Motorola Corporation

James J Krause

John R Welk

David L Tenney

Michael L Singer

William C Hepker

David J Thayer

Disclosed is a process which may be used in a communication arrangement between two stations. In at least one of the stations, an MPU is utilized to control an internal operating system and a baud rate generator. The MPU performs periodic self tests to determine how busy it is, and if it is not too busy with internal tasks it calls a baud rate routine to adjust the rate at which the stations are communicating. This periodic testing allows the baud rate to be adjusted according to current environmental conditions. Further, a timer is provided, internal to the MPU, which is used to prevent the baud rate routine from being executed too frequently.

Optimum baud rate transmission system

A CRT in a CRT device is degaussed following a timed period of device inactivity and while the screen of the CRT is darkened, as well as at device turn-on or at manual activation. The screen stays darkened until data is inputted, and degaussing reoccurs during each subsequent timed period of inactivity.

Logic controlled degaussing system

A preconverged color display station is disclosed which is compatible with a computer controlled control unit that provides electrical convergence control signals. Compatibility is obtained by causing the control unit to transmit the electrical convergence signals to the screen storage memory RAM (random access memory) which normally stores information defining the character and character attributes to be visually provided by the display station CRT screen. The stored convergence signals are read back to the control unit from the screen RAM. After all of the convergence signals have been received by the display station and prior to the transmission of character and character attribute information signals to the screen RAM, the contents of the screen RAM is erased. Subsequently, the contents of the screen RAM, which now contains character display information signals, is read out and utilized to define a visual display on a CRT. During the time that the screen RAM contains electrical convergence signals, the video of the CRT is blanked. Selection of any of at least three basic colors is provided by the color display station whether or not electrical convergence control signals are provided thereto and whether or not a monochrome or multicolor control unit is coupled thereto.

Growing community of inventors

Hanover Park, IL, United States of America

James J Krause