All Points Addressable Raster Scan Graphics for Cathode Ray Tube with Dual Ported Bit Map
Original Publication Date: 1981-Jan-01
Included in the Prior Art Database: 2005-Feb-10
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.