Abstract: An improved programmable controller which includes a non-destructive memory program storage means wherein the controller is programmable by altering the program by substitution of the non-destructive memory storage means. The memory program storage means is comprised of a first memory portion which stores an operation program for the apparatus and a second memory portion which controls the sequence of execution of the operation program. The second memory portion can simultaneously address a location in the first memory portion and a location in an input-output data interface memory.

Abstract: A copier apparatus control means is disclosed which comprises a digital processor adapted for storing and executing a stored control program. The logical organization of the digital processor is simplified by employing non-destructive memory program storage means. Control of the apparatus is programmable by altering the program through substitution of the non-destructive memory means.