google "instant input assembler" and you may find more information. the book was "16-bit microprocessor architecture" by Terry Dollhoff - written in 1979. google "16 bit microprocessor architecture" and you may find links. the book may be available on Amazon and other places. possibly interesting reference to the computer it was installed on at http://archive.org/stream/kilobaudmagazine-1979-07/Kilobaud_Microcomputing_… - look for "instant input" - they talk about the computer it came on. that company (Technico) has been out of business since sometime in the early 1980s.