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Browse Prior Art Database

Efficient Storage for CRT Display having Alternate Display Modes

IP.com Disclosure Number: IPCOM000051421D
Original Publication Date: 1981-Jan-01
Included in the Prior Art Database: 2005-Feb-10

Publishing Venue

IBM

Related People

Authors:
Ringle, TW Van Dyke, MS [+details]

Abstract

This article describes a matrix pattern random-access storage interface between a CRT display and a driving system controlling the display of characters in a first mode of operation and dots and dashes representative of characters and words in a second mode of operation. Character font information is stored in a 5 by 7 array and double dotted to form a 10 by 14 display matrix. When operating in the second mode of operation, double dotting is effected horizontally only utilizing common circuitry.