6502
6502, short for MOS Technology 6502 Microprocessor, was created by Chuck Peddle and his team in 1975. 6502 is an 8-bit microprocessor and assembly language used in early home computers, video game consoles, and embedded systems.
DCPU-16
DCPU-16, short for DCPU-16 Virtual CPU Architecture, was created by Markus Persson in 2012 for the game 0x10c. DCPU-16 is a fictional 16-bit CPU instruction set and assembly language used primarily for educational purposes, hobbyist programming, and emulation projects. Developers can access DCPU-16 emulators through DCPU-16 Emulator, which provides instruction references, example code, and emulator downloads for Windows, macOS, and Linux.