emulator: "higan (SFC Accuracy)"
type: libretro
core_classification: community_fork
source: "https://github.com/libretro/nSide"
upstream: "https://github.com/byuu/higan"
profiled_date: "2026-03-23"
core_version: "v105 (Super Famicom Accuracy)"
display_name: "Nintendo - SNES / Famicom (higan Accuracy)"
cores:
  - higan_sfc
systems:
  - nintendo-snes
  - nintendo-sgb

notes: |
  Fork of higan v106 by hex-usr, renamed at byuu's request. Dot-based
  PPU profile (cycle-accurate, most demanding). Current nSide source
  blocks accuracy build (#error at libretro.cpp:39, libretro-sfc.cpp:8).
  Core is orphaned from an older nSide revision.
  Coprocessor firmware loaded via icarus manifest system from system_dir.
  File names follow icarus convention: {identifier}.{content}.rom.
  SGB emulation loads from SGB1.sfc/ or SGB2.sfc/ subdirectories,
  with fallback to SGB.sfc/ and Super GameBoy.sfc/.
  SPC700 IPL ROM (ipl.rom, 64 bytes) compiled into binary.
  Accuracy and balanced cartridge loading code is identical.

files:
  # DSP coprocessors - uPD7725 (split data+program format)
  - name: "dsp1.data.rom"
    system: nintendo-snes
    required: false
    source_ref: "nSide/sfc/cartridge/load.cpp:457-502"

  - name: "dsp1.program.rom"
    system: nintendo-snes
    required: false
    source_ref: "nSide/sfc/cartridge/load.cpp:457-502"

  - name: "dsp1b.data.rom"
    system: nintendo-snes
    required: false
    source_ref: "nSide/sfc/cartridge/load.cpp:457-502"

  - name: "dsp1b.program.rom"
    system: nintendo-snes
    required: false
    source_ref: "nSide/sfc/cartridge/load.cpp:457-502"

  - name: "dsp2.data.rom"
    system: nintendo-snes
    required: false
    source_ref: "nSide/sfc/cartridge/load.cpp:457-502"

  - name: "dsp2.program.rom"
    system: nintendo-snes
    required: false
    source_ref: "nSide/sfc/cartridge/load.cpp:457-502"

  - name: "dsp3.data.rom"
    system: nintendo-snes
    required: false
    source_ref: "nSide/sfc/cartridge/load.cpp:457-502"

  - name: "dsp3.program.rom"
    system: nintendo-snes
    required: false
    source_ref: "nSide/sfc/cartridge/load.cpp:457-502"

  - name: "dsp4.data.rom"
    system: nintendo-snes
    required: false
    source_ref: "nSide/sfc/cartridge/load.cpp:457-502"

  - name: "dsp4.program.rom"
    system: nintendo-snes
    required: false
    source_ref: "nSide/sfc/cartridge/load.cpp:457-502"

  # CX4 coprocessor - HG51BS169
  - name: "cx4.data.rom"
    system: nintendo-snes
    required: false
    source_ref: "nSide/sfc/cartridge/load.cpp:405-454"

  # Seta coprocessors - uPD96050
  - name: "st010.data.rom"
    system: nintendo-snes
    required: false
    source_ref: "nSide/sfc/cartridge/load.cpp:504-548"

  - name: "st010.program.rom"
    system: nintendo-snes
    required: false
    source_ref: "nSide/sfc/cartridge/load.cpp:504-548"

  - name: "st011.data.rom"
    system: nintendo-snes
    required: false
    source_ref: "nSide/sfc/cartridge/load.cpp:504-548"

  - name: "st011.program.rom"
    system: nintendo-snes
    required: false
    source_ref: "nSide/sfc/cartridge/load.cpp:504-548"

  # ST018 coprocessor - ARM6
  - name: "st018.data.rom"
    system: nintendo-snes
    required: false
    source_ref: "nSide/sfc/cartridge/load.cpp:362-402"

  - name: "st018.program.rom"
    system: nintendo-snes
    required: false
    source_ref: "nSide/sfc/cartridge/load.cpp:362-402"

  # Super Game Boy
  - name: "SGB1.sfc/sgb1.boot.rom"
    system: nintendo-sgb
    required: false
    source_ref: "nSide/gb/system/system.cpp:54-65"

  - name: "SGB1.sfc/program.rom"
    system: nintendo-sgb
    required: false
    source_ref: "nSide/target-libretro/libretro-sfc.cpp:179-215"

  - name: "SGB2.sfc/sgb2.boot.rom"
    system: nintendo-sgb
    required: false
    source_ref: "nSide/gb/system/system.cpp:54-65"

  - name: "SGB2.sfc/program.rom"
    system: nintendo-sgb
    required: false
    source_ref: "nSide/target-libretro/libretro-sfc.cpp:179-215"