A switched memory decoding circuit for bus oriented microprocessor systems

Abstract

Switched memory decoding can be of considerable practical use in the development of microprocessor systems, particularly embedded microprocessor systems, in situations when prototypes for evaluation are required at an early stage. In the case of bus oriented microprocessor systems, a switched memory decoding module can be conveniently designed on a single printed circuit, which can be plugged into the bus during development and prototype evaluation, and then replaced by a permanent memory in the final unit. In this paper the design of a switched memory decoding circuit is described, which can be used in bus oriented microprocessor systems equipped with the MC6800 MPU.