{ "count": 1, "generated_at": "2026-10-20T02:57:31Z", "items": [ { "id": "flycast2021", "profile": { "core_classification": "frozen_snapshot", "core_version": "0.1", "cores": [ "flycast2021" ], "display_name": "Sega - Dreamcast/Naomi (Flycast 2021)", "emulator": "Flycast 2021", "files": [ { "aliases": [ "dc_boot.bin.bin", "dc_bios.bin", "dc_bios.bin.bin" ], "description": "Dreamcast boot ROM", "hle_fallback": true, "min_size": 2097152, "name": "dc_boot.bin", "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.", "path": "dc/dc_boot.bin", "required": false, "source_ref": "core/hw/holly/sb_mem.cpp:50-65, core/hw/holly/sb_mem.cpp:215-229, core/hw/flashrom/flashrom.h:54-67, core/nullDC.cpp:420-431", "system": "sega-dreamcast", "validation": [ "size" ] }, { "aliases": [ "dc_flash_wb.bin", "dc_flash.bin", "dc_flash.bin.bin" ], "description": "Dreamcast flash ROM", "min_size": 131072, "name": "dc_nvmem.bin", "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.", "path": "dc/dc_nvmem.bin", "required": false, "source_ref": "core/hw/holly/sb_mem.cpp:196-213, core/hw/holly/sb_mem.cpp:231, core/hw/holly/sb_mem.cpp:236-243, core/hw/holly/sb_mem.cpp:271-278", "system": "sega-dreamcast", "validation": [ "size" ] }, { "description": "Dreamcast system font for the HLE BIOS", "name": "font.bin", "note": "Read whole into the font table of the reios ROM image. Absent, a built-in font is copied there.", "path": "dc/font.bin", "required": false, "source_ref": "core/reios/reios.cpp:736-755", "system": "sega-dreamcast" }, { "category": "bios_zip", "contents": [ { "description": "Japan", "name": "epr-21576h.ic27", "size": 2097152 }, { "description": "Export", "name": "epr-21578h.ic27", "size": 2097152 }, { "description": "USA", "name": "epr-21577h.ic27", "size": 2097152 }, { "description": "Korea", "name": "epr-21579d.ic27", "size": 2097152 } ], "description": "NAOMI BIOS archive", "name": "naomi.zip", "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.", "path": "dc/naomi.zip", "required": true, "source_ref": "core/hw/naomi/naomi_roms.h:132-189, core/hw/naomi/naomi_cart.cpp:227-247, core/hw/naomi/naomi_cart.cpp:472-484", "system": "sega-naomi" }, { "category": "bios_zip", "contents": [ { "name": "bios0.ic23", "size": 131072 } ], "description": "Atomiswave BIOS archive", "name": "awbios.zip", "note": "Named by all 34 Atomiswave games. Loaded into the flash chip, whose writable part is then reloaded from the save directory.", "path": "dc/awbios.zip", "required": true, "source_ref": "core/hw/naomi/naomi_roms.h:86-94, core/hw/naomi/naomi_cart.cpp:89-92, core/hw/naomi/naomi_cart.cpp:171-173", "system": "sega-atomiswave" }, { "category": "bios_zip", "contents": [ { "description": "Export", "name": "epr-22851.ic27", "size": 2097152 }, { "description": "USA", "name": "epr-22850.ic27", "size": 2097152 }, { "description": "Japan", "name": "epr-22849.ic27", "size": 2097152 } ], "description": "Ferrari F355 Challenge BIOS archive", "name": "f355bios.zip", "note": "Named by three Ferrari F355 Challenge entries, which refuse to start without it.", "path": "dc/f355bios.zip", "required": true, "source_ref": "core/hw/naomi/naomi_roms.h:95-103, core/hw/naomi/naomi_cart.cpp:238-243", "system": "sega-naomi" }, { "category": "bios_zip", "contents": [ { "description": "Export", "name": "epr-21864.ic27", "size": 2097152 }, { "description": "USA", "name": "epr-21863.ic27", "size": 2097152 }, { "description": "Japan", "name": "epr-21862.ic27", "size": 2097152 } ], "description": "Ferrari F355 Challenge Deluxe BIOS archive", "name": "f355dlx.zip", "note": "Named