emulator: NooDS
type: libretro
core_classification: community_fork
source: "https://github.com/jonian/libretro-noods"
upstream: "https://github.com/Hydr8gon/NooDS"
profiled_date: "2026-03-24"
core_version: "Git"
display_name: "Nintendo - DS (NooDS)"
cores: [noods]
systems: [nintendo-ds, nintendo-gba]

notes: |
  Full HLE BIOS for ARM9, ARM7 and GBA SWI routines (hle_bios.cpp:24-60).
  All BIOS files optional when direct boot is enabled (default). When missing,
  HLE handler activated via special opcode at offset 3 (memory.cpp:139-168).
  Firmware auto-generated (128KB non-bootable) if not provided, with default
  WiFi config, touch calibration and user settings (spi.cpp:90-160). Native
  BIOS+firmware required only for firmware boot (non-direct-boot mode).
  Bootable firmware threshold: >128KB (spi.cpp:87). DLDI patching provides
  SD card access for homebrew via nds_sd_card.bin (dldi.cpp:29-77).
  File loading code identical between upstream and libretro port.

files:
  - name: "bios9.bin"
    system: nintendo-ds
    description: "ARM9 BIOS"
    required: false
    hle_fallback: true
    size: 4096
    source_ref: "src/memory.cpp:130-141"
    notes: "HLE fallback for all SWI calls; native needed for firmware boot and logo verification (copyBiosLogo)"

  - name: "bios7.bin"
    system: nintendo-ds
    description: "ARM7 BIOS"
    required: false
    hle_fallback: true
    size: 16384
    source_ref: "src/memory.cpp:144-155"
    notes: "HLE fallback for all SWI calls; native needed for firmware boot"

  - name: "firmware.bin"
    system: nintendo-ds
    description: "NDS firmware image"
    required: false
    hle_fallback: true
    source_ref: "src/spi.cpp:62-160"
    notes: "Auto-generated 128KB non-bootable firmware as fallback; native dump (>128KB) needed for firmware boot"

  - name: "gba_bios.bin"
    system: nintendo-gba
    description: "GBA BIOS"
    required: false
    hle_fallback: true
    size: 16384
    source_ref: "src/memory.cpp:158-168, src/core.cpp:252-256"
    notes: "HLE fallback via swiTableGba; native BIOS disables HLE and enables real GBA boot"

  - name: "nds_sd_card.bin"
    system: nintendo-ds
    description: "DLDI SD card image for homebrew"
    required: false
    source_ref: "src/dldi.cpp:80-83, src/libretro/libretro.cpp:331"
    notes: "Opened on DLDI startup() call from homebrew ROMs; user-created FAT image"