At this web page there are quite a few intersting links that may of interest and maybe of use to you. I think this page is hosted by the author of The Microcontroller Idea Book.

8052-Basic Microcontrollers

This web page on Gary Drumm's web site shows a picture of a development board plus a schematic. Then on the page there is also a link .pdf that leads to a document that shows the plotter output of the artwork interconnectivity this same development board.

Michael Karas