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Magnetic Cassette Input/Output Device and Visual Display Unit

IP.com Disclosure Number: IPCOM000078803D
Original Publication Date: 1973-Mar-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 14K

Publishing Venue

IBM

Related People

Scrima, RA: AUTHOR

Abstract

MAGNETIC CASSETTE INPUT/OUTPUT DEVICE To minimize the necessity of printing large volumes of forms on computer printer output devices, the present system embodies a magnetic cassette input/output device which records information on multiple magnetic cassettes for later use with visual display units, capable of converting the tape records into visual images. The device can also read the tape records for computer input and error checking. Standard read/write heads and drives are used and the unit operates through a normal interface to computers. When the information on a given cassette becomes obsolete, it is sent back to the data-processing department to be rewritten with new information.

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Magnetic Cassette Input/Output Device and Visual Display Unit

MAGNETIC CASSETTE INPUT/OUTPUT DEVICE To minimize the necessity of printing large volumes of forms on computer printer output devices, the present system embodies a magnetic cassette input/output device which records information on multiple magnetic cassettes for later use with visual display units, capable of converting the tape records into visual images. The device can also read the tape records for computer input and error checking. Standard read/write heads and drives are used and the unit operates through a normal interface to computers. When the information on a given cassette becomes obsolete, it is sent back to the data-processing department to be rewritten with new information.

Existing logic circuits would record tape records using standard information codes, or if a reduction in the number of data tracks is desired, a frequency modulation type of code. Normal error checking circuits would be used as well as read, erase and rewind functions. The unit would record information on multiple cassettes at a given time for use later on the self-contained visual display units. A standard computer interface would be utilized. Records could be blocked in the normal tape output manner, or a special record grouping arrangement could be used that would block records to readout capacity size of the display device. LIGHT-EMISSION DIODE DISPLAY.

Existing state of the art logic circuits would fire a matrix pattern of light-emission diodes (LED's), corresponding to the character read on tape. The tape records would be blocked by tape record marks or a counter circuit, which would match the number of characters read with the readout capacity of the device. A block of information would be read from the tape into temporary storage in the form of latch registers, core memory or other type of memory devices. The information stored in these registers would feed logic blocks that would light the appropriate light-emission diode. Controls would be provided to advance or rewind tape. When the tape is advanced, the display would be reset and new information read in. The units could be designed to read existing tape cassettes that were created on magnetic data inscribers.

A centrally located unit would have a much larger screen and the ability to display graphically or pictorially. Also, functions such as auto search to a given number would be employed. Rotary knobs or push-button switches would be set by the operator to a number desired. This would fe...