Reviving the 1986 Casio FX-870P Pocket Computer in Your Browser

Casio FX-870P Emulator

I ported a classic Delphi emulator for the 1986 Casio FX-870P to the web using TypeScript and Vue 3. This browser-based tool faithfully recreates the Hitachi HD61700 CPU, 96x64 pixel display, and 83-key keyboard. Users can run vintage BASIC programs, debug machine code, and even use a floppy disk emulator via the Origin Private File System, bringing this retro pocket computer to a modern audience.

"Generated code calls into the existing ROM for PRINT, INPUT, FP math, and string operations rather than reimplementing the runtime."