emulator: mednafen_supergrafx
type: libretro
core_classification: community_fork
source: "https://github.com/libretro/beetle-supergrafx-libretro"
upstream: "https://mednafen.github.io/"
profiled_date: "2026-03-24"
core_version: "v1.23.0"
display_name: "NEC - PC Engine SuperGrafx (Beetle SuperGrafx)"
cores: [mednafen_supergrafx, beetle_supergrafx]
systems: [nec-pc-engine]
verification: existence
notes: >
  Fork of Mednafen's pce_fast module with SuperGrafx and CD support.
  Separate codebase from beetle_pce (mednafen/pce_fast/ vs mednafen/pce/).
  BIOS loaded via HuC_LoadCD() at CD-ROM load time. Core option "sgx_cdbios"
  selects which card image to use (default: System Card 3).
  DetectGECD() auto-detects Games Express discs and overrides to gexpress.pce.
  DetectSGXCD() detects SuperGrafx CD titles via magic bytes.
  Arcade Card mode (sgx_arcadecard option, not exposed) extends System Card 3
  with extra RAM mapping.
  No hash or size validation on BIOS load.
  Upstream pce_fast module has a single pce_fast.cdbios string setting;
  the 4-option dropdown is a libretro addition. Upstream has no separate
  gecdbios setting (unlike the accurate pce module).

files:
  - name: "syscard3.pce"
    description: "CD-ROM System Card 3.0 (Japan)"
    region: "NTSC-J"
    required: true
    source_ref: "libretro.cpp:972-973, mednafen/settings.cpp:37"
    note: "Default value for sgx_cdbios option."

  - name: "syscard2.pce"
    description: "CD-ROM System Card 2.0 (Japan)"
    region: "NTSC-J"
    required: false
    source_ref: "libretro.cpp:974-975"
    note: "sgx_cdbios = 'System Card 2'."

  - name: "syscard1.pce"
    description: "CD-ROM System Card 1.0 (Japan)"
    region: "NTSC-J"
    required: false
    source_ref: "libretro.cpp:976-977"
    note: "sgx_cdbios = 'System Card 1'."

  - name: "gexpress.pce"
    description: "Games Express CD Card"
    region: "NTSC-J"
    required: false
    source_ref: "libretro.cpp:978-979, mednafen/pce_fast/pce.cpp:330-367,453-454"
    note: "sgx_cdbios = 'Games Express' or auto-detected via DetectGECD()."