Image memory controller

Claim 1

An image data control system comprising: a microprocessor; memory means for storing image formation data; printer means for forming an image on paper in accordance with the image formation data; access control means, coupled to the microprocessor, and for making access control to the memory means in response to a command from the microcomputer, wherein the access control means is formed on a single semiconductor chip; state designation signal generating means coupled to the printer means for generating at least two state designation signals representing the operation state of the printer means; the access control means having an address operation function, the operation function being controlled in accordance with the state designation signals; a first of the at least two state designation signals being a print address output request signal, wherein the access control means executes the address operation function for sequentially generating correspondign address signals in accordance with the output request signal; and a second of the at least two states designation signals being at least one of a page-changing signal representing a change in a page of the paper to be printed upon by the print means, wherein the access control means executes the address operation function for generating a correspondence address signal in accordance with the page-changing signal and a line-changing signal representing a change of a line to be printed by the print means, wherein the access control means executes the address operation function for generating a corresponding address signal in accordance with the line-changing signals.