by the f355 entry, which refuses to start without it.", "path": "dc/f355dlx.zip", "required": true, "source_ref": "core/hw/naomi/naomi_roms.h:104-119, core/hw/naomi/naomi_roms.h:1701, core/hw/naomi/naomi_cart.cpp:238-243", "system": "sega-naomi" }, { "category": "bios_zip", "contents": [ { "description": "Export", "name": "epr-21331.ic27", "size": 2097152 }, { "description": "USA", "name": "epr-21330.ic27", "size": 2097152 }, { "description": "Japan", "name": "epr-21329.ic27", "size": 2097152 } ], "description": "The House of the Dead 2 BIOS archive", "name": "hod2bios.zip", "note": "Named by four House of the Dead 2 entries, which refuse to start without it.", "path": "dc/hod2bios.zip", "required": true, "source_ref": "core/hw/naomi/naomi_roms.h:120-131, core/hw/naomi/naomi_cart.cpp:238-243", "system": "sega-naomi" } ], "notes": "The libretro/flycast tree as of April 2022 (merge base 4c293f30), from before\nthe libretro fork was rebased on flyinghead's Flycast, with 22 commits by\nmetallic77 on top that tune defaults and build flags for low-end handhelds.\nROCKNIX renames the core option prefix from reicast to flycast2021 and\ninstalls the library as flycast2021_libretro.so.\nref: core/libretro/libretro.cpp:2296-2300\n\nEvery system file lives in /dc/.\nref: core/libretro/libretro.cpp:1893-1896\n\nDreamcast: the boot ROM is looked for as dc_boot.bin, dc_boot.bin.bin,\ndc_bios.bin, dc_bios.bin.bin, the first that yields a full 2 MB read wins.\nThe HLE BIOS core option (hle_bios) defaults to enabled, and when it is on, or\nwhen no boot ROM loads, reios boots the disc instead. Booting to the BIOS menu,\nor starting without a disc, needs the real boot ROM and fails with -3 without\nit.\nref: core/hw/holly/sb_mem.cpp:32-65, core/hw/holly/sb_mem.cpp:215-233,\n core/hw/flashrom/flashrom.h:54-67, core/hw/flashrom/flashrom.h:84-118,\n core/nullDC.cpp:420-431, core/nullDC.cpp:455-463,\n core/libretro/libretro_core_options.h:133-145, core/libretro/libretro.cpp:726-731\n\nNAOMI and Atomiswave: a BIOS archive is opened as /dc/ with .7z\nthen .zip appended. Each member is looked for in the game archive, its parent,\nthen the BIOS archive, by CRC32 and then by name. The BIOS table carries no\nCRC32, so only the name matches. The member for the configured region is\ntried first, then the first member listed. A game whose table entry names a\nBIOS refuses to start without it, and the others default to naomi. Five archive\nnames are reachable from the game table: naomi, awbios, f355bios, f355dlx,\nhod2bios. airlbios and naomigd have table entries but no game names them.\nref: core/hw/naomi/naomi_cart.cpp:76-176, core/hw/naomi/naomi_cart.cpp:227-247,\n core/archive/archive.cpp:26-42, core/hw/naomi/naomi_roms.h:76-217\n\nLoadRomFiles also reads naomi_boot.bin, naomi_boot.bin.bin, naomi_bios.bin,\nnaomi_bios.bin.bin and epr-21576d.bin for NAOMI, but naomi_cart_Close clears\nbios_loaded before the cartridge loads, so that file never stands in for\nnaomi.zip.\nref: core/hw/holly/sb_mem.cpp:59, core/hw/naomi/naomi_cart.cpp:427-444,\n core/hw/naomi/naomi_cart.cpp:472-484\n", "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.", "profiled_date": "2026-10-17", "source": "https://github.com/metallic77/flycast", "source_commit": "603814c9f73b773c455d9a497f389d2f93a257fd", "systems": [ "sega-dreamcast", "sega-naomi", "sega-atomiswave" ], "type": "libretro", "upstream": "https://github.com/libretro/flycast", "upstream_commit": "4c293f306bc16a265c2d768af5d0cea138426054" } } ], "kind": "emulators", "schema_version": 1 }