Browse Prior Art Database

Word Processor Scrolling Device

IP.com Disclosure Number: IPCOM000045037D
Original Publication Date: 1983-Jan-01
Included in the Prior Art Database: 2005-Feb-06
Document File: 3 page(s) / 39K

Publishing Venue

IBM

Related People

Carpenter, PC: AUTHOR

Abstract

A scrolling device is described which can be connected between a keyboard and a word processor to provide non operator controlled scrolling of images displayed. The scrolling device simulates entries from a keyboard to automatically exercise the display device so that the display on the screen is changed at regular intervals.

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Word Processor Scrolling Device

A scrolling device is described which can be connected between a keyboard and a word processor to provide non operator controlled scrolling of images displayed. The scrolling device simulates entries from a keyboard to automatically exercise the display device so that the display on the screen is changed at regular intervals.

The scrolling device generates a series of pulses like those normally generated by the character and function keys on the keyboard of a word processor. The device is merely plugged into the word processor between the keyboard and the electronics of the word processor.

The unit has four manual controls: namely, scroll rate potentiometer 1, reset/start 2, mode switch 3, and units/tens switches 4. Initially the user would determine the maximum number of pages of image data to be scrolled and enter this number in the units/tens switches 4. The mode switch 3, when in the normal position, enables the keyboard to operate unimpaired, and in the auto position, it causes the scrolling device to generate automatic signals to the word processor. Potentiometer 1 is set for the desired length of time a page is to remain on the screen and reset/start 2 is depressed to begin the operation of the device.

Potentiometer 1 controls the clocking frequency of astable multivibrator 5. A synchronous self decoding ten-point stepper, consisting of two flip-flops 6 and 7 and a shift register 8, moves a pulse through a ring of ten successive steps. The first step to be used is labeled "go to" on line 9. When this line is activated, matrix 10 causes a character identical to the "go to" character originating at the keyboard to be presented to serializer 11. The same step pulse delayed through inverter 12 loads the character into the serializer. Clock 13, which is set to approximate the keyboard's clock, causes the character to be s...