sixtyfive02 (Demo)

Architecture: MOS 6502 features an 8-bit data width, a 16-bit address bus (allowing 64 KB of addressable memory), and uses depletion-load NMOS technology. Performance: Early models ran at 1 MHz, with later variants like the 6502A and 6502B supporting speeds up to 3 MHz or more. Legacy: It powered seminal devices such as the Apple II, Commodore 64, Atari 8-bit computers, and the Nintendo Entertainment System (NES). Variants: The architecture evolved into CMOS versions like the 65C02 (developed by the Western Design Center) and specialized variants such as the 6502C for Atari and the HuC6280 for the TurboGrafx-16. Instruction Set: The original chip included 55 instructions, expanded to 56 in later iterations, supporting various addressing modes like absolute, indexed, and indirect.