---
title: MOS 6502 Microprocessor
last_updated: '2022-05-16T14:26:03-04:00'
---

Name            | 6502
---             | ---
Introduced      | 1975
Data Width      | 8-bit
Address Width   | 16-bit
Endianness      | Little
Registers       | 8-bit A, X, Y, Stack. 16-bit PC
Package         | 40-pin DIP
Instruction Count | 56

## Addressing Modes
- Implied
- Immediate
- Absolute
- Indexed Absolute
- Indexed Zero-Page
- Relative
- Accumulator
- Indirect, X
- Indirect, Y

## Docs
- [WDC W65C02S NMOS Variant](https://www.westerndesigncenter.com/wdc/documentation/w65c02s.pdf)
- [6502.org: collection of 6502 resources](http://6502.org/)

## Notable Usage (includes variants)
- Nintendo Entertainment System
- Atari 2600
- Apple II
- Commodore 64
- BBC Micro