A Method for Implementing Microprocessor-Controlled Systems

Techniques for both hardware and software development of microprocessor systems are discussed. A crossassembler, written for execution on a 16-bit control computer, is used to assemble programs and produce binary output tapes for programming read-only memories. A modular 8-bit microprocessor system has been developed that includes a bus-oriented card file and a group of analog and digital I/O interface cards. This has proved to be a flexible and inexpensive method of implementing a variety of one-of-a-kind microprocessor applications in a laboratory environment.