Documentation on Alpha Assembly language

[Simon Brown <simon@cliffestones.demon.co.uk>]

Evening all,

Is there any good documentation / books on alpha assembly language out 
there? I've found this:
http://www.amazon.co.uk/ALPHA-Architecture-Programmers-James-Evans/
dp/0130814385/ref=wl_it_dp/203-1235205-4543119?
ie=UTF8&coliid=I1S7PO4ZVYJCI3&colid=22GEJLNO40OO8

but not much else. I've no good reason for being interested, I just 
am :-)

Thanks

Simon