If The Prompt After Rst Is "U; If The Prompt After B Is "M>" With Error Messages; If The Prompt After B Is "M>" With No Error Messages; If You Can Get To The "M>" Prompt - Agilent Technologies E5900B User Manual

processor mask revision.
• If the prompt is "U>", the processor failed to stop soft or hard. Check reset
lines, mask revision, processor type and firmware version.
If the prompt after rst is "U>"
The HRESET and SRESET lines are working. Continue with more tests:
4 Enter the break command:
U>b
M>
If the prompt after b is "M>" with error messages
If you see: "!ERROR 145! Unable to soft stop - freezing the processor clocks"
the processor is hard stopped. Check the mask revision, processor type, and
firmware version. If all of these look good, the target may not be terminating
cycles (pending external bus cycles). Successive run ("r") and step ("s")
commands will fail. The processor may have fetched an invalid instruction.
Check the value of the PC (IAR):
M>reg PC
reg PC=xxxxxxxx
M>
If the value is fff00100, the processor had a problem accessing the boot ROM
and crashed during boot.
Processor and/or board level reset is required to recover from "freezing
processor clocks" -- register and memory commands should still work.
If the prompt after b is "M>" with no error
messages
Everything is still working correctly. Continue with more tests:
If you can get to the "M>" prompt
5 At the "M>" prompt, check register and memory access:
M>reg GPR0
reg GPR0=xxxxxxxx
M>reg GPR0=12345678
Agilent Technologies Emulation for the PowerPC 400/600/700
Chapter 12: Troubleshooting the Emulation Probe
Problems with the Target System
167