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Method to Circumvent Certain Printer Code Points in a Data Stream

IP.com Disclosure Number: IPCOM000063943D
Original Publication Date: 1985-May-01
Included in the Prior Art Database: 2005-Feb-18

Publishing Venue

IBM

Related People

Authors:
Heath, AW [+details]

Abstract

A method is described to permit the capability of some advanced function text printers operating in a text processing environment to obtain the same results that these functions provide, even though the normal control codes that bring these functions into operation cannot be imbedded in the text stream printer. The Disc Operating System (DOS) for the IBM Personal Computer (PC) controls the printing of text to the printer when printing is done in a background mode. As a consequence, several critical code sequences, such as "Set margins," used to control the printers are altered by DOS. Similarly, the control code sequences required by some printers to print at 5.3 lines per inch are altered by DOS when printing so an erroneous line density would result on the printer when being controlled by DOS.