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IP.com Disclosure Number: IPCOM000085969D
Original Publication Date: 1976-Jul-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Busch, DG: AUTHOR [+4]

Abstract

In a word processing system including a cathode-ray tube (CRT) display, it may be desirable to display special symbols that are the combination of more than one character with no escapement between characters, for example, Phi. When a large number of these constructed characters is included in text to be displayed, significant processing power and speed is required to translate the sequence of characters from which each special character is constructed into a single character used to access the CRT character generator.

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In a word processing system including a cathode-ray tube (CRT) display, it may be desirable to display special symbols that are the combination of more than one character with no escapement between characters, for example, Phi. When a large number of these constructed characters is included in text to be displayed, significant processing power and speed is required to translate the sequence of characters from which each special character is constructed into a single character used to access the CRT character generator.

For display messages that must be permanently stored in the system logic, storage locations and processor utilization and power are conserved by storage of the actual display font codes, themselves, for all of the text of these messages, rather than all of individual characters comprising the character and other symbols of the messages.

When the messages are sent to the display device, they are preceded and succeeded by FONT IMAGE BEGIN and FONT IMAGE END codes, respectively, which instructs the system to perform no translation of any of the codes or code sequences. Thus, the character generator displays a separate character for each code received, even though certain complex symbols are displayed that would, if typed from a keyboard, require construction from more than one character.

Besides the FONT IMAGE BEGIN and FONT IMAGE END codes, there are five other codes that require active processing and translation. An INV...