Display Pointing Device Interface Tightly Coupled With a Video Subsystem
Original Publication Date: 1989-Apr-01
Included in the Prior Art Database: 2005-Jan-27
A technique is described whereby a display pointing device interface allows operator-generated cursor motion to be controlled by means of hardware, so as to eliminate the need for software intervention. The interface is designed to be tightly coupled with a video subsystem used in remote graphics workstations of personal computer systems. Typically, the operation of a pointing device involves software in both the tracking of the pointer movement and in providing user feedback. When using a mouse type of input device, the movement of the cursor on a display is controlled through two independent interfaces. The feedback can be as simple as writing a cursor coordinate to the video hardware.