5.2.1 install error

[Gable Barber]

Hello,
I am trying to install FreebSD 5.2.1 from CD, on the following box, I
am getting an error when it is installing /usr/ports.

The gear:

Duron 1000
512meg RAM
Mylex Acceleraid 150 (DAC960)
4x9G IBM SCSI drives (7200rpm)

The error :

anic: free: address 0xc978f00 has not been allocated

cpuid:0

syncing discs 

from there it counts about 4 lines of 4 digit codes, then reboots..

I have searched the questions archive, and google.com/bsd without much
avail. There were 2-3 similar posts with no follow ups.

I thouhgt it might be a RAM problem, so I have tested with 2 different
modules (256each). The error continues to happen.

Possibly CPU?

I am at a loss, thank you in advance for any ideas...

Gable