emulator: SUPER ZSNES
type: standalone
core_classification: other
source: "https://www.zsnes.com"
upstream: "https://www.zsnes.com"
profiled_date: "2026-08-08"
core_version: "v0.230b"
display_name: "Nintendo - SNES / SFC (SUPER ZSNES)"
cores:
  - superzsnes
  - SUPERZSNES
systems:
  - nintendo-snes
mode: standalone

notes: |
  Super Famicom emulator by zsKnight and _Demo_, written from scratch with a
  GPU-rendered PPU and unrelated to the ZSNES codebase. Shipped as binaries
  only, for Windows, macOS, Linux and Android; the desktop builds are Unity
  Mono, so the emulator is Assembly-CSharp.dll and the per-game tables are
  serialized into the level0 scene. The Windows and Linux 0.230b builds carry
  the same tables and the same emulation sources.

  One NEC uPD7725 interpreter serves every cartridge whose header declares a
  DSP. RomLoader.GetROMType reads the cartridge type byte at $FFD6 and returns
  COProcessorType.DSP when the low nibble is 3 to 6 and the high nibble is 0,
  or when the high nibble is F and the subtype byte at $FFBF is 1 or 2.
  MainMemoryMap.InitSpecialChips builds the DSP1 object for that type alone.
  The DSP1 constructor picks the filename from a table keyed on the CRC32 of
  the 21 raw header title bytes, taken as Latin-1 and re-encoded UTF-8,
  falling back to dsp1b.rom when no entry matches. Words are assembled little
  endian, 2048 24-bit program words from offset 0 then 1024 16-bit data words
  from offset 6144.

  Three locations are tried in order: the folder holding the loaded ROM, the
  Unity persistent data folder (ZEMU Software Inc./SUPERZSNES), then the
  folder holding the executable. None of them goes through the srm and bps
  path overrides. When all three miss, a "Need DSP ROM" dialog names the file
  and the chip runs on a zero-filled 8192-byte buffer.

  No other file is read. SA-1, SPC7110, S-RTC, Cx4, OBC-1, Super Game Boy and
  the ST01x and ST018 enum entries build no chip, the SPC700 IPL is a 64-byte
  array in CPUSPC700, and the enhancement data, the audio replacement data and
  testgame.smc are Unity resources inside the build. Save RAM, save states,
  cheats, bps patches and MSU-1 packs are all named after the loaded ROM.

files:
  # NEC uPD7725 microcode, program and data ROM in one file.
  # The name is chosen by CRC32 of the 21-byte header title; dsp1b.rom is the
  # default when no entry in the table matches.

  - name: "dsp1b.rom"
    aliases: ["SNES_dsp1b.rom"]
    system: nintendo-snes
    description: "NEC uPD7725 DSP-1B microcode"
    required: true
    size: 8192
    crc32: 465c4e1c
    validation: [crc32]
    source_ref: "Assets/Scripts/SpecialChips/DSP1.cs:88-89 (name and expected CRC32 1180454428), DSP1.cs:151-155 (compare, warn on mismatch), Assets/Scripts/SpecialChips/DSP1Core.cs:756-769 (8192-byte layout)"
    note: "Default for every DSP cartridge with no table entry, so it covers DSP-1 and DSP-1A titles as well. A mismatched CRC32 warns and the data is used anyway."

  - name: "dsp2.rom"
    aliases: ["SNES_dsp2.rom"]
    system: nintendo-snes
    description: "NEC uPD7725 DSP-2 microcode"
    required: true
    size: 8192
    source_ref: "Assets/Scripts/SpecialChips/DSP1.cs:98-114 (table lookup, no CRC32 check), SUPERZSNES_Data/level0 (VersionNo.dspDetections entry 1, title CRC32 0x84690f8b)"
    note: "Selected for header title 'DUNGEON MASTER' (Dungeon Master)."

  - name: "dsp3.rom"
    aliases: ["SNES_dsp3.rom"]
    system: nintendo-snes
    description: "NEC uPD7725 DSP-3 microcode"
    required: true
    size: 8192
    source_ref: "Assets/Scripts/SpecialChips/DSP1.cs:98-114 (table lookup, no CRC32 check), SUPERZSNES_Data/level0 (VersionNo.dspDetections entry 2, title CRC32 0xfa7f8076)"
    note: "Selected for the half-width katakana header title of SD Gundam GX, 'SD' then $B6 $DE $DD $C0 $DE $D1 then 'GX'."

  - name: "dsp4.rom"
    aliases: ["SNES_dsp4.rom"]
    system: nintendo-snes
    description: "NEC uPD7725 DSP-4 microcode"
    required: true
    size: 8192
    source_ref: "Assets/Scripts/SpecialChips/DSP1.cs:98-114 (table lookup, no CRC32 check), SUPERZSNES_Data/level0 (VersionNo.dspDetections entry 3, title CRC32 0x42578645)"
    note: "Selected for header title 'TOP GEAR 3000' (Top Gear 3000)."

  # Seta parts. The table routes their cartridges to the same uPD7725
  # interpreter, which reads the first 8192 bytes and checks neither size nor
  # hash.

  - name: "st010.rom"
    aliases: ["SNES_st010.rom"]
    system: nintendo-snes
    description: "Seta ST010 microcode"
    required: true
    source_ref: "Assets/Scripts/SpecialChips/DSP1.cs:98-114 (table lookup, no CRC32 check), SUPERZSNES_Data/level0 (VersionNo.dspDetections entry 4, title CRC32 0x04e7aca6)"
    note: "Selected for header title 'F1 ROC II' with $00 as the 21st byte (F1 ROC II: Race of Champions)."

  - name: "st011.rom"
    aliases: ["SNES_st011.rom"]
    system: nintendo-snes
    description: "Seta ST011 microcode"
    required: true
    source_ref: "Assets/Scripts/SpecialChips/DSP1.cs:98-114 (table lookup, no CRC32 check), SUPERZSNES_Data/level0 (VersionNo.dspDetections entry 5, title CRC32 0xc96d71c1)"
    note: "Selected for header title '2DAN MORITA SHOUGI' with $00 as the 21st byte (Hayazashi Nidan Morita Shougi)."

  - name: "st018.rom"
    aliases: ["SNES_st018.rom"]
    system: nintendo-snes
    description: "Seta ST018 firmware"
    required: true
    source_ref: "Assets/Scripts/SpecialChips/DSP1.cs:98-114 (table lookup, no CRC32 check), SUPERZSNES_Data/level0 (VersionNo.dspDetections entry 6, title CRC32 0x85885c5e)"
    note: "Selected for header title 'NIDAN MORITASHOGI2' (Hayazashi Nidan Morita Shougi 2)."