{"product_id":"wonderwitch-wonderswan-development-flash-cartridge","title":"WonderWitch - WonderSwan Development Flash Cartridge","description":"\u003ch2\u003e⚠️ Important Notice\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eOnly development version games and programs can be flashed — genuine commercial game ROMs cannot be burned to this cartridge.\u003c\/strong\u003e This is a developer tool for WonderWitch-compatible homebrew and open-source software only.\u003c\/p\u003e\u003ch2\u003eWhat is it?\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eWonderWitch Flash Cartridge\u003c\/strong\u003e is a handmade development cartridge for the \u003cstrong\u003eBandai WonderSwan \/ WonderSwan Color\u003c\/strong\u003e handheld, compatible with the original \u003cstrong\u003eWonderWitch development platform\u003c\/strong\u003e. It allows you to upload, download, and run WonderWitch development programs directly on real WonderSwan hardware.\u003c\/p\u003e\u003cp\u003eThe package includes:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e➡️ Handmade WonderWitch flash cartridge (chip salvaged from original cartridge)\u003c\/li\u003e\n\u003cli\u003e➡️ HDMI connector data transmission board (USB Type-C to WonderSwan link)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cem\u003eWonderSwan \/ WonderSwan Color console not included — shown for demonstration only.\u003c\/em\u003e\u003c\/p\u003e\u003ch2\u003eConnection Method\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eComputer → USB-C Transmission Board → WonderSwan (with WonderWitch cartridge inserted)\u003c\/strong\u003e\u003c\/p\u003e\u003col\u003e\n\u003cli\u003eInsert the WonderWitch flash cartridge into your WS or WSC\u003c\/li\u003e\n\u003cli\u003eConnect the transmission board via USB-C to your computer\u003c\/li\u003e\n\u003cli\u003eOpen the WonderWitch client software, select the recognized COM port\u003c\/li\u003e\n\u003cli\u003eOn the WonderSwan, select \u003cstrong\u003eCommunication\u003c\/strong\u003e to connect to the computer\u003c\/li\u003e\n\u003cli\u003eUpload or download development programs freely\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Currently only confirmed working on \u003cstrong\u003eWindows 10\u003c\/strong\u003e. Windows 7 compatibility untested.\u003c\/p\u003e\u003ch2\u003eWhat Makes It Special?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRare developer tool:\u003c\/strong\u003e Original WonderWitch transmission cables cost hundreds of dollars and are extremely scarce — complete sets with cartridge sell for thousands\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandmade with original chips:\u003c\/strong\u003e Chip salvaged and repurposed from original WonderWitch cartridge hardware\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWS \u0026amp; WSC compatible:\u003c\/strong\u003e Works on both WonderSwan and WonderSwan Color (WSC-exclusive color games require WSC hardware)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow power optimized:\u003c\/strong\u003e Iterated through many versions to achieve low battery consumption matching the original\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActive homebrew ecosystem:\u003c\/strong\u003e WonderWitch official website (\u003ca href=\"http:\/\/wwgp.qute.co.jp\/\"\u003ewwgp.qute.co.jp\u003c\/a\u003e) still accessible — client software and 2001–2003 open development works available for download\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eAvailable user space after system: \u003cstrong\u003eless than 400KB\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSupported game size: \u003cstrong\u003e64KB – 300+KB\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eFile directory stored in SRAM — battery required at all times (removing battery clears stored programs on next boot, same behavior as original hardware)\u003c\/li\u003e\n\u003cli\u003eWonderSwan Color games cannot run on original WonderSwan (same as GB\/GBC compatibility)\u003c\/li\u003e\n\u003cli\u003eSome WSC games display in black \u0026amp; white on WS (e.g. Tetris, Immortal World 2)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTested Compatible Games\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDice Knight (notably different from the retail version)\u003c\/li\u003e\n\u003cli\u003eSilver Sword of Judgment — Mission Edition\u003c\/li\u003e\n\u003cli\u003eVarious small WonderWitch homebrew games\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Denjhang's Retro Hardware","offers":[{"title":"Default Title","offer_id":46192055386309,"sku":null,"price":139.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0777\/8507\/1813\/files\/2025-03-31T11_53_58_566Z-O1CN01dXyifW1NIZhqWur7T__0-fleamarket_jpg_Q90_jpg.jpg?v=1778205253","url":"https:\/\/denjhang.myshopify.com\/products\/wonderwitch-wonderswan-development-flash-cartridge","provider":"Denjhang's Retro Hardware","version":"1.0","type":"link"}