User's Manual Interface Designer's Reference NOVA and Eclipse Line Computers. In Very Good condition. From personal collection.
. "The purpose of this manual is to describe the structure of the I/O bus and provide information for designing and building a custom interface assembly which can be used on NOVA and ECLIPSE Lines. This manual discusses the I/O bus structure, explains specific functions, and provides information for designing and building an interface assembly. Reader should have a working knowledge of digital circuits and some experience with digital computers."
