To Align The Inverse Assembler - HP E2416B User Manual

To align the inverse assembler

The 80196 microprocessor does not provide enough status information for
the inverse assembler to determine where an instruction starts. To ensure
correct disassembly, you may need to point to the byte of the 16-bit word
that contains the first word of an opcode fetch. Once aligned, the inverse
assembler will disassemble from this state through the end of the screen.
Use the following procedure to align the inverse assembler:
Select a line on the display that you know contains the first word of
1
an opcode fetch.
Roll this line to the top of the display.
2
Do not roll the instruction to the line number field at the left center screen. In
the State Listing figure on page 3-10, line -5 is the top of the display.
Select the appropriate field for your analyzer.
3
For the HP 16600/700 series analyzers, select "Invasm," then select
a
"Align." A pop-up menu appears with the following choices:
High
Low
For the other logic analyzers, select "Invasm Options" and use the
b
"Code Synchronization" submenu. The same choices as above are
available.
Select the choice that identifies which byte of the 16-bit word
4
contains the start of the instruction fetch, then select "Align."
The listing inverse assembles from the top line down. Any data before the
top of the display is left unchanged.
Rolling the display up inverse assembles the lines as they appear on the
bottom of the display. If you jump to another area of the display by entering
a new line number, you may need to re-align the inverse assembler by
repeating steps 1 through 4.
Each time you inverse assemble a block of memory, the analyzer will keep
that block in the inverse assembled condition. You can inverse assemble
several different blocks in the analyzer memory, but the activity between
those blocks will not be inverse assembled.
HP E2416B 80196 Analysis Probe
Using the Inverse Assemblers
To align the inverse assembler
3-11