Browse Prior Art Database

Controller Architecture for Advanced Function Dot Matrix Printer

IP.com Disclosure Number: IPCOM000038999D
Original Publication Date: 1987-Apr-01
Included in the Prior Art Database: 2005-Feb-01

Publishing Venue

IBM

Related People

Authors:
Harwood, FC Leontiades, K Marshall, DW Rawson, AR Steup, BB [+details]

Abstract

Advanced function printers accept high level vector graphics commands as well as character codes and bit images. Such printers typically print vectors by emulating graphics displays, which requires a full size bit map of the page, or by emulating pen plotters, which requires both forward and reverse forms movement. The present printer controller architecture embodiment utilizes a task handling concept which provides complete freedom of image generation for both text and graphics without either of these requirements. The figure shows that the printer controller microcode is divided into three parts: the Attachment, the Dot Generator, and the Mechanism Controller.