{"product_id":"my4th-light-computer-board","title":"My4TH Light Computer Board","description":"\u003ch3\u003eWhat is it?\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eMy4TH Light\u003c\/strong\u003e is the big brother of the My4TH XS computer board — a compact, TTL-based \u003cstrong\u003eForth 2012 computer\u003c\/strong\u003e with significant upgrades over its smaller sibling. Most notably, it features an \u003cstrong\u003eI2C bus running at 83 kHz\u003c\/strong\u003e, eight times faster than the original My4TH board, making it an ideal interface for connecting LCD displays, I\/O expanders, and sensor breakout boards.\u003c\/p\u003e\u003cp\u003eThe larger ROM also allows a much richer firmware: \u003cstrong\u003e295 standard Forth words\u003c\/strong\u003e, built-in \u003cstrong\u003efloating point support\u003c\/strong\u003e, and software drivers for I2C-based LCDs and GPIO expanders are all included out of the box — no expansion modules required.\u003c\/p\u003e\u003ch3\u003eWhy did you make it?\u003c\/h3\u003e\u003cp\u003eThe My4TH Light was designed to extend the My4TH platform for users who need faster I2C communication and a richer built-in Forth environment. By moving floating point and I2C drivers into ROM, the system is immediately productive without requiring EEPROM expansion modules for common tasks. It’s a capable, self-contained Forth computer in a compact 90×83mm footprint, ideal for learning, experimentation, and embedded projects.\u003c\/p\u003e\u003ch3\u003eWhat makes it special?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast I2C bus at 83 kHz\u003c\/strong\u003e — 8× faster than the original My4TH; ideal for LCD, sensor, and I\/O expander connectivity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForth 2012 OS\u003c\/strong\u003e — 295 standard words included in ROM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in floating point support\u003c\/strong\u003e — no expansion module needed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI2C driver support\u003c\/strong\u003e — built-in drivers for I2C LCDs and general-purpose I\/O port expanders\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProven ALU-less design\u003c\/strong\u003e — 13 logic ICs, 3 memory chips\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory:\u003c\/strong\u003e 32KB EPROM + 8KB SRAM + optional 64KB EEPROM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClock speed:\u003c\/strong\u003e fixed 8 MHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTTL-level UART\u003c\/strong\u003e at 4800 baud\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact PCB:\u003c\/strong\u003e 90×83mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional PS\/2 keyboard\u003c\/strong\u003e for direct input\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Versaterm\u003c\/strong\u003e terminal interface\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOptions Available\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePS\/2 Keyboard:\u003c\/strong\u003e Yes \/ No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersaterm:\u003c\/strong\u003e Yes \/ No\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eExternal Links\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/github.com\/denjhang\/My4TH-light\"\u003eGitHub: My4TH-light\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e","brand":"Denjhang's Retro Hardware","offers":[{"title":"Default Title","offer_id":46123577704645,"sku":null,"price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0777\/8507\/1813\/files\/2024-05-02T07_16_08.940Z-46A613FF8637801FC3A7111A246D055F.jpg?v=1777006840","url":"https:\/\/denjhang.myshopify.com\/products\/my4th-light-computer-board","provider":"Denjhang's Retro Hardware","version":"1.0","type":"link"}