Tools for a strange little handheld
WORKSHOP FILE001

WonderSwan deserves more weird little projects.

Yokoi is a workshop for players, builders, and tinkerers—home to openFPGA work, odd hardware, printable objects, and useful downloads.

Browse the projects Read translations
OPEN FILESNO ROMSMADE WITH CARE
A surreal translucent WonderSwan on an indigo electronics workbench, surrounded by ribbon cables, cartridges, and a floating paper swanODD HARDWARE INSIDEY / SWAN LAB
FIG. 001FICTIONAL WORKBENCH STUDY
THE USEFUL PILE

Projects

Three open workbenches for playing, building, and making strange new things for WonderSwan.

01 / NATIVE PLAYERMACOS
A hardware-faithful translucent blue WonderSwan Color displayed above a compact silver desktop computer in an indigo laboratory

SwanSong Desktop

A private, native WonderSwan player and translation workbench for Mac. SwanSong 0.9 adds Translation Shelf for locally verified, separately managed fan translations.

  • NATIVE MACOS
  • TRANSLATION SHELF
  • PRIVATE BY DEFAULT
Download stable 0.9 release notes GitHub
02 / OPENFPGAANALOGUE POCKET
A translucent blue WonderSwan Color hovering above a separate exposed FPGA development board on an acrylic platform

SwanSong Core

WonderSwan and WonderSwan Color rebuilt for Analogue Pocket, with open source, documentation, and reproducible builds.

  • OPENFPGA
  • VERTICAL PLAY
  • WS + WSC
PUBLIC REPOSITORYView on GitHub
03 / MAKE GAMESHOMEBREW
A WonderSwan Color and thin black cartridges with exposed gold edge connectors surrounded by miniature original pixel-art worlds

Homebrew Workshop

Tools, example games, and graphics-first workflows for building original WonderSwan Color projects.

  • STORY FORGE
  • EXAMPLE GAMES
  • WSC TOOLS
Story Forge SwanSong Originals
THE TRANSLATED PAPER TRAIL

Translation archive.

Read technical translations in your browser or keep a PDF copy. Search by title, topic, or system as the shelf grows.

  • SEARCHABLE
  • BROWSER READER
  • DOWNLOADABLE
01DOCUMENT
ManualTechnical translation

Wonder Witch Technical Manual

Technical English translation

A compact translation of the complete 2002 interim manual, covering the WonderWitch memory model, FreyaBIOS services, FreyaOS, filesystems, and the original development ABI.

SOURCE
Japanese
YEAR
2002
LENGTH
81 source pages
FILE
45 KB

Original by Atsushi Watanabe; technical translation prepared for Yokoi

Read in browser Download PDF
PLAY IT IN ENGLISH

Patch a game.

Choose a verified translation and add your own legally dumped game file. The original and patched ROM stay entirely in your browser.

  • NO UPLOAD
  • EXACT ROM CHECK
  • VERIFIED OUTPUT

Loading the local patch station…

WHY YOKOI?

A workshop, not a storefront.

Yokoi is where WonderSwan side projects become usable things: tested files, readable notes, reproducible builds, and downloads that say exactly what they contain.

  1. 01Make the oddness useful.
  2. 02Document the sharp edges.
  3. 03Share files, not mysteries.