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Multipass Printing Operation

IP.com Disclosure Number: IPCOM000041925D
Original Publication Date: 1984-Mar-01
Included in the Prior Art Database: 2005-Feb-03
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Lovell, CJ: AUTHOR

Abstract

This article relates to multipass printing wherein the characters in a line are formed by a plurality of passes. The concept is also applicable to CRT displays in which the characters on each line are refreshed through multiple passes. In a representative embodiment in printing, a single translation is required for each pass, i.e., the first or upper segment of the line of characters being printed is data scanned followed by the passing on of the data presented by that scan, and so on, for each of the subsequent scans. In a four-scan process there is a table for each of the scans. Thus, as each position is being passed in each scan, the particular data representation being read in the scan will lead to a position in the table associated with the scan.

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Multipass Printing Operation

This article relates to multipass printing wherein the characters in a line are formed by a plurality of passes. The concept is also applicable to CRT displays in which the characters on each line are refreshed through multiple passes. In a representative embodiment in printing, a single translation is required for each pass, i.e., the first or upper segment of the line of characters being printed is data scanned followed by the passing on of the data presented by that scan, and so on, for each of the subsequent scans. In a four-scan process there is a table for each of the scans. Thus, as each position is being passed in each scan, the particular data representation being read in the scan will lead to a position in the table associated with the scan. It should be noted that this address data and, consequently, the same piece of code being read in each of the four scans will lead to the same position in each of the four tables. However, since the four tables are different, the address read at that particular position in each table will lead to different display data depending on which of the four tables is being read. In particular, when a character is to be presented on the display, and the presentation process requires more than one pass per character line, a specific method that would allow the minimum translation time would involve the following general steps. * Describe each character by its component parts (translation string) for each pass includi...