Browse Prior Art Database

All Points Addressable Raster Scan Graphics for Cathode Ray Tube with Dual Ported Bit Map

IP.com Disclosure Number: IPCOM000051299D
Original Publication Date: 1981-Jan-01
Included in the Prior Art Database: 2005-Feb-10

Publishing Venue

IBM

Related People

Authors:
Kummer, DA Saenz, JA [+details]

Abstract

The system shown in Fig. 1 provides an all-points-addressable graphic capability, together with alphanumeric capability, using the timing signals from an existing raster scan cathode ray tube (CRT) adapter. The CRT adapter generates graphical information for defining alpha numerical characters. In addition, the CRT adapter also generates horizontal, vertical and clock signals, which are applied to the CRT to control the image thereon.