MR. JAMES MICHAEL MOORE, RPH
Pharmacy at Pullman St, Livermore, CA

4918624, Apr 17, 1990

Feb 5, 1988

7/152900

James M. Moore - Livermore CA
James F. Leighton - Livermore CA

The United States of America as represented by the United States
Department of Energy - Washington DC

G06F 1566, G06K 1500

364519

High printing speeds for graphics data are achieved with a laser printer by transmitting compressed graphics data from a main processor over an I/O (input/output) channel to a vector generator scan converter which reconstructs a full graphics image for input to the laser printer through a raster data input port. The vector generator scan converter includes a microprocessor with associated microcode memory containing a microcode instruction set, a working memory for storing compressed data, vector generator hardward for drawing a full graphic image from vector parameters calculated by the microprocessor, image buffer memory for storing the reconstructed graphics image and an output scanner for reading the graphics image data and inputting the data to the printer. The vector generator scan converter eliminates the bottleneck created by the I/O channel for transmitting graphics data from the main processor to the laser printer, and increases printer speed up to thirty fold.