On Fri, 17 Dec 1999 17:14:46 -0800 
 Andy <andy@softbook.com> wrote:

 > where can I find more info on what Data Storage interrupt is and what may
 > cause it

A DSI is a non-instruction fetch address fault on the PowerPC.  It happens
when you access an address that is not mapped by either the BATs or the
Segment Registers/HTAB.

        -- Jason R. Thorpe <thorpej@nas.nasa.gov>