mirror of
https://github.com/Abdess/retroarch_system.git
synced 2026-10-23 20:29:06 -05:00
Abdessamad Derraz
cc550c21e7
These refs were labelled upstream but land in the port at source_commit: flycast sb_mem.cpp:55-59,196-231, reios.cpp:737 and naomi_roms.h:87-94 in libretro/flycast@bde196bf (filestream_open, get_rom_names), lrps2 BiosTools.cpp:189-229,339-340 and CDVD.cpp:196-245 in libretro/ps2@6eabf224 (RETRO_VFS reads absent from PCSX2), mesence bios.col at FirmwareTypeExtensions.cs:70 in MesenCE@20f497c9 (line 62 in Mesen2).
330 lines
11 KiB
YAML
330 lines
11 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/flyinghead/flycast"
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logo: "https://raw.githubusercontent.com/flyinghead/flycast/master/shell/linux/flycast.png"
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profiled_date: "2026-10-21"
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source_commit: "34ad8c8262c82db237a8b9cee0d8046d9cdd6f78"
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core_version: "Git"
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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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- sega-systemsp
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notes: |
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The libretro core is built from flyinghead/flycast, the same tree as the
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standalone emulator: the wrapper lives in shell/libretro and is compiled
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with -DLIBRETRO=ON.
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Flycast has a built-in HLE BIOS (reios) for Dreamcast that boots most
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games without a real boot ROM. A short list of product ids forces the
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real BIOS (core/emulator.cpp:277-278) and is told "This game requires a
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real BIOS" when it is absent (core/emulator.cpp:616-621). Without content,
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the core boots the BIOS and fails when none is found
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(core/emulator.cpp:601-605). Arcade systems (NAOMI, NAOMI 2, Atomiswave,
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System SP) load MAME-format BIOS archives.
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The libretro port appends "dc/" to the system directory
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(shell/libretro/libretro.cpp:2249-2250). All files below are relative to
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system_dir/dc/.
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Only the Dreamcast reads flat files. The prefix is dc_ for Dreamcast
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(core/hw/flashrom/nvmem.cpp:35-50), and the boot ROM is searched as
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{prefix}boot.bin then {prefix}bios.bin (core/hw/flashrom/nvmem.cpp:304).
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Flash is {prefix}nvmem.bin and is created when absent
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(core/hw/flashrom/nvmem.cpp:252-256). Arcade platforms return before the
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boot ROM search (core/hw/flashrom/nvmem.cpp:300-302), and their flash is a
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per-game save file. The system font is a resource compiled into the
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binary (core/reios/reios.cpp:761-764).
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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:75-78), first in system_dir/dc, then in
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the content directory (shell/libretro/oslib.cpp:118-130). Each ROM inside
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is looked up by CRC, then by file name, in the game archive, its parent,
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then the BIOS archive (core/hw/naomi/naomi_cart.cpp:89-106). The blob of
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the configured region is mapped first, any region otherwise, and a game
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whose BIOS cannot be loaded aborts (core/hw/naomi/naomi_cart.cpp:196-207).
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Games whose bios field is naomi2 run as NAOMI 2 and those whose bios
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field is segasp as System SP (core/hw/naomi/naomi_cart.cpp:810-821).
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BIOS[] also declares naomidev and naomigd. No entry of Games[] carries
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either name in its bios field, so neither archive is opened. naomi-jp-d
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and naomi-ko-h read naomi.zip (core/hw/naomi/naomi_roms.cpp:219-242).
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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"]
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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. reios is used when it is absent, except for the product ids that force the real BIOS. Searched as dc_boot.bin then dc_bios.bin."
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source_ref: "core/hw/flashrom/nvmem.cpp:298-316, core/emulator.cpp:613-622"
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- name: "dc_nvmem.bin"
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path: "dc/dc_nvmem.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. Created with factory settings when absent, written back on exit."
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source_ref: "core/hw/flashrom/nvmem.cpp:252-256, core/hw/flashrom/nvmem.cpp:321-322"
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# -------------------------------------------------------
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# Sega NAOMI
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# -------------------------------------------------------
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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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category: bios_zip
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note: "NAOMI system BIOS archive. Games with no bios field or with naomi, naomi-jp-d or naomi-ko-h read it and abort without it."
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source_ref: "core/hw/naomi/naomi_roms.cpp:86-144, core/hw/naomi/naomi_roms.cpp:219-242, core/hw/naomi/naomi_cart.cpp:196-207"
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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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crc32: "d4895685"
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- name: "epr-21576g.ic27"
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description: Japan
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size: 2097152
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crc32: "d2a1c6bf"
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- name: "epr-21578h.ic27"
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description: Export
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size: 2097152
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crc32: "7b452946"
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- name: "epr-21578g.ic27"
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description: Export
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size: 2097152
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crc32: "55413214"
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- name: "epr-21577h.ic27"
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description: USA
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size: 2097152
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crc32: "fdf17452"
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- name: "epr-21577g.ic27"
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description: USA
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size: 2097152
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crc32: "25f64af7"
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- name: "epr-21579d.ic27"
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description: Korea
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size: 2097152
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crc32: "33513691"
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- name: "epr-21576h_multi.ic27"
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description: "Multi-region, the BIOS of naomi-ko-h"
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size: 2097152
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crc32: "cce01f1f"
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- name: "epr-21576d.ic27"
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description: "Japan, the BIOS of naomi-jp-d"
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size: 2097152
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crc32: "3b2afa7b"
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- name: "airlbios.zip"
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path: "dc/airlbios.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: "Airline Pilots Deluxe BIOS. Required by the two Airline Pilots entries."
