High speed cursor generation apparatus

Details High speed cursor generation apparatus High speed cursor generation apparatus

1991-07-19

1994-09-06

Weldon, Ulysses

Computer graphics processing and selective visual display system

Display peripheral interface input device

Cursor mark position control device

345159, 345197, G09G 508

Patent

active

053452526

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.

REFERENCES:
patent: 4190835 (1980-02-01), Buynak
patent: 4245244 (1981-01-01), Lijewski et al.
patent: 4454507 (1984-06-01), Srinivasan et al.
patent: 4668947 (1987-05-01), Clarke, Jr.
patent: 4706074 (1987-11-01), Muhich et al.
patent: 4851834 (1989-07-01), Stockebrand et al.
patent: 4987551 (1991-01-01), Garrett, Jr.
patent: 5001469 (1991-03-01), Pappas et al.

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