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.
181 lines
7.6 KiB
YAML
181 lines
7.6 KiB
YAML
emulator: "Flycast 2021"
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type: libretro
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core_classification: frozen_snapshot
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source: "https://github.com/metallic77/flycast"
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upstream: "https://github.com/libretro/flycast"
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profiled_date: "2026-10-17"
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source_commit: "603814c9f73b773c455d9a497f389d2f93a257fd"
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upstream_commit: "4c293f306bc16a265c2d768af5d0cea138426054"
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pin_frozen: "ROCKNIX 20261001 builds this revision. No branch of metallic77/flycast holds it any more: master was put back on the libretro merge base 4c293f30, so HEAD is the code before the fork's own commits."
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core_version: "0.1"
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display_name: "Sega - Dreamcast/Naomi (Flycast 2021)"
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cores:
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- "flycast2021"
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systems:
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- sega-dreamcast
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- sega-naomi
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- sega-atomiswave
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notes: |
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The libretro/flycast tree as of April 2022 (merge base 4c293f30), from before
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the libretro fork was rebased on flyinghead's Flycast, with 22 commits by
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metallic77 on top that tune defaults and build flags for low-end handhelds.
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ROCKNIX renames the core option prefix from reicast to flycast2021 and
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installs the library as flycast2021_libretro.so.
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ref: core/libretro/libretro.cpp:2296-2300
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Every system file lives in <system>/dc/.
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ref: core/libretro/libretro.cpp:1893-1896
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Dreamcast: the boot ROM is looked for as dc_boot.bin, dc_boot.bin.bin,
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dc_bios.bin, dc_bios.bin.bin, the first that yields a full 2 MB read wins.
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The HLE BIOS core option (hle_bios) defaults to enabled, and when it is on, or
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when no boot ROM loads, reios boots the disc instead. Booting to the BIOS menu,
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or starting without a disc, needs the real boot ROM and fails with -3 without
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it.
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ref: core/hw/holly/sb_mem.cpp:32-65, core/hw/holly/sb_mem.cpp:215-233,
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core/hw/flashrom/flashrom.h:54-67, core/hw/flashrom/flashrom.h:84-118,
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core/nullDC.cpp:420-431, core/nullDC.cpp:455-463,
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core/libretro/libretro_core_options.h:133-145, core/libretro/libretro.cpp:726-731
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NAOMI and Atomiswave: a BIOS archive is opened as <system>/dc/<name> with .7z
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then .zip appended. Each member is looked for in the game archive, its parent,
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then the BIOS archive, by CRC32 and then by name. The BIOS table carries no
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CRC32, so only the name matches. The member for the configured region is
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tried first, then the first member listed. A game whose table entry names a
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BIOS refuses to start without it, and the others default to naomi. Five archive
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names are reachable from the game table: naomi, awbios, f355bios, f355dlx,
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hod2bios. airlbios and naomigd have table entries but no game names them.
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ref: core/hw/naomi/naomi_cart.cpp:76-176, core/hw/naomi/naomi_cart.cpp:227-247,
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core/archive/archive.cpp:26-42, core/hw/naomi/naomi_roms.h:76-217
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LoadRomFiles also reads naomi_boot.bin, naomi_boot.bin.bin, naomi_bios.bin,
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naomi_bios.bin.bin and epr-21576d.bin for NAOMI, but naomi_cart_Close clears
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bios_loaded before the cartridge loads, so that file never stands in for
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naomi.zip.
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ref: core/hw/holly/sb_mem.cpp:59, core/hw/naomi/naomi_cart.cpp:427-444,
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core/hw/naomi/naomi_cart.cpp:472-484
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files:
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- name: "dc_boot.bin"
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path: "dc/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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description: "Dreamcast boot ROM"
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note: "Read as 2 MB into the system ROM, and a shorter file is rejected. Needed only to boot to the BIOS menu or when the HLE BIOS option is disabled."
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source_ref: "source core/hw/holly/sb_mem.cpp:50-65, source core/hw/holly/sb_mem.cpp:215-229, source core/hw/flashrom/flashrom.h:54-67, source core/nullDC.cpp:420-431"
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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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min_size: 131072
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validation: [size]
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description: "Dreamcast flash ROM"
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note: "Loaded with the boot ROM and by the HLE path. A missing file leaves the flash blank and the core runs. Written back as dc_nvmem.bin."
