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:
Oct. 30, 1990
Filed:
Sep. 13, 1988
Wesley O Rupel, Bellevue, WA (US);
Anthony C Pisculli, Seattle, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
A method and system of displaying a monochrome bitmap on a color display. In a preferred embodiment, a system according to the present invention accomplishes the display of the monochrome bitmap in any two preselected colors. The multibit representations for the two preselected display colors are compared to identify bitmap planes having common bit values for each color. The input for logic units for the identified planes are then forced to 0. The latch registers for each plane of the bitmap memory are then set to the bit value for the first preselected color in that plane. The input values from the monochrome bitmap, as altered by the force-to-0 operation for common planes, are logically exclusively ORed with the latch register values to produce the bitmap memory values for displays. An alternate embodiment suitable for updating partial bytes within the bitmaps is also provided.