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refactor: remove false aliases from pcsx2 and melonds profiles
aliases must be same-SHA1 alternative names, not distinct files. pcsx2: 164 different BIOS dumps are separate DB entries, not aliases. melonds: 6 regional NAND dumps are separate DB entries, not aliases. also cleans pcsx2 non-standard fields, fixes display_name.
This commit is contained in:
Abdessamad Derraz
@@ -1,219 +1,73 @@
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# PCSX2 emulator BIOS profile
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# Generated from source analysis of https://github.com/PCSX2/pcsx2
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# Commit analyzed: HEAD as of 2026-03-17
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emulator: PCSX2
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type: standalone
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core_classification: official_port
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source: "https://github.com/PCSX2/pcsx2"
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logo: "https://raw.githubusercontent.com/PCSX2/pcsx2/master/pcsx2-qt/resources/icons/PCSX2logo.svg"
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profiled_date: "2026-03-18"
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upstream: "https://github.com/PCSX2/pcsx2"
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cores:
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- pcsx2
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profiled_date: "2026-03-30"
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core_version: "Git"
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display_name: "Sony - PlayStation 2 (LRPS2)"
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display_name: "Sony - PlayStation 2 (PCSX2)"
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systems: [sony-playstation-2]
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bios_directory: "bios/"
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bios_detection: "romdir" # scans romdir structure inside binary, looks for RESET/ROMVER/EXTINFO entries
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bios_selection: "automatic" # scans all files in bios dir matching 4-8 MB size, validates via romdir
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validation:
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method: "romdir_parse"
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min_size: 4194304 # 4 MB (MIN_BIOS_SIZE = 4 * _1mb)
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max_size: 8388608 # 8 MB (MAX_BIOS_SIZE = 8 * _1mb)
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required_entries: ["RESET", "ROMVER"]
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optional_entries: ["EXTINFO"]
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note: "Any file in bios/ between 4-8 MB with valid romdir containing RESET+ROMVER is accepted"
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regions:
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J: {zone: "Japan", id: 0}
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A: {zone: "USA", id: 1}
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E: {zone: "Europe", id: 2}
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H: {zone: "Asia", id: 4}
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C: {zone: "China", id: 6}
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T: {zone: "T10K/COH-H", id: 8}
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X: {zone: "Test", id: 9}
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P: {zone: "Free", id: 10}
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notes: |
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Filename-agnostic BIOS detection. Scans bios/ for any file between 4-8 MB
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with valid romdir structure (RESET + ROMVER entries). No hash validation.
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Companion files (.rom1, .rom2, .nvm, .mec) derive paths from selected BIOS.
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ROM1 (DVD player) and ROM2 (Chinese extension) silently skipped if missing.
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NVM and MEC auto-created with defaults if missing.
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files:
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# -- Main BIOS binary (required) --
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- name: "<user-selected>.bin"
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pattern: "*"
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- name: ps2-0230a-20080220.bin
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required: true
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size_range: "4MB-8MB"
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source_ref: "pcsx2/ps2/BiosTools.cpp:258-282"
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note: >
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PCSX2 does not mandate a specific filename. It scans the entire bios/ directory
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for any file between 4-8 MB that contains a valid romdir structure (RESET + ROMVER entries).
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Common filenames follow the SCPH-XXXXX_BIOS_VYYY_REGION_ZZZ.BIN convention but this is
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not enforced. The file is loaded into the 4 MB ROM region of EE memory.
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min_size: 4194304
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max_size: 8388608
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validation: [size]
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source_ref: "pcsx2/ps2/BiosTools.cpp:258-362"
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note: "Accepts any file 4-8 MB with valid romdir (RESET + ROMVER). Naming convention ps2-VVVVr-YYYYMMDD.bin (version, region, date)."
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# -- ROM1 (optional, DVD player) --
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- name: "<biosname>.rom1"
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pattern: "{biosname}.rom1 or {biosbase}.rom1"
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- name: rom1.bin
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required: false
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max_size: 4194304 # 4 MB (Ps2MemSize::Rom1)
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source_ref: "pcsx2/ps2/BiosTools.cpp:214-241"
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note: >
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DVD player ROM. Loaded via LoadExtraRom("rom1"). PCSX2 tries two naming patterns:
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1) Full bios path + ".rom1" appended (e.g. scph70004.bin.rom1)
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2) Bios path with extension replaced (e.g. scph70004.rom1)
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Mapped to EE memory at ROM1 region (0x1FC00000 + 4MB offset).
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Contains DVD player and region detection data (DVDID).
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max_size: 4194304
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source_ref: "pcsx2/ps2/BiosTools.cpp:214-241,366"
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note: "DVD player ROM. Tries {biospath}.rom1 then {biosbase}.rom1. Silently skipped if missing."
