Browse Prior Art Database

Temporary Function Retention

IP.com Disclosure Number: IPCOM000049751D
Original Publication Date: 1982-Jul-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 4 page(s) / 57K

Publishing Venue

IBM

Related People

Howell, DM: AUTHOR [+2]

Abstract

This article describes a word processing system which retains selected temporary format instructions after a required carrier return or the like. Any one or more functions may be retained, including indent tab, temporary left margin, temporary right margin, temporary tab, and temporary linespace. Control is by keyboard input. The code for required carrier return has bit positions reserved to specify to the program which of the temporary format instructions are to be retained.

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Temporary Function Retention

This article describes a word processing system which retains selected temporary format instructions after a required carrier return or the like. Any one or more functions may be retained, including indent tab, temporary left margin, temporary right margin, temporary tab, and temporary linespace. Control is by keyboard input. The code for required carrier return has bit positions reserved to specify to the program which of the temporary format instructions are to be retained.

System Description

A typical word processing system is illustrated in Fig. 1. The processor is driven by a program stored in program memory and in turn provides signals on the address bus, as required, and receives from and provides data to the data bus under program control. The text being keyed by the typist is stored in document memory along with formatting parameters which describe the location of text on a page.

Two refresh random access memories (RAMs) and two separate programs are provided, which take the unformatted text keyed by the typist, format it, normally utilizing the active format parameters, and store it in its respective refresh RAM.

The fax or page image RAM contains information which, when displayed, provides an Image of the entire page, as it will appear on hard copy, including the ability to discern words and even characters in their proper location on the display. Individual characters, however, when displayed cannot be read. Characters in this refresh RAM are essentially represented by an unreadable font because the area devoted to the character has become too small to read.

The text refresh RAM display, however, represents the characters in a size that is easily readable but contains only a limited portion of the page. Hardware (not shown) provides a video signal to a CRT monitor utilizing the particular refresh RAM selected by the typist for display.

Finally, certain registers utilized in the function retention are located in the register RAM. Fig. 2 is more specifically directed to this function retention feature.

Detailed Description

This feature is implemented through the addition of a software routine in the keyboard module. That is, after the system finds that the typist has struck a key on the keyboard, the system enters the keyboard module to determine what operation should be performed. The necessary logic may be placed at the start of the keyboard module

Use of this feature may occur during initial keying of the document or while the document is being reused. In keying the text shown as Fig. 3, the typist keys the characters shown in document memory (Fig. 4). The "TL" code or temporary left margin causes the left margin of the document to be increased from 6 spaces, as shown in Fig. 3. to 10 spaces indicated by the code being bracketed by TL's. The second TL is necessary only as an expedient to allow search

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through document memory in either direction. Next. the required tab code cau...