emulator: ChimeraSNES
type: libretro
source: "https://github.com/jamsilva/chimerasnes"
upstream: "https://github.com/snes9xgit/snes9x"
profiled_date: "2026-03-18"
core_version: ""
display_name: "Nintendo - SNES / SFC (ChimeraSNES)"
cores: [chimerasnes]
systems:
  - nintendo-snes

notes: |
  Fork of Snes9x ~2005, optimized for slow hardware.
  NOT identical to snes9x — different firmware behavior.

  All coprocessor data is HLE with static ROM tables embedded:
    DSP1: DSP1ROM[1024] in source/dsp1.c:6
    DSP3: DSP3_DataROM[1024] in source/dsp3.c:7
  No external DSP/ST/CX4 firmware files needed.

  BS-X: path constructed in source/bsx.c:873 as romdir/BS-X.bios
  (relative to ROM directory, NOT system_dir). No
  RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY for firmware loading.

  firmware_count absent in .info (= 0). Confirmed in source.

files: []
# all coprocessors HLE with embedded data
# BS-X.bios loaded from ROM directory, not system_dir