Appeal No. 1998-2767
Application 08/391,541
value to the first value to indicate an error if they are
different. The invention is further illustrated by the
following claim.
1. In a computer sytem comprising a bus, a processor
coupled to the bus, a transceiver, containing a first register
and a second register, coupled to the bus, a diagnostic state
machine coupled to the bus and associated with a first address
space defined by addresses on the bus, and a memory coupled to
the bus and associated with a second address space defined by
addresses on the bus, the second address space being related
to the first address space such that locations in the first
address space correspond with locations in the second address
space, a method for diagnosing and isolating faults in the
computer system comprising the steps of:
writing, from the processor onto the bus, a first value
to a first address within the first address space;
latching the first value in the first register using the
diagnostic state machine;
writing the first value from the first register to a
second address within the second address space, the second
address being associated with the first address in the first
address space;
reading, by the processor, a second value from the memory
over the bus, at the second address; and
comparing, by the processor, the second value to the
first value to indicate an error if they are different.
The references relied on by the Examiner are:
Mizuta 4,979,144 Dec. 18, 1990
Davis et al. ( Davis) 5,239,637 Aug. 24, 1993
3
Page: Previous 1 2 3 4 5 6 7 8 9 10 Next
Last modified: November 3, 2007