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:
Feb. 10, 1987
Filed:
Sep. 27, 1983
Michael G Lavelle, San Jose, CA (US);
Motorola Computer Systems, Inc., Cupertino, CA (US);
Abstract
In an intelligent video terminal communicating with a central processor, a video memory controller is provided which performs a variety of data transfer operations in response to commands from a terminal processor. The data transfer operations include block reads and block writes, copying an entire screen data line or a portion thereof, scrolling an entire screen line or a portion thereof, filling a screen line or a portion thereof with a desired character, and independently scrolling a row segment within each of multiple independent screen display areas. In addition, the current location of the cursor within each screen display area can be monitored. Many of the data transfer operations are performed by the video memory controller in response to a single terminal processor command, thereby minimizing terminal processor interrupts.