mirror of
https://github.com/Abdess/retroarch_system.git
synced 2026-10-18 09:23:26 -05:00
Abdessamad Derraz
a8bfadd4c1
Recalbox builds seven board images with different emulators. The new target scraper reads each board's defconfig against the package every system.ini core names. The names that reached no profile are mapped to the projects Recalbox builds or profiled from their source, and the mupen64plus video plugins are set aside.
182 lines
6.7 KiB
YAML
182 lines
6.7 KiB
YAML
emulator: Flycast
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type: standalone + libretro
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core_classification: official_port
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source: "https://github.com/libretro/flycast"
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upstream: "https://github.com/flyinghead/flycast"
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logo: "https://raw.githubusercontent.com/flyinghead/flycast/master/shell/linux/flycast.png"
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profiled_date: "2026-03-23"
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source_commit: "bde196bfbf541435d0e7d3e3fa91dbd154e7c502"
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core_version: "0.1"
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display_name: "Sega - Dreamcast/Naomi (Flycast)"
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cores:
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- flycast
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- flycast_dev
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- flycastvl
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- "flycast-next"
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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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notes: |
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Flycast has a built-in HLE BIOS (reios) for Dreamcast that can boot most
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games without real BIOS files. Arcade systems (NAOMI, Atomiswave) require
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MAME-format BIOS ROM archives.
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The libretro port (libretro/flycast, last updated 2025-12-12) is significantly
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behind upstream (flyinghead/flycast). Key divergences:
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- NAOMI 2 has no separate BIOS entry or platform detection; NAOMI 2 games
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run as NAOMI using naomi.zip. Upstream has naomi2.zip with dedicated ROMs.
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- System SP is not supported. Upstream has segasp.zip support.
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- The n2_ prefix for NAOMI 2 flat boot ROMs is dead code (DC_PLATFORM_NAOMI2
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is never assigned to settings.System in the libretro port).
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- Flash search includes legacy names (%flash_wb.bin, %flash.bin, %flash.bin.bin)
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that upstream has removed.
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- NAOMI flat boot ROM search includes epr-21576d.bin fallback not in upstream.
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BIOS file search uses prefix + name pattern. The libretro port appends "dc/"
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to the system directory (core/libretro/libretro.cpp:1972). All files below are relative
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to system_dir/dc/.
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The prefix is determined by platform (core/hw/holly/sb_mem.cpp:32-49):
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Dreamcast -> dc_
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Dev Unit -> hkt_
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NAOMI -> naomi_
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Atomiswave -> (no prefix, BIOS loaded from awbios.zip)
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Boot ROM search pattern (core/hw/holly/sb_mem.cpp:51-68):
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{prefix}boot.bin, {prefix}boot.bin.bin, {prefix}bios.bin, {prefix}bios.bin.bin
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NAOMI also tries: epr-21576d.bin (core/hw/holly/sb_mem.cpp:59)
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Flash/NVRAM search pattern (core/hw/holly/sb_mem.cpp:231):
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{prefix}nvmem.bin, {prefix}flash_wb.bin, {prefix}flash.bin, {prefix}flash.bin.bin
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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 naomi_LoadBios is only ever called with
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that field or the literal naomi, so neither archive is opened.
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ref: core/hw/naomi/naomi_cart.cpp:79,229-240,476-479, core/hw/naomi/naomi_roms.h:79,191
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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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path: "dc/dc_boot.bin"
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aliases: ["dc_bios.bin", "dc_boot.bin.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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size: 2097152
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note: "Dreamcast boot ROM. HLE BIOS (reios) used as fallback. Code searches prefix + boot.bin, boot.bin.bin, bios.bin, bios.bin.bin sequentially."
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source_ref: "core/hw/holly/sb_mem.cpp:219,55-57"
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- name: "dc_nvmem.bin"
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path: "dc/dc_nvmem.bin"
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aliases: ["dc_flash_wb.bin", "dc_flash.bin", "dc_flash.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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size: 131072
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note: "Dreamcast flash memory / NVRAM. Created if not found. Code searches prefix + nvmem.bin, flash_wb.bin, flash.bin, flash.bin.bin sequentially."
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source_ref: "core/hw/holly/sb_mem.cpp:231,196-213"
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- name: "font.bin"
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path: "dc/font.bin"
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system: sega-dreamcast
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required: false
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note: "Dreamcast system font for HLE BIOS text rendering. Built-in font used as fallback."
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source_ref: "core/reios/reios.cpp:737-753"
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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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path: "dc/naomi_boot.bin"
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aliases: ["naomi_bios.bin", "naomi_boot.bin.bin", "naomi_bios.bin.bin", "epr-21576d.bin"]
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system: sega-naomi
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required: false
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size: 2097152
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note: "NAOMI boot ROM (flat binary). Alternative to naomi.zip. epr-21576d.bin is searched without prefix."
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source_ref: "core/hw/holly/sb_mem.cpp:219,58-59"
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- name: "naomi.zip"
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path: "dc/naomi.zip"
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system: sega-naomi
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required: true
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note: >
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NAOMI system BIOS archive (MAME format). Contains region-specific
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BIOS ROMs: epr-21576h.ic27 (Japan), epr-21577h.ic27 (USA),
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epr-21578h.ic27 (Export), epr-21579d.ic27 (Korea).
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Also used for NAOMI 2 games in the libretro port (no separate naomi2.zip).
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source_ref: "core/hw/naomi/naomi_roms.h:133-188"
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- name: "f355bios.zip"
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path: "dc/f355bios.zip"
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system: sega-naomi
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required: false
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note: "Ferrari F355 Challenge BIOS. Japan/USA/Export variants."
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source_ref: "core/hw/naomi/naomi_roms.h:96-103"
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- name: "f355dlx.zip"
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path: "dc/f355dlx.zip"
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system: sega-naomi
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required: false
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note: "Ferrari F355 Challenge Deluxe BIOS. Japan/USA/Export variants."
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source_ref: "core/hw/naomi/naomi_roms.h:105-119"
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- name: "hod2bios.zip"
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path: "dc/hod2bios.zip"
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system: sega-naomi
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required: false
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note: "House of the Dead 2 BIOS. Japan/USA/Export variants."
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source_ref: "core/hw/naomi/naomi_roms.h:121-131"
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# -------------------------------------------------------
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# Sega Atomiswave
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# -------------------------------------------------------
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- name: "awbios.zip"
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path: "dc/awbios.zip"
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system: sega-atomiswave
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required: true
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note: "Atomiswave system BIOS archive (MAME format). Contains bios0.ic23 (Sammy, 128 KB)."
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source_ref: "core/hw/naomi/naomi_roms.h:87-94"
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# -------------------------------------------------------
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# Not supported by libretro port
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# -------------------------------------------------------
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# naomi2.zip: no BIOS[] entry in libretro fork (naomi_roms.h). NAOMI 2 games
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# use the "naomi" BIOS. naomi_cart_GetSystemType() never returns
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# DC_PLATFORM_NAOMI2. Upstream has full naomi2.zip support.
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#
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# segasp.zip: no System SP support in libretro fork. Upstream has full support.
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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/nullDC.cpp:333-345"
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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/nullDC.cpp:346-354"
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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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hle_available: false
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note: "Treated as NAOMI in the libretro port. Separate platform only in upstream."
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source_ref: "core/nullDC.cpp:355-363"
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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/nullDC.cpp:364-375"
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