Browse Prior Art Database

Text Formatting for Display

IP.com Disclosure Number: IPCOM000077160D
Original Publication Date: 1972-Jun-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Boyd, WW: AUTHOR

Abstract

A text to be displayed at 18 is completely formatted during the loading of a refresh butter.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 60% of the total text.

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Text Formatting for Display

A text to be displayed at 18 is completely formatted during the loading of a refresh butter.

No formatting is done between refresh buffer and a character generator since formatting performed prior to loading of characters in the refresh buffer is so complete, that data stored in the refresh buffer is identical to data and format which would occur if the unformatted characters were input to a printer. Thus the system is free from the time constraints which were imposed in prior art, due to the formatting during transfer of data codes from a refresh buffer to a character generator.

Data and function codes are keyed into a bulk dynamic shift register (DSR) 3 by a keyboard 1. DSR 3 in turn loads a smaller intermediate dynamic shift register (DSR) 8 under control of a control logic 6. DSR 8 sequentially provides unformatted codes, shown in Fig. 3, to format control 13 under control of a control logic 11. In an overstrike operation wherein codes are keyed in the sequence labeled OVERSTK in Fig. 3, data characters X's are sequentially written into a refresh buffer 16 which is a random-access memory under control of format control 13. Each time a backspace code BS is encountered, a memory address register (MAR) for buffer 16 is counted down so that subsequent data characters Y's are sequentially loaded over the previously written characters. Thus the data to be displayed is stored in buffer 16 in a completed format shown in Fig. 2. In the case...