D.Smile

VTech V.Smile emulator for Android.

Features

Play

• Runs V.Smile cartridge dumps straight away, no BIOS required.
• Optional system bios import for maximum compatibility. Not necessary for most titles.
• Save states with thumbnails and timestamps, and per game slot memory.
• Rewind and fast forward with adjustable speed.

Look

• CRT shader with barrel curvature, glow, scanlines, aperture grille and vignette, each with effect its own intensity slider.
• Pixel, sharp, and CRT display modes. For aspect ratio you have 4:3, stretch, and integer scaling.
• Themed letterbox backgrounds (black, wavy blue, or V.Smile purple) and silver or black TV bezels that wrap the picture.
• Two renderer options. One that should be fast and perfect for most games, but the second is intended to be a more accurate option for edge cases.

Control

• An on screen controller modelled on the real thing, with classic orange and pink themes.
• A full layout editor: drag to move, box select to move groups, resize with a multiplier, save and name your own layouts.
• Gamepad support with remappable buttons and bindable hotkeys for save, load, fast forward and rewind.

Fit in

• Launches directly into a game from front ends like iiSU, Daijisho and ES-DE.
• Lots of QOL features and bug fixes baked-in that a lot of niche emulators fall short on.

Screenshots

CRT shader, classic controller	Crisp pixel mode, pink controller

Getting started

1. Grab the latest D.Smile-x.y.z.apk from Releases and install it (allow installs from your browser if prompted).
2. Open D.Smile, tap ROM folder, and pick the folder with your .bin dumps.
3. Tap a game. The menu button in the top corner opens save states, video options, the layout editor and more.

A BIOS is not required. Games boot and play fine without one. Importing a V.Smile system ROM (tap BIOS) is purely optional and only adds a bit of extra compatibility that can help a handful of games. Skip it unless you run into a title that misbehaves.

Launching from a front end

D.Smile exposes an activity that front ends can launch straight into a game. See docs/iisu-integration.md for the iiSU config block and the general intent contract that also covers Daijisho and ES-DE.

Acknowledgements

This project wouldn't exist without the V.Smile reverse engineering work that came before it:

• veesem by sp1187 (ISC license) — the primary behavioral reference for this emulator. D.Smile's core was verified against veesem instruction-by-instruction during development, and its hardware model (unSP CPU, PPU, SPU, controller handshake) taught this project most of what it knows.
• MAME — the SPG2xx and V.Smile drivers (Ryan Holtz, Vas Crabb, and contributors) documented the hardware registers, timings and controller protocol that both veesem and D.Smile build on. The accurate-render fade/saturation formulas follow MAME's implementation.
• V.Frown by Schnert0 — a further reference for controller timing and hardware behavior.
• Oboe by Google (Apache-2.0) — the low-latency Android audio library D.Smile ships with.
• The V.Smile research and homebrew community, whose compatibility testing and hardware documentation made a project like this possible.

Where D.Smile's behavior diverges from these projects (controller reporting modes, held-input handling, sprite DMA edge cases), the changes are original findings — documented in the commit history so they can flow back upstream.

License

Personal project. Code written for D.Smile, informed by the references above. Not affiliated with or endorsed by VTech.