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:
Sep. 06, 1994
Filed:
Jul. 19, 1991
Marc Hannah, Mountain View, CA (US);
Silicon Graphics, Inc., Mountain View, CA (US);
Abstract
A cursor generator for use in a computer system having a high pixel clock rate. The cursor generator includes a first memory which stores a line of the cursor for display on the display device and a second memory which stores the entire cursor. The data for the line of the cursor can be more quickly retrieved from the first memory than from the second memory, and the first memory is clocked under the control of the high pixel clock rate while the second memory is clocked at a slower clock rate. A controller couples data for the one line of the cursor from the second memory, which is typically dynamic random access memory to the first memory which is typically a high speed register or a combination of registers and multiplexors. The controller couples the data for one line at a time of the cursor to the display device in order to display the cursor in conjunction with the rest of time image displayed on the display device.