Bravo Al,
Thanks a ton ! I appreciate it.
If anyone initially grabbed the files when I first posted my link, I added some mp3 files extracted from cassette tape that are the programs in Vol1 and Vol2 of the Interface manual. Hopefully, they will load for folks if they get to that point in the course. This was one tape that came with my personal boards. Again, Bob Sylvester did the legwork in locating and obtaining the manuals but could not handle the books due to "old book mold syndrome", so he passed them to me to scan since I had the capability.
john - colorado springs, co