# melonDS: what changed from 0 to 1

- Product: melonDS (https://whatsnew.fyi/product/melonds)
- Vendor: melonDS
- Range: patch notes entries numbered after 0.9.5 up to and including 1.1, stable releases only
- Entries below: 2 updates (newest first)
- Resolved: 0 is 0.9.5 and 1 is 1.1, the newest stable update of each major we track
- Carrying security changes: 0 · CVEs mentioned: 0 · Mentioning breaking changes: 0 · Removing or deprecating something: 0
- Page: https://whatsnew.fyi/product/melonds/compare/0...1

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

## What changed (49 changes, grouped by kind)

### Added

#### 1.1 (2025-11-18)

- Add DSP HLE, DSP audio, and mic input for DSi
- Add support for PaX MPROTECT on NetBSD in JIT
- Add high-quality resampling with blip-buf for audio
- Add extra D400000x data processing opcodes for AR
- Add support for importing cheats from usrcheat.dat and improve AR UI
- Add support for building melonDS on Windows without MinGW
- Add OpenBSD compatibility in JIT
- Add support for main RAM size register in DSi with hack to work around loader crash

#### 1.0 (2025-07-08)

- add support for solar sensor without using Boktai ROM
- DLDI: add support for unaligned I/O in melonDLDI driver
- AES: load Tad key
- slot-2: add support for Motion Pak and Guitar Grip
- DSi: add support for 32-bit bus VRAM timings (SCFG_EXT9 bit13)

### Changed

#### 1.1 (2025-11-18)

- Use 32-bit division in 3D software renderer
- Make DS banner more accurate in ROM info dialog
- Use new way to access native display/window on X11/Wayland in Qt6
- Update xxHash to 0.8.3
- Reduce frontend audio buffer size to 512 and fix audio sync
- Implement tile size scaling in compute renderer to alleviate glitches at high resolutions

#### 1.0 (2025-07-08)

- improve audio when not running at 60FPS
- camera: make timings and FIFO more accurate
- sound: use single buffer, improves audio latency

### Fixed

#### 1.1 (2025-11-18)

- Fix 8-bit NO$GBA debug register writes
- Fix save type for Legacy of Ys - Books I and II
- Make input system thread-safe to fix random multiplayer crash
- Ensure writable code memory after allocation in JIT/x64
- Handle W^X codemem in fault handler in JIT
- Fix crash when accessing SD/MMC port with no device connected
- Fix gdb stub reading wrong code for vCont packet
- Fix log2(size) in DLDI driver header
- Fix CAM_MCNT reset behavior in camera
- Fix undefined behavior in 3D software renderer when drawing polygons with linear interpolation and Z-buffering
- Fix UI glitchiness under Wayland when OpenGL is used
- Fix minor Thumb BLX immediate bugs
- Fix bug that could randomly break audio output
- Fix uninitialized variable in SPU causing potential crash

#### 1.0 (2025-07-08)

- DSi title manager: fix handling of title strings
- fix gdbstub not activating until the console is reset
- fix framelimiter bugs
- fix undefined behavior when indexing into ARCode::Code
- audio settings: fix mic settings not applying when closing the dialog
- multiplayer: load firmware from correct instance-specific file
- 3D: small fix to translucency flag assignment
- DSP: fix PDATA reads
- slot-2: don't return 0 when attempting to read from the GBA GPIO address
- camera: always trigger DMA when reaching the end of a frame
- NDMA: fix IRQ in infinite repeat mode
- camera: fix resolution selection code
- UI: fix OpenGL issues with multiple windows

## Release notes

### 1.1

- Date: 2025-11-18
- Version: 1.1
- Original notes: https://github.com/melonDS-emu/melonDS/releases/tag/1.1
- Permalink: https://whatsnew.fyi/product/melonds/releases/1.1

- **changed** — Use 32-bit division in 3D software renderer
- **fixed** — Fix 8-bit NO$GBA debug register writes
- **fixed** — Fix save type for Legacy of Ys - Books I and II
- **changed** — Make DS banner more accurate in ROM info dialog
- **added** — Add DSP HLE, DSP audio, and mic input for DSi
- **fixed** — Make input system thread-safe to fix random multiplayer crash
- **fixed** — Ensure writable code memory after allocation in JIT/x64
- **added** — Add support for PaX MPROTECT on NetBSD in JIT
- **fixed** — Handle W^X codemem in fault handler in JIT
- **fixed** — Fix crash when accessing SD/MMC port with no device connected
- **fixed** — Fix gdb stub reading wrong code for vCont packet
- **fixed** — Fix log2(size) in DLDI driver header
- **fixed** — Fix CAM_MCNT reset behavior in camera
- **added** — Add high-quality resampling with blip-buf for audio
- **fixed** — Fix undefined behavior in 3D software renderer when drawing polygons with linear interpolation and Z-buffering
- **added** — Add extra D400000x data processing opcodes for AR
- **changed** — Use new way to access native display/window on X11/Wayland in Qt6
- **added** — Add support for importing cheats from usrcheat.dat and improve AR UI
- **fixed** — Fix UI glitchiness under Wayland when OpenGL is used
- **fixed** — Fix minor Thumb BLX immediate bugs
- **changed** — Update xxHash to 0.8.3
- **changed** — Reduce frontend audio buffer size to 512 and fix audio sync
- **fixed** — Fix bug that could randomly break audio output
- **changed** — Implement tile size scaling in compute renderer to alleviate glitches at high resolutions
- **fixed** — Fix uninitialized variable in SPU causing potential crash
- **added** — Add support for building melonDS on Windows without MinGW
- **added** — Add OpenBSD compatibility in JIT
- **added** — Add support for main RAM size register in DSi with hack to work around loader crash

