Browse Prior Art Database

Display of Graphics on a Character Generator Display Terminal - Use of Reverse Video Character Attribute to Expand Shading Capability

IP.com Disclosure Number: IPCOM000041528D
Original Publication Date: 1984-Feb-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Crehan, DT: AUTHOR [+2]

Abstract

This article relates to word processing systems having interactive display terminals, particularly to such systems with terminals having "character box displays", i.e., displays which form the alphanumeric characters through the generation of such characters in "character boxes" on the display and printers which print on a character by character basis. Most conventional word processing systems with interactive display terminals generally operate the display terminal as a character generation or "character box" display.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 52% of the total text.

Page 1 of 2

Display of Graphics on a Character Generator Display Terminal - Use of Reverse Video Character Attribute to Expand Shading Capability

This article relates to word processing systems having interactive display terminals, particularly to such systems with terminals having "character box displays", i.e., displays which form the alphanumeric characters through the generation of such characters in "character boxes" on the display and printers which print on a character by character basis. Most conventional word processing systems with interactive display terminals generally operate the display terminal as a character generation or "character box" display. In such a display, an encoded representation of each of a font of characters is stored in a character generator memory, and as each character is to appear on the display during each display refresh cycle, the character generator memory is addressed and the coded representation of that particular character is taken from the memory and displayed in a particular designated "character box" on the display. In accordance with the present expedient, the number of characters in the font is minimized and the capability of the font is expanded by using the "Reverse- Video" attribute to expand the possibilities of shading on graphics produced on the display. Many data processing and/or word processing systems provide character attributes for alphanumeric displays. One such attribute is the "Reverse-Video" attribute which causes the characters associated with it to be displayed such that if the character is normally displayed as a light character on a dark background, it would then be a dark character on a light background. The "Reverse-Video" attribute is commonly used to highlight a given portion of text as an editing function. In the present expedient, the "R...