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:
Dec. 09, 1997
Filed:
Nov. 20, 1995
Charles R Johns, Austin, TX (US);
John T Roberson, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A two dimensional frame buffer memory interface structure is provided. The interface comprises a parallel data bus, a control signal bus, a data cache, and a controller. The parallel data bus transfers a set of pixel data in parallel to the data cache. The control signal bus transfers to the controller a X strobe signal, a Y strobe signal, and a mode signal indicating an interface mode specifying a designated pattern for the pixel data transferred over the parallel data bus. The data cache, controlled by the controller and connected to the parallel data bus, compiles each set of pixel data received over the parallel data bus into the designated pattern of pixels, as indicated by the mode signal. The controller transfers each set of pixel data from the data cache to a two dimensional frame buffer to be stored in the designated pattern at a calculated address, wherein an address in the two dimensional frame buffer is specified by an X address and a Y address and wherein the calculated address for a given set of pixel data is an X address equal to the X address of a previous set of pixel data plus, when a X strobe signal is received for the given set of pixel data, an X increment associated with the indicated interface mode, and a Y address equal to a Y address of the previous set of pixel data plus, when a Y strobe signal is received for the given set of pixel data, a Y increment associated with the indicated interface mode.