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# -- ROM2 (optional, Chinese ROM extension) --
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- name: "<biosname>.rom2"
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pattern: "{biosname}.rom2 or {biosbase}.rom2"
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- name: ROM2.BIN
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required: false
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max_size: 4194304 # 4 MB (Ps2MemSize::Rom2)
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source_ref: "pcsx2/ps2/BiosTools.cpp:214-241"
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note: >
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Chinese ROM extension. Loaded via LoadExtraRom("rom2"). Same naming convention
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as rom1: tries appended extension first, then replaced extension.
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Only present on Chinese region consoles.
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max_size: 4194304
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source_ref: "pcsx2/ps2/BiosTools.cpp:214-241,367"
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note: "Chinese ROM extension. Same naming convention as rom1. Only present on Chinese region consoles."
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# -- NVM / NVRAM (optional, auto-created) --
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- name: "<biosname>.nvm"
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pattern: "{biosbase}.nvm"
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- name: EROM.BIN
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required: false
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source_ref: "pcsx2/ps2/BiosTools.cpp"
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note: "Extended ROM. Present in some BIOS dumps but not loaded by PCSX2 code via LoadExtraRom."
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path: null
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- name: eeprom.dat
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required: false
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hle_fallback: true
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size: 1024 # NVRAM_SIZE = 1024 bytes
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source_ref: "pcsx2/CDVD/CDVD.cpp:160-238"
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note: >
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EEPROM / NVRAM data. Path derived from BiosPath with extension replaced to ".nvm"
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(cdvdGetNVRAMPath). Contains console configuration: language, timezone, iLink ID,
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region parameters, OSD settings. Auto-created with defaults if missing.
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Two NVM layouts exist: v0.00+ (biosVer 0x000) and v1.70+ (biosVer 0x146).
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# -- MEC file (optional, auto-created) --
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- name: "<biosname>.mec"
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pattern: "{biosbase}.mec"
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required: false
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hle_fallback: true
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size: 4 # u32 s_mecha_version
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source_ref: "pcsx2/CDVD/CDVD.cpp:190-204"
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note: >
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Mechacon (mechanism controller) version file. 4 bytes containing the mecha version
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as a u32 value. Auto-created with DEFAULT_MECHA_VERSION (0x00020603) if missing.
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Path derived from BiosPath with extension replaced to ".mec".
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# -- IRX override (optional, advanced) --
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- name: "<custom>.irx"
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pattern: "*.irx"
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required: false
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source_ref: "pcsx2/ps2/BiosTools.cpp:243-256,384-385"
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note: >
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Custom IOP Reboot eXecutable module. Loaded into ROM at offset 0x3C0000 if
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EmuConfig.CurrentIRX is set (path length > 3). Injected at IOP reset (PC=0x1630).
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Used for debugging/development, not needed for normal operation.
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# -- DEV9 EEPROM (optional, network adapter) --
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- name: "eeprom.dat"
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required: false
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hle_fallback: true
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size: 64 # 64 bytes, mmap'd
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size: 64
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source_ref: "pcsx2/DEV9/DEV9.cpp:110-160"
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note: >
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DEV9 (network adapter / HDD expansion bay) EEPROM data. Fixed filename "eeprom.dat"
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opened from working directory. Contains network adapter configuration.
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Falls back to built-in defaults if file not found. Only relevant when using
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DEV9 features (online play, HDD).
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note: "DEV9 network adapter EEPROM. Falls back to built-in defaults if missing."
