emulator: NooDS
type: libretro
source: "https://github.com/Hydr8gon/NooDS"
profiled_date: "2026-03-18"
core_version: "Git"
display_name: "Nintendo - DS (NooDS)"
cores: [noods]
systems: [nintendo-ds, nintendo-gba]

notes: |
  NooDS includes full HLE BIOS for ARM9, ARM7 and GBA SWI routines, making
  all BIOS files optional when direct boot is enabled (default). HLE tables
  cover SWI 0x00-0x20 for each processor (hle_bios.cpp:24-62). When BIOS
  files are missing, a special opcode (0xFF at offset 3) is written for
  interrupt return and the HLE handler is activated (memory.cpp:130-169).
  Firmware is 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).
  ARM9 BIOS read: 0x1000 bytes (4 KB), ARM7 BIOS read: 0x4000 bytes (16 KB),
  GBA BIOS read: 0x4000 bytes (16 KB). Firmware bootable threshold: >128 KB
  (spi.cpp:87). DSi mode supported but uses same BIOS files.
  Config: noods.ini keys bios9Path, bios7Path, firmwarePath, gbaBiosPath.

files:
  - name: "bios9.bin"
    system: nintendo-ds
    description: "ARM9 BIOS"
    required: false
    hle_fallback: true
    size: 4096
    md5: "a392174eb3e572fed6447e956bde4b25"
    source_ref: "src/memory.cpp:130-142, src/memory.h:73"
    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
    md5: "df692a80a5b1bc90728bc3dfc76cd948"
    source_ref: "src/memory.cpp:144-156, src/memory.h:74"
    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, src/settings.cpp:42"
    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
    md5: "a860e8c0b6d573d191e4ec7db1b1e4f6"
    source_ref: "src/memory.cpp:158-169, src/memory.h:75, src/core.cpp:244-252"
    notes: "HLE fallback via swiTableGba; native BIOS disables HLE and enables real GBA boot (core.cpp:244-247)"