Rodney B Belshee

US Patent:

46600299, Apr 21, 1987

Filed:

Jul 6, 1984

Appl. No.:

6/628182

Inventors:

Pavel Houda - Tualatin OR
Richard A. Springer - Tualatin OR
Rodney B. Belshee - Tigard OR

Assignee:

Tektronix, Inc. - Beaverton OR

International Classification:

G09G 114

US Classification:

340744

Abstract:

Graphics commands for a display are listed and divided into sublists corresponding to separate strips or bands of the display, and these sublists drive the display memory consecutively and substantially concurrently with the processing of additional sublists. Graphics commands relating to graphics extending between bands are transferred to successive sublists during processing to provide their display in successive bands. A pair of band size bit map memories are alternately loaded with band information and read out.

US Patent:

47301856, Mar 8, 1988

Filed:

Jul 6, 1984

Appl. No.:

6/628693

Inventors:

Richard A. Springer - Tualatin OR
Pavel Houda - Tualatin OR
Rodney B. Belshee - Tigard OR

Assignee:

Tektronix, Inc. - Beaverton OR

International Classification:

G09G 128

US Classification:

340701

Abstract:

Color dither patterns are read into a pixel bit map memory used to form a color display by means of concurrently addressing a pattern memory storing the dither patterns. Lower order address bits repeatedly access a preselected portion of the pattern memory to supply the dither pattern which is written as data into the pixel bit map memory.