On Boot - Memory Address Not Aligned

[jacko24]

On a Sparc5, I am getting "Stack Underflow" (3 times) followed by "Memory Address Not Aligned" and then stopping at Ok prompt. When doing a "test-all" I see IAR errors such as:
IAR Error: Actual=80 Expected=0
IAR Error: Actual=80 Expected=1
.... etc to about 5 or 6

I have not been able to find a resources explaining what those errors mean.

Most reading on the web suggests memory modules placement, however the machine ran fine for several weeks and several reboots, until one day this started. I have swapped in/out 4 diff memory modules, and I am beginning to doubt that the modules are to blame.

If anyone has any suggestions please reply.

Thanks