Thanks for looking and any help you can give me.

I get KPs more frequently. Have not added any new devices or memory. Running a Mac G5 Quad, OS 10.5.5 ... here is the latest report:



Wed Nov 19 14:21:32 2008


Unresolved kernel trap(cpu 2): 0x400 - Inst access DAR=0x0000000055A21564 PC=0x0000000000000000
Latest crash info for cpu 2:
Exception state (sv=0x66215c80)
PC=0x00000000; MSR=0x40009030; DAR=0x55A21564; DSISR=0x40000000; LR=0x00000000; R1=0x6DD1F850; XCP=0x00000010 (0x400 - Inst access)
Backtrace:
0x00000000
Proceeding back via exception chain:
Exception state (sv=0x66215c80)
previously dumped as "Latest" state. skipping...
Exception state (sv=0x6dc5e280)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)

BSD process name corresponding to current thread: kernel_task

Mac OS version:
9F33

Kernel version:
Darwin Kernel Version 9.5.0: Wed Sep 3 11:31:44 PDT 2008; root:xnu-1228.7.58~1/RELEASE_PPC
System model name: PowerMac11,2
panic(cpu 2 caller 0xFFFF0004): 0x400 - Inst access
Latest stack backtrace for cpu 2:
Backtrace:
0x0009B518 0x0009BEBC 0x00029DD8 0x000AF410 0x000B2AF8
Proceeding back via exception chain:
Exception state (sv=0x66215c80)
PC=0x00000000; MSR=0x40009030; DAR=0x55A21564; DSISR=0x40000000; LR=0x00000000; R1=0x6DD1F850; XCP=0x00000010 (0x400 - Inst access)
Backtrace:
0x00000000
Exception state (sv=0x6dc5e280)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)

BSD process name corresponding to current thread: kernel_task
eV

You may not have added more memory but that doesn't mean that the existing memory can't go bad. Read Resolving Kernel Panics for hints about troubleshooting.