highbyte 2

https://industrialdataunificationspot.nexorafield.com/posts/why-industrial-data-unification-matters-for-smart-manufacturing

Highbyte is a tiny 8-bit computer emulator that fits on a business card, designed to teach the basics of machine language and hardware architecture. It runs simple programs using a minimalist instruction set and includes a hex keypad for input. Perfect for hobbyists who want to tinker with low-level computing without needing a full-scale system.