Nortel Networks Corporation

Northern Telecom Limited

Jay D Jeter

Ronald J Landry

Gerry R Dubois

Patrick S Milligan

A computer system for diagnosing and isolating faults in the computer system. A first value is written from the processor using the bus a first address within the address space of a diagnostic state machine. The value is latched in a first register and written from the first register to a second address in the memory. By reading a second value from the memory at second address, the processor compares the second value to the first value to indicate an error if they are different.

Computer system and method for diagnosing and isolating faults

A computer system for controlling the mode of operation of a data cache. When a DMA state machine detects a DMA cycle to a memory block, the machine interrupts the processor so the processor sets a new value of the DMA state to control the mode of cache operation associated with the block.

Growing community of inventors

Allen, TX, United States of America

Jay D Jeter