Bill Degnan wrote:
I wonder if this is the board Roger Amidon wrote the Apple Monitor for?
No, he wrote it for the MITS Altair he bought. Roger said so, in a panel at VCF-East some years ago. You may be confusing "TDL" with "TEI". For TEI docs, I only have docs for the mainframe. Jonathan AKA System Glitch wrote:
I noticed that the layout of the basic CPU function (excluding the add-ons) is *very* similar to the IMSAI MPU-A.
Your Web page is a good examination. It notes even board-trace similarities. It's likely TEI copied the IMSAI and then added their own features. Lots of copying went on in the S-100 era, down to replicating boards completely. If it's that similar, then producing a schematic may be a matter of verifying the board with ohmmeter following (and correcting) the MPU-A schematic. Herb -- Herbert R. Johnson, New Jersey USA http://www.retrotechnology.com OR .net