". . . Inverse
Assembler Not
Found"
This error occurs if you rename or delete the inverse assembler file that
is attached to the configuration file. Ensure that the inverse assembler
file is not renamed or deleted.
No Inverse
Assembly
Verify that the inverse assembler has been synchronized by placing an
opcode at the top of the display (not at the input cursor) and pressing
the Invasm key (see "Inverse Assembler" in Chapter 2).
Incorrect Inverse
Assembly
This problem is usually caused by a hardware problem in the target
system. A locked status line will often cause incorrect or incomplete
inverse assembly.
•
Check the activity indicators for status lines locked in a high or
low state.
•
Verify that the STAT, DATA, and ADDR format labels have not
been modified from their default values. These labels must
remain as they are configured by the configuration file.
•
Verify that the memory manager has been disabled. In most
cases, if the microprocessor memory manager remains enabled
you should still get inverse assembly, but it may be incorrect since
some of the execution trace was not visible to the logic analyzer.
•
Verify that storage qualification has not excluded storage of all
the needed opcodes and operands.
No Activity on
Activity Indicators
On the HP 1650A, HP 1651A, and HP 16510A Logic Analyzers if there
is no activity the fuse which allows power to the preprocessor interface
is probably blown. Check the fuse in the logic analyzer. On the other
logic analyzers, if there is no activity, one of the cables, board
connections, or preprocessor interface connections is probably loose.
Check all connections.
Capacitive
Loading
Excessive capacitive loading can cause signals to degrade, resulting in
incorrect capture by the preprocessor interface or system lockup in the
microprocessor. All preprocessor interfaces add additional capacitive
loading. The following techniques will reduce the capacitive loading:
•
Remove as many pin protectors, extenders, and adapters as
possible.
•
If multiple preprocessor interface solutions are available, try
using one with lower capacitive loading.
HP E2444A
Troubleshooting
80386DX/DXL Preprocessor Interface
A-3