On Wed, 23 Jun 1999 10:16:27 +0100 (BST) 
 Andrew Phillips <atp@mssl.ucl.ac.uk> wrote:

 > Johnny Billquist Wrote:
 > >
 > >Obscure note on the pdp-11: it's actually middle-endian. :-)
 > >A 32-bit integer is stored as 3412.
 > >(Using the FP-11 for 32-bit stuff)
 > >
 > 
 >      There's not many machines that have an Endian type
 >      defined specifically for them. 

Part of the PDP-11's weirdness here is the fact that you're talking
about something larger than a wordsize.  Going strictly on wordsize,
the PDP-11 is little endian (1,2).

However, for whatever reason, the most significant word of a longword
was stored first in memory; I don't remember if that was a software
convention, or a hardware thing.

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