[glabifrons]

This is a bit terse [0], but still very cool. I used to love to follow all of the new CPUs from the various vendors to see how they compared in performance, wattage, transistor count, etc. by following The CPU Info Center at Berkeley. Sadly, the site was abandoned around 2004 and removed some time after, but you can still see some of the content if you search archive.org for http://bwrc.eecs.berkeley.edu/cic (dig back to the spikes in 2005 or so). My favorite was watching the Alpha... every time HP's PA-RISC would bump past it, DEC would release either a new generation or maybe just bump the clock in the Alpha and completely blow it away. Hungry beasts though... and way out of my budget when they were being made. It would be neat to see a chart like that with modern CPUs - shame they abandoned the site.

0 - It has very short descriptions for each stage. There's not quite enough info to understand the "whys". Like it states that the 6501 was dropped after the threat of a lawsuit, but doesn't explain that it was because of it being pin-(and I believe signal)-compatible with the 6800, which the 6502 was not.