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Impact Printer Having Cursor Draw Function to Print Box Graphics

IP.com Disclosure Number: IPCOM000037537D
Original Publication Date: 1989-Mar-01
Included in the Prior Art Database: 2005-Jan-29
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Reed, WH: AUTHOR

Abstract

Software enables an impact printer to be utilized to print box graphics.

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This is the abbreviated version, containing approximately 86% of the total text.

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Impact Printer Having Cursor Draw Function to Print Box Graphics

Software enables an impact printer to be utilized to print box graphics.

A personal computer (PC) program has a feature called cursor draw in which box graphics can be produced. Because an impact printer is not an all points addressable printer, it is not capable of printing corners of a box. For example, if hyphens were used to print horizontal portions of a box and vertical bars to print vertical portions of a box, both a hyphen and a vertical bar cannot be at the same location as would be required at a corner of a box or at any intersection of vertical and horizontal lines.

Code points from the box graphics of the PC program have ASCII values 179-218. Whenever an impact printer receives from the PC program an ASCII 196 (one horizontal line) or 205 (two horizontal lines), the software causes the impact printer to substitute a hyphen for either of these code points. When an ASCII 179 (one vertical line) or 186 (two vertical lines) is received by the impact printer, the software causes it to print a broken vertical bar if the printer is for use in the United States or Germany and to substitute an exclamation point in any other country in which the impact printer is used.

When an impact printer receives any of the other ASCII values between 179 and 218 besides 179, 186, 196, and 205, the printer will substitute a "+" for each such code point. This results in a box being formed for a United States or ...