Browse Prior Art Database

Automatic Alignment to Correctable Characters

IP.com Disclosure Number: IPCOM000062360D
Original Publication Date: 1986-Nov-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Cecil, RH: AUTHOR [+2]

Abstract

Since many imbedded control codes in an electronic typewriter having a memory cannot be corrected except at the relocate point, which is the furthest typed character on the page, software allows a cursor to be positioned only to those characters that can be corrected when moving through the correction buffer during automatic correcting. Various imbedded control codes such as tabs, font switch, format switch, indent set, start/end center, and start/end decimal tabs, for example, are correctable only at the relocate point even though they are displayed with the correctable text. The software causes the cursor to automatically move over these control codes to the next correctable character in the proper position.

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Automatic Alignment to Correctable Characters

Since many imbedded control codes in an electronic typewriter having a memory cannot be corrected except at the relocate point, which is the furthest typed character on the page, software allows a cursor to be positioned only to those characters that can be corrected when moving through the correction buffer during automatic correcting. Various imbedded control codes such as tabs, font switch, format switch, indent set, start/end center, and start/end decimal tabs, for example, are correctable only at the relocate point even though they are displayed with the correctable text. The software causes the cursor to automatically move over these control codes to the next correctable character in the proper position. For example, if the cursor is over "b" in the sequence "a/font switch/b" and a backspace is performed by the operator, the cursor will automatically move left to be over "a." With the cursor over "b" and two erases are keyed, the first will erase the "b" and the second will perform a backspace to the "a" and erase. When paper move keys are employed to position to an existing line in a vertical direction, the software has a positioning algorithm to add up enough escapement to position the active point to the proper place and move over any controlled codes to the next alphanumeric character or space.

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