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common_bios_filenames:
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# Japan
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- "SCPH-10000_BIOS_V1_JAP_100.BIN"
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- "SCPH-15000_BIOS_V3_JAP_120.BIN"
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- "SCPH-30000_BIOS_V4_JAP_150.BIN"
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- "SCPH-30001R_BIOS_V7_JAP_160.BIN"
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- "SCPH-30004R_BIOS_V7_JAP_160.BIN"
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- "SCPH-35000_BIOS_V5_JAP_160.BIN"
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- "SCPH-50000_BIOS_V9_JAP_170.BIN"
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- "SCPH-50004_BIOS_V9_JAP_170.BIN"
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- "SCPH-70000_BIOS_V12_JAP_200.BIN"
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- "SCPH-75000_BIOS_V14_JAP_220.BIN"
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- "SCPH-77000_BIOS_V14_JAP_220.BIN"
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- "SCPH-90000_BIOS_V18_JAP_230.BIN"
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# USA
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- "SCPH-30001_BIOS_V4_USA_150.BIN"
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- "SCPH-39001_BIOS_V6_USA_160.BIN"
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- "SCPH-50001_BIOS_V9_USA_170.BIN"
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- "SCPH-50003_BIOS_V9_USA_170.BIN"
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- "SCPH-70002_BIOS_V12_USA_200.BIN"
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- "SCPH-70004_BIOS_V12_USA_200.BIN"
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- "SCPH-70012_BIOS_V12_USA_200.BIN"
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- "SCPH-75001_BIOS_V14_USA_220.BIN"
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- "SCPH-77001_BIOS_V14_USA_220.BIN"
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- "SCPH-90001_BIOS_V18_USA_230.BIN"
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# Europe
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- "SCPH-30002_BIOS_V4_EUR_150.BIN"
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- "SCPH-30003_BIOS_V4_EUR_150.BIN"
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- "SCPH-30004_BIOS_V4_EUR_150.BIN"
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- "SCPH-39002_BIOS_V6_EUR_160.BIN"
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- "SCPH-39003_BIOS_V6_EUR_160.BIN"
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- "SCPH-39004_BIOS_V6_EUR_160.BIN"
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- "SCPH-50002_BIOS_V9_EUR_170.BIN"
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- "SCPH-50004_BIOS_V9_EUR_170.BIN"
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- "SCPH-70002_BIOS_V12_EUR_200.BIN"
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- "SCPH-70003_BIOS_V12_EUR_200.BIN"
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- "SCPH-70004_BIOS_V12_EUR_200.BIN"
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- "SCPH-70008_BIOS_V12_EUR_200.BIN"
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- "SCPH-75002_BIOS_V14_EUR_220.BIN"
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- "SCPH-75003_BIOS_V14_EUR_220.BIN"
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- "SCPH-75004_BIOS_V14_EUR_220.BIN"
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- "SCPH-77002_BIOS_V14_EUR_220.BIN"
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- "SCPH-77003_BIOS_V14_EUR_220.BIN"
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- "SCPH-77004_BIOS_V14_EUR_220.BIN"
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- "SCPH-90002_BIOS_V18_EUR_230.BIN"
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- "SCPH-90003_BIOS_V18_EUR_230.BIN"
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- "SCPH-90004_BIOS_V18_EUR_230.BIN"
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# Asia
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- "SCPH-50009_BIOS_V9_HK_170.BIN"
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- "SCPH-70005_BIOS_V12_HK_200.BIN"
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- "SCPH-70006_BIOS_V12_HK_200.BIN"
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- "SCPH-70008_BIOS_V12_HK_200.BIN"
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# China
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- "SCPH-50009_BIOS_V9_CHN_170.BIN"
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- "SCPH-70006_BIOS_V12_CHN_200.BIN"
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- name: GameIndex.yaml
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path: pcsx2/resources/GameIndex.yaml
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required: false
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mode: libretro
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source_ref: "pcsx2/GameDatabase.cpp:48,880"
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note: "Game compatibility database. OSD warning if missing."
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memory_layout:
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ROM: {offset: "0x1FC00000", size: "4 MB", purpose: "Main BIOS binary"}
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ROM1: {offset: "ROM + 4MB", size: "4 MB", purpose: "DVD player"}
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ROM2: {offset: "ROM + 8MB", size: "4 MB", purpose: "Chinese ROM extension"}
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- name: cheats_ws.zip
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path: pcsx2/resources/cheats_ws.zip
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required: false
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mode: libretro
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source_ref: "pcsx2/VMManager.cpp:340-353"
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note: "Widescreen patches archive."
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nvm_layout:
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format_0:
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applies_to: "BIOS v0.00+"
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biosVer: 0x000
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config0: 0x280
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config1: 0x300
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config2: 0x200
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consoleId: 0x1C8
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ilinkId: 0x1C0
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modelNum: 0x1A0
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regparams: 0x180
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mac: 0x198
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format_1:
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applies_to: "BIOS v1.70+"
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biosVer: 0x146
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config0: 0x270
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config1: 0x2B0
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config2: 0x200
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consoleId: 0x1F0
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ilinkId: 0x1E0
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modelNum: 0x1B0
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regparams: 0x180
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mac: 0x198
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notes: |
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PCSX2 is filename-agnostic for the main BIOS. Detection relies on romdir structure
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parsing inside the binary itself, not on filename or extension. Any file between 4-8 MB
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with a valid romdir (containing at least RESET and ROMVER entries) is accepted.
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The ROMVER entry encodes: version (2+2 digits), region letter, console/devel flag,
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build date (YYYYMMDD), and is used to determine the BIOS description and region.
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Companion files (.nvm, .mec) are auto-created with sane defaults if missing.
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ROM1/ROM2 are silently skipped if not found - only the main BIOS binary is strictly required.
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PCSX2 no longer ships as a libretro core in official builds. The standalone emulator
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is the primary distribution channel.
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Devel console BIOSes (< ~2.3 MB) lack the OSD and are handled with NoOSD=true flag.
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- name: cheats_ni.zip
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path: pcsx2/resources/cheats_ni.zip
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required: false
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mode: libretro
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source_ref: "pcsx2/VMManager.cpp:375-388"
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note: "No-interlacing patches archive."
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