The AXPpci33 is a fairly old design and during it's firmware development
PPBs where just a gleam in some chip designer's eye.  Well, maybe not but
you get the idea.  To add PPB support to the AXPpci33 firmware would be a
significant development effort and due to relatively low volumes of AXPpci33
board sold, it's not cost effective to due so.

So it's highly unlikely that you'll ever PPB support for the AXPpci33.

The EB164 and PC164 motherboards are recent to support PPBs...
-- 
Matt Thomas               Internet:   matt@3am-software.com
3am Software Foundry      WWW URL:    http://www.3am-software.com/bio/matt.html
Westford, MA              Disclaimer: I disavow all knowledge of this message