
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contents:
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- name: epr-22849.ic27
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description: Japan
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size: 2097152
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- name: epr-22850.ic27
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description: USA
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size: 2097152
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- name: epr-22851.ic27
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description: Export
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size: 2097152
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- name: f355dlx.zip
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system: sega-naomi
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required: false
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category: bios_zip
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note: "Ferrari F355 Challenge deluxe. Required by f355."
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source_ref: "source core/hw/naomi/naomi_roms.cpp:56-70, source core/hw/naomi/naomi_roms.cpp:1645"
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contents:
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- name: epr-21862.ic27
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description: Japan
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size: 2097152
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- name: epr-21863.ic27
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description: USA
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size: 2097152
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- name: epr-21864.ic27
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description: Export
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size: 2097152
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- name: hod2bios.zip
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system: sega-naomi
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required: false
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category: bios_zip
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note: "House of the Dead 2. Required by hotd2, hotd2o, hotd2e and hotd2p."
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source_ref: "source core/hw/naomi/naomi_roms.cpp:72-82, source core/hw/naomi/naomi_roms.cpp:2003, 2042, 2081, 2120"
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contents:
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- name: epr-21329.ic27
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description: Japan
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size: 2097152
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- name: epr-21330.ic27
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description: USA
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size: 2097152
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- name: epr-21331.ic27
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description: Export
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size: 2097152
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# -------------------------------------------------------
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# Sega NAOMI 2
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# -------------------------------------------------------
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- name: naomi2_boot.bin
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aliases: ["naomi2_boot.bin.bin", "naomi2_bios.bin", "naomi2_bios.bin.bin"]
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system: sega-naomi2
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required: false
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min_size: 2097152
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validation: [size]
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note: "Flat boot ROM for the NAOMI 2 platform."
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source_ref: "source core/hw/holly/sb_mem.cpp:35-36, 269"
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- name: naomi2.zip
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system: sega-naomi2
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required: true
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category: bios_zip
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note: "System BIOS archive. All 43 NAOMI 2 game entries name it and abort without it."
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source_ref: "source core/hw/naomi/naomi_roms.cpp:166-172, source core/hw/naomi/naomi_cart.cpp:646-657"
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contents:
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- name: epr-23605c.ic27
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description: Japan
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size: 2097152
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- name: epr-23607c.ic27
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description: USA
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size: 2097152
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- name: epr-23608c.ic27
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description: Export
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size: 2097152
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# -------------------------------------------------------
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# Sammy Atomiswave
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# -------------------------------------------------------
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- name: awbios.zip
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system: sega-atomiswave
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required: true
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category: bios_zip
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note: "System BIOS archive. All 34 Atomiswave game entries name it and abort without it."
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source_ref: "source core/hw/naomi/naomi_roms.cpp:38-45, source core/hw/naomi/naomi_cart.cpp:194-208"
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contents:
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- name: bios0.ic23
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size: 131072
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# -------------------------------------------------------
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# Input
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# -------------------------------------------------------
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- name: gamecontrollerdb.txt
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required: false
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category: game_data
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note: "SDL controller mapping database, read from the data directory then the config directory. Not part of the release archive. SDL built-in mappings are used when absent."
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source_ref: "source core/sdl/sdl.cpp:183-191"
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platform_details:
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dreamcast:
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bios_size: 2097152
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flash_size: 131072
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ram_size: 16777216
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hle_available: true
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source_ref: "core/emulator.cpp:436-442"
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naomi:
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bios_size: 2097152
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sram_size: 32768
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ram_size: 33554432
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hle_available: false
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source_ref: "core/emulator.cpp:443-449"
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naomi2:
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bios_size: 2097152
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sram_size: 32768
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ram_size: 33554432
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eram_size: 33554432
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hle_available: false
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source_ref: "core/emulator.cpp:450-458"
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atomiswave:
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bios_size: 131072
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sram_size: 131072
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ram_size: 16777216
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hle_available: false
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source_ref: "core/emulator.cpp:459-465"
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