The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 12, 1991
Filed:
May. 16, 1989
Satish Gupta, Peekskill, NY (US);
Randall L Henderson, West Hurley, NY (US);
Nathan R Hiltebeitel, South Burlington, VT (US);
Robert Tamlyn, Jericho, VT (US);
Steven W Tomashot, Jericho, VT (US);
Todd Williams, Essex Junction, VT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An implementation of a serial access memory register that facilitates the selecting from two alternate frame buffers on a per pixel basis. The frame buffers are each stored in a portion of a row in a single video RAM. Following data transfer to the serial access memory register, data from each of the two frame buffers is available. A double buffer select signal controls the selection of which half of the serial access memory register will put data on the output bus for each serial clock signal. The serial clock increments the address pointers in both halves of the serial access memory port simultaneously.