* 3D: use 32-bit division in software renderer (Arisotura)
* fix 8-bit NO$GBA debug register writes (FrankHB)
* fix save type for Legacy of Ys - Books I and II (CasualPokePlayer)
* ROM info dialog: make DS banner more accurate (Rayyan)
* DSi: add DSP HLE, DSP audio, mic input (Arisotura, CasualPokePlayer)
* make input system thread-safe (fixes random multiplayer crash) (Arisotura)
* CI: various vcpkg improvements (Nadia)
* JIT/x64: ensure writable code memory after alloc (Rayyan)
* JIT: add support for PaX MPROTECT on NetBSD (Rayyan)
* JIT: handle W^X codemem in fault handler (Rayyan)
* SD/MMC: fix crash when accessing port with no device connected (Arisotura)
* gdb stub: fix reading wrong code for vCont packet (jonko0493)
* CI: add OpenBSD CI (Izder456)
* DLDI: fix log2(size) in driver header (Arisotura)
* camera: fix CAM_MCNT reset behavior (Arisotura)
* CI: add x64 FreeBSD and NetBSD CI (Rayyan)
* audio: add high-quality resampling with blip-buf (Nadia)
* 3D: fix UB in software renderer when drawing polygons with linear interpolation and Z-buffering (Arisotura)
* AR: add extra D400000x data processing opcodes (Arisotura)
* Qt6: use new way to access the native display/window on X11/Wayland (Nadia)
* nix: update inputs and add dev shell Qt wrapper workaround (Nadia)
* DSi: add support for the main RAM size register, with hack to work around loader crash (Arisotura)
* AR: add support for importing cheats from usrcheat.dat, improve UI (Arisotura)
* fix UI glitchiness under Wayland when OpenGL is used (Arisotura, thanks PCSX2 team)
* fix minor Thumb BLX immediate bugs (Jakly)
* update xxHash to 0.8.3 (JordanTheToaster)
* reduce frontend audio buffer size to 512, fix audio sync (Nadia)
* fix bug that could randomly break audio output (Arisotura)
* compute renderer: implement tile size scaling to alleviate glitches at high resolutions (FireNX70)
* SPU: fix uninitialized variable causing potential crash (Nadia)
* add support for building melonDS on Windows without MinGW (Nadia)
* JIT: add OpenBSD compatibility (Izder456)

### 1.0

- Date: 2025-07-08
- Version: 1.0
- Original notes: https://github.com/melonDS-emu/melonDS/releases/tag/1.0
- Permalink: https://whatsnew.fyi/product/melonds/releases/1.0

- **fixed** — DSi title manager: fix handling of title strings
- **fixed** — fix gdbstub not activating until the console is reset
- **changed** — improve audio when not running at 60FPS
- **fixed** — fix framelimiter bugs
- **added** — add support for solar sensor without using Boktai ROM
- **fixed** — fix undefined behavior when indexing into ARCode::Code
- **added** — DLDI: add support for unaligned I/O in melonDLDI driver
- **fixed** — audio settings: fix mic settings not applying when closing the dialog
- **fixed** — multiplayer: load firmware from correct instance-specific file
- **fixed** — 3D: small fix to translucency flag assignment
- **added** — AES: load Tad key
- **added** — slot-2: add support for Motion Pak and Guitar Grip
- **fixed** — DSP: fix PDATA reads
- **fixed** — slot-2: don't return 0 when attempting to read from the GBA GPIO address
- **fixed** — camera: always trigger DMA when reaching the end of a frame
- **fixed** — NDMA: fix IRQ in infinite repeat mode
- **fixed** — camera: fix resolution selection code
- **fixed** — UI: fix OpenGL issues with multiple windows
- **changed** — camera: make timings and FIFO more accurate
- **added** — DSi: add support for 32-bit bus VRAM timings (SCFG_EXT9 bit13)
- **changed** — sound: use single buffer, improves audio latency

* build system and CI fixes (Nadia)
* DSi title manager: fix handling of title strings (Rayyan)
* fix gdbstub not activating until the console is reset (ZNixian)
* improve audio when not running at 60FPS (Jakly)
* fix a lot of warnings (Nadia)
* fix framelimiter bugs (Jakly)
* add support for solar sensor without using Boktai ROM (Jesse)
* set SDL_HINT_APP_NAME (redbluegreenhat)
* fix undefined behavior when indexing into ARCode::Code (Jesse)
* DLDI: add support for unaligned I/O in melonDLDI driver (Arisotura)
* audio settings: fix mic settings not applying when closing the dialog (Arisotura, Nadia)
* multiplayer: load firmware from correct instance-specific file (Arisotura)
* 3D: small fix to translucency flag assignment (Jakly)
* AES: load Tad key (edo9300)
* slot-2: add support for Motion Pak and Guitar Grip (asie)
* DSP: fix PDATA reads (Arisotura)
* slot-2: don't return 0 when attempting to read from the GBA GPIO address (edo9300)
* camera: always trigger DMA when reaching the end of a frame (Arisotura)
* NDMA: fix IRQ in infinite repeat mode (Arisotura)
* camera: fix resolution selection code (Arisotura)
* UI: fix OpenGL issues with multiple windows (Arisotura)
* UI: add a way to tell windows apart (Arisotura)
* camera: make timings and FIFO more accurate (Arisotura)
* DSi: add support for 32-bit bus VRAM timings (SCFG_EXT9 bit13) (Arisotura)
* sound: use single buffer, improves audio latency (Sparronator9999)
* fix "full bios boot" not being set properly on initial DSi class creation (Jakly)