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Font Download Command for the IBM ASCII Datastream

IP.com Disclosure Number: IPCOM000036869D
Original Publication Date: 1989-Nov-01
Included in the Prior Art Database: 2005-Jan-29
Document File: 2 page(s) / 69K

Publishing Venue

IBM

Related People

Brown, JK: AUTHOR [+3]

Abstract

Disclosed is an IBM ASCII datastream format for downloading fonts to a printer (see Fig. 1). It uses a technique of downloading a font header record followed by one or more individual character header record blocks.

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Font Download Command for the IBM ASCII Datastream

Disclosed is an IBM ASCII datastream format for downloading fonts to a printer (see Fig. 1). It uses a technique of downloading a font header record followed by one or more individual character header record blocks.

This technique of downloading fonts does not require that a complete font be downloaded as one continuous string of commands. It is possible to only load the characters required to print a job as needed. This results in efficient use of memory resources and reduced download overhead.

Other font download utility functions are provided by this command. These utilities include download font deletion, downloading a font that references existing fonts, and downloading to a Battery Backed-up RAM card (see Fig. 2).

The font download command contains four ways of deleting fonts that have been downloaded to the printer. A subcommand parameter is used to indicate the method of deletion. One subcommand allows all of the fonts downloaded to the printer to be deleted. Another subcommand will allow only the fonts marked temporary to be deleted. There is also a subcommand to allow only the font marked permanent to be deleted. Finally, there is a subcommand to selectively delete individual downloaded fonts.

Another font download utility provided by this command is to allow the downloading of a font header which references an existing font. This allows one to create a font with minor changes by referencing an existing...