480-Pel Feature for Image Generation Subsystem of a System Printer
Original Publication Date: 1989-Feb-01
Included in the Prior Art Database: 2005-Jan-27
An image generation subsystem for a 240-pel system printer is shown in Fig. 1. This is an all-points-addressable image generation subsystem (IGS). The IGS shown in Fig. 2 is for a 480 pel version. The 480 pel is compatible with the 240 pel IGS. The basic architecture of the 240 pel IGS is used in the 480 pel IGS. The 480 pel version takes advantage of the fact that no increase in resolution in the granularity is required. It also uses the same code to control, and except for image data requires no greater data channel rate when printing. The 480 pel adds three pattern stores and three raster buffers to the 240 pel IGS. By making the data from each PS accessible to each RB the 480 pel IGS uses the same architecture as the 240 pel. A brief explanation of the 240 pel architecture follows: There are 11 blocks shown in Fig. 1.