Hi, This is a very difficult databook to obtain. It took me about 4 years to obtain one. Contains info and tech notes on the A1xx class of INMOS DSP processors including the IMSB009 Quad-A100 + transputer processing board... http://cgi.ebay.com/Digital-Signal-Processing-Databook-INMOS-PB_W0QQitemZ697 8750783QQcategoryZ69479QQssPageNameZWDVWQQrdZ1QQcmdZViewItem Cheers, Ram