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source_ref: "core/hw/naomi/naomi_roms.cpp:29-37, core/hw/naomi/naomi_roms.cpp:1000, core/hw/naomi/naomi_roms.cpp:1032"
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contents:
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- name: "epr-21802.ic27"
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description: Export
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size: 2097152
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crc32: "a77c6b1c"
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- name: "epr-21801.ic27"
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description: USA
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size: 2097152
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crc32: "a21bef24"
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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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category: bios_zip
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note: "Ferrari F355 Challenge twin BIOS. Required by the three twin entries."
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source_ref: "core/hw/naomi/naomi_roms.cpp:49-59, core/hw/naomi/naomi_roms.cpp:1887, core/hw/naomi/naomi_roms.cpp:1926, core/hw/naomi/naomi_roms.cpp:1965"
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contents:
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- name: "epr-22851.ic27"
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description: Export
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size: 2097152
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crc32: "62483677"
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- name: "epr-22850.ic27"
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description: USA
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size: 2097152
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crc32: "28aa539d"
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- name: "epr-22849.ic27"
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description: Japan
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size: 2097152
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crc32: "121e009c"
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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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category: bios_zip
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note: "Ferrari F355 Challenge deluxe BIOS. Required by f355."
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source_ref: "core/hw/naomi/naomi_roms.cpp:60-74, core/hw/naomi/naomi_roms.cpp:1843"
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contents:
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- name: "epr-21864.ic27"
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description: Export
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size: 2097152
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crc32: "12ed7c66"
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- name: "epr-21863.ic27"
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description: USA
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size: 2097152
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crc32: "0615a4d1"
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- name: "epr-21862.ic27"
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description: Japan
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size: 2097152
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crc32: "1f630716"
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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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category: bios_zip
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note: "The House of the Dead 2 BIOS. Required by the four hotd2 entries."
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source_ref: "core/hw/naomi/naomi_roms.cpp:75-85, core/hw/naomi/naomi_roms.cpp:2203, core/hw/naomi/naomi_roms.cpp:2241, core/hw/naomi/naomi_roms.cpp:2279, core/hw/naomi/naomi_roms.cpp:2317"
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contents:
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- name: "epr-21331.ic27"
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description: Export
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size: 2097152
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crc32: "065f8500"
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- name: "epr-21330.ic27"
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description: USA
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size: 2097152
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crc32: "9e3bfa1b"
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- name: "epr-21329.ic27"
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description: Japan
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size: 2097152
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crc32: "d99e5b9b"
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# -------------------------------------------------------
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# Sega NAOMI 2
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# -------------------------------------------------------
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- name: "naomi2.zip"
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path: "dc/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: "NAOMI 2 system BIOS archive. Every game whose bios field is naomi2 aborts without it."
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source_ref: "core/hw/naomi/naomi_roms.cpp:182-202, core/hw/naomi/naomi_cart.cpp:818-819, core/hw/naomi/naomi_cart.cpp:196-207"
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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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crc32: "297ea6ed"
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- name: "epr-23605b.ic27"
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description: Japan
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size: 2097152
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crc32: "3a3242d4"
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- name: "epr-23607c.ic27"
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description: USA
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size: 2097152
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crc32: "750e254b"
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- name: "epr-23607b.ic27"
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description: USA
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size: 2097152
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crc32: "f308c5e9"
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- name: "epr-23608c.ic27"
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description: Export
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size: 2097152
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crc32: "6ef1dd8e"
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- name: "epr-23608b.ic27"
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description: Export
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size: 2097152
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crc32: "a554b1e3"
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- name: "epr-23609b.ic27"
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description: Korea
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size: 2097152
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crc32: "99e3751f"
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- name: "epr-23605c_multi.ic27"
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description: Multi-region
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size: 2097152
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crc32: "353fdbcd"
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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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category: bios_zip
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note: "Atomiswave system BIOS archive. The first 64 KB of bios0.ic23 are mapped. Every Atomiswave game aborts without it."
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source_ref: "core/hw/naomi/naomi_roms.cpp:38-48, core/hw/naomi/naomi_cart.cpp:196-207"
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contents:
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- name: "bios0.ic23"
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size: 131072
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crc32: "719b2b0b"
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# -------------------------------------------------------
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# Sega System SP
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# -------------------------------------------------------
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- name: "segasp.zip"
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path: "dc/segasp.zip"
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system: sega-systemsp
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required: true
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category: bios_zip
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note: "System SP BIOS archive. The USA and Export regions also load a default motherboard EEPROM from it. Every game whose bios field is segasp aborts without it."
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source_ref: "core/hw/naomi/naomi_roms.cpp:203-218, core/hw/naomi/naomi_cart.cpp:820-821, core/hw/naomi/naomi_cart.cpp:126-139"
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contents:
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- name: "epr-24328a.ic50"
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size: 2097152
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crc32: "03ec3805"
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- name: "mb_eeprom_us.ic54s"
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description: USA
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size: 128
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crc32: "4186d7ab"
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- name: "mb_eeprom_exp.ic54s"
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description: Export
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size: 128
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crc32: "947ddfad"
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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:456-462"
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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:463-469"
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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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source_ref: "core/emulator.cpp:470-477"
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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:478-484"
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systemsp:
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bios_size: 2097152
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sram_size: 131072
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ram_size: 33554432
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hle_available: false
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source_ref: "core/emulator.cpp:485-491"
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