This 1983 InfoWorld has a few articles about Obsolete Computers. It covers
the Altair and other S-100 machines. There is a story about someone making
an upgrade ROM board for the Processor Technology SOL-20. The Computer
Museum was still in Boston. It asks "Will today's Lisas and Radio Shack
Model 100s be as priceless to the computer industry as are the Crown Jewels
are to England?"
InfoWorld June 6, 1983. Pages 27 - 37
http://books.google.com/books?id=zy8EAAAAMBAJ
<http://books.google.com/books?id=zy8EAAAAMBAJ&pg=PA27> &pg=PA27
Michael Holley