Triggering Hints
Storage Qualification
Any use of storage qualification in the trigger sequence will result in error
messages in the inverse assembly column in the Listing. The preprocessor
interface communicates its switch settings and dynamic AERR/BINIT
observation policies to the logic analyzer via a repeating serial frame on a
preprocessor-generated signal. Storage qualification interrupts this serial
frame, resulting in transaction tracker/disassembler errors.
Triggering on address and transaction type
To trigger on a specific address and transaction type, use the A35-32,
A31-00, and TranTy labels, together with the TranTy label symbols. The
symbols identify each transaction type uniquely, except for Interrupt
Acknowledge and Special Transactions, which are combined into one symbol.
Triggering on data and transaction type
There is no guaranteed method of triggering on a particular transaction type
or address ANDed with a particular data value in a target system with
overlapping transactions. Although the Listing displays a transaction type
and 8-byte data value on the same line when Transaction Display Mode is set
to Short, this alignment is the result of post-processing and cannot be used
for triggering. The preprocessor interface hardware captures this
information on different states. A trigger specification could be defined to
find a certain transaction type in the Request A phase, then trigger on a data
value qualified by DRDY# asserted; however, by the time the data pattern is
found, it could belong to a different transaction.
Preprocessor Interface for the Pentium II Processor
2-21
Summary of Contents for E2466C
Page 10: ...1 Setting Up the Preprocessor Interface ...
Page 31: ...1 22 Preprocessor Interface for the Pentium II Processor ...
Page 32: ...2 Analyzing the Pentium II Processor ...
Page 53: ...2 22 Preprocessor Interface for the Pentium II Processor ...
Page 54: ...3 Preprocessor Interface Hardware Reference ...
Page 77: ...3 24 Preprocessor Interface for the Pentium II Processor ...
Page 78: ...A If You Have a Problem ...