Browse Prior Art Database

Method to Provide PC COLOR Graphics Emulation on a High Resolution Monochrome Display

IP.com Disclosure Number: IPCOM000058208D
Original Publication Date: 1988-Sep-01
Included in the Prior Art Database: 2005-Feb-15

Publishing Venue

IBM

Related People

Authors:
Blackard, JW Neal, KS [+details]

Abstract

A method is described for simulating colors on a high resolution All- Points-Addressable (APA) monochrome display. On a high resolution monochrome display (e.g., APA-16), will All- Points-Addressable capabilities, it is possible to display an image which was to be painted onto a PC Color Display. A PC color graphics image is 640x200 pels and consists of four colors (this mode is usually referred to as 320x200 medium resolution mode). A method was needed to simulate the four colors on the monochrome screen. The problem of mapping the image to the monochrome display and, at the same time, correcting the aspect ratio, is discussed in the preceding article. As a result of correcting the aspect ratio, a new image which is 960x600 pels is produced and then centered on the APA display.