The Better Half subscribes to Archaeology Magazine. When her copy arrived yesterday, she showed me an article devoted to the history of old computers. They featured the MOS 6502 microprocessor that powered early Atari, Nintendo, Apple and Commodore computers. The article highlighted a group of computer experts that are digging into the history of old computers and attempting to reverse engineer some of the lost, but primitive, technology.
The group has a website that contains a slide show about devices using the 6502 as well as an actual simulator of the microprocessor. If you remember these old computers, you will enjoy their website.

Clickable image - screen shot of the 6502 simulator
Excerpt from their interesting Visual6502.org website:
Welcome to Visual6502.org! Here we’ll slowly but surely present our small team’s effort to preserve, study, and document historic computers. We aim to present our work in a visual, intuitive manner for education and inspiration, and to serve as a solid verifiable reference for classic computer systems. See our slides for an introduction and some fun images.
Have you ever wondered how the chips inside your computer work? How they process information and run programs? Are you maybe a bit let down by the low resolution of chip photographs on the web or by complex diagrams that reveal very little about how circuits work? Then you’ve come to the right place!