Archived copy. The original page at visual6502.org has been returning HTTP 500 since the wiki's MediaWiki installation failed. This is a static reconstruction from the page's original wikitext captured by the Internet Archive on 2014-12-24, by the Visual6502 project — Greg James, Barry Silverman and Brian Silverman, and the Visual6502 team, licensed CC BY-NC-SA 3.0.

original: http://visual6502.org/wiki/index.php?title=File:650X-onchipclocking.png&action=edit

snapshot: https://web.archive.org/web/20141224041945id_/http://visual6502.org/wiki/index.php?title=File:650X-onchipclocking.png&action=edit

File:650X-onchipclocking.png

detail from 650X Schematic showing some of the X/O boxes believed to indicate the 6501/6502 variations in metallisation.