Tandem Computers Incorporated

Kenneth G Koenig

William R Goodman

Apparatus for providing a relatively constant clocking signal to a serial input/output device from a microprocessor regardless of whether the microprocessor is executing a normal instruction cycle or an extended cycle. A state machine is driven by the same clock which drives the microprocessor and a signal from the microprocessor indicating the presence of a normal or extended instruction cycle. The state machine and the clock which drives the microprocessor drive a clocking circuit which produces a first waveform if a normal instruction cycle is being executed, and a second waveform if an extended instruction cycle is being executed. Both waveforms are edge synchronized to the clock which drives the microprocessor.

Electronic communication clocking mechanism

The disclosure relates to the use of a flip flop or the like to provide additional protection against the destruction of data located in microprocessor system support circuits.

Growing community of inventors

Campbell, CA, United States of America

Kenneth G Koenig