IEEE Computer Volume 13 Number 9 -- New Products
Original Publication Date: 1980-Sep-01
Included in the Prior Art Database: 2005-Nov-11
Software Patent Institute
Demetrios A. Michalopoulos: AUTHOR [+3]
THIS DOCUMENT IS AN APPROXIMATE REPRESENTATION OF THE ORIGINAL.
This record contains textual material that is copyright ©; 1980 by the Institute of Electrical and Electronics Engineers, Inc. All rights reserved. Contact the IEEE Computer Society http://www.computer.org/ (714-821-8380) for copies of the complete work that was the source of this textual material and for all use beyond that as a record from the SPI Database.
New Products Editor: Prof. Demetrios A. Michalopoulos California State University, Fullerton
(Image Omitted: Operation of the MLT-500 tape cleaner/tester is simplified by straight loading and a few clearly worded controls. Infrequently used switches for selecting functions are locked in a separate management control compartment to minimize human error. A switch interlock prevents misoperation if a wrong button is pushed during operation.)
Computer tape tester records errors once every 4"
Essentially a manual-load version of the SIT-80, the Dennison Kybe MLT-500 cleaner/ tester for maintaining and evaluating 800-, 1600-, and 6250-bpi computer tapes differentiates betweeri signal dropouts that are within a system's error correction routines and those that will cause an abort, a testing technique that emulates the tape transport's 1600-bpi error recognition routines.
The MLT-500 identifies tapes that have low error counts yet have a high potential for READ FAIL. For 625~bpi tapes, the unit records one-track, two-track, and three-track dropouts.
Counted on LED counters, errors are graphically displayed on a circular chart by a silent, inkless thermal chart recorder. According to the company, the MLT-500 can record errors once every 4N, which is compatible with the short skip distances of most tape drives.
Dropout levels can be computer-correlated at low, normal, or critical levels, and are operator selectable. Utilization of AGC circuitry eliminates the need for operator calibration.
Reader Service Number 16
Stand alone computer brings graphics to student lessons
A stand-alone computer system, Regency Systems' RC-I integrates graphics hardware with software that allows users to write, edit, store, and recall student lessons.
The system includes a CRT with selfcontained bit-mapped memory or plasma panel. The bit- map display provides 512 x 512 individually addressable dots and displays 64 characters x 32 lines at a rate of 8000 cps. According to Regency Systems, the terminal provides "instantaneous'' displays and animation with new full- screen displays in less than '/ second. Included is a high- resolution touch panel for human interaction.
Other hardware features are a 4-MHz Z80 microprocessor, 65K bytes of solid-state memory, an RS-232 interface, floating-point and scientific function hardware for highspeed number crunching, and dual 8N HOppy disk drives providing 2.5M bytes of additional storage -- approximately 40 hours of lessons per floppy disk.
IEEE Computer Society, Sep 01, 1980 Page 1 IEEE Comp...