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source_ref: "source core/hw/holly/sb_mem.cpp:196-213, source core/hw/holly/sb_mem.cpp:231, source core/hw/holly/sb_mem.cpp:236-243, source core/hw/holly/sb_mem.cpp:271-278"
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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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description: "Dreamcast system font for the HLE BIOS"
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note: "Read whole into the font table of the reios ROM image. Absent, a built-in font is copied there."
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source_ref: "source core/reios/reios.cpp:736-755"
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- name: "naomi.zip"
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path: "dc/naomi.zip"
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category: bios_zip
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system: sega-naomi
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required: true
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description: "NAOMI BIOS archive"
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note: "Default BIOS of every NAOMI game whose table entry names none, cartridge, .lst, .bin and .dat images alike. One member is loaded: the one for the configured region, else epr-21576h.ic27."
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source_ref: "source core/hw/naomi/naomi_roms.h:132-189, upstream core/hw/naomi/naomi_cart.cpp:227-247, upstream core/hw/naomi/naomi_cart.cpp:472-484"
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contents:
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- name: "epr-21576h.ic27"
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size: 2097152
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description: "Japan"
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- name: "epr-21578h.ic27"
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size: 2097152
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description: "Export"
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- name: "epr-21577h.ic27"
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size: 2097152
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description: "USA"
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- name: "epr-21579d.ic27"
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size: 2097152
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description: "Korea"
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- name: "awbios.zip"
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path: "dc/awbios.zip"
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category: bios_zip
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system: sega-atomiswave
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required: true
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description: "Atomiswave BIOS archive"
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note: "Named by all 34 Atomiswave games. Loaded into the flash chip, whose writable part is then reloaded from the save directory."
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source_ref: "source core/hw/naomi/naomi_roms.h:86-94, source core/hw/naomi/naomi_cart.cpp:89-92, source core/hw/naomi/naomi_cart.cpp:171-173"
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contents:
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- name: "bios0.ic23"
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size: 131072
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- name: "f355bios.zip"
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path: "dc/f355bios.zip"
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category: bios_zip
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system: sega-naomi
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required: true
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description: "Ferrari F355 Challenge BIOS archive"
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note: "Named by three Ferrari F355 Challenge entries, which refuse to start without it."
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source_ref: "source core/hw/naomi/naomi_roms.h:95-103, source core/hw/naomi/naomi_cart.cpp:238-243"
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contents:
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- name: "epr-22851.ic27"
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size: 2097152
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description: "Export"
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- name: "epr-22850.ic27"
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size: 2097152
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description: "USA"
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- name: "epr-22849.ic27"
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size: 2097152
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description: "Japan"
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- name: "f355dlx.zip"
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path: "dc/f355dlx.zip"
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category: bios_zip
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system: sega-naomi
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required: true
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description: "Ferrari F355 Challenge Deluxe BIOS archive"
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note: "Named by the f355 entry, which refuses to start without it."
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source_ref: "source core/hw/naomi/naomi_roms.h:104-119, upstream core/hw/naomi/naomi_roms.h:1701, source core/hw/naomi/naomi_cart.cpp:238-243"
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contents:
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- name: "epr-21864.ic27"
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size: 2097152
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description: "Export"
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- name: "epr-21863.ic27"
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size: 2097152
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description: "USA"
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- name: "epr-21862.ic27"
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size: 2097152
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description: "Japan"
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- name: "hod2bios.zip"
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path: "dc/hod2bios.zip"
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category: bios_zip
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system: sega-naomi
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required: true
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description: "The House of the Dead 2 BIOS archive"
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note: "Named by four House of the Dead 2 entries, which refuse to start without it."
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source_ref: "source core/hw/naomi/naomi_roms.h:120-131, source core/hw/naomi/naomi_cart.cpp:238-243"
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contents:
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- name: "epr-21331.ic27"
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size: 2097152
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description: "Export"
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- name: "epr-21330.ic27"
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size: 2097152
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description: "USA"
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- name: "epr-21329.ic27"
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size: 2097152
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description: "Japan"
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