Revision 1.12 of pipes section of working document

Greetings ITC Techies,

I've completed a number of updates to the pipes chapter of
Brian's newly re-organized working document.

I will send Brian the updated word document which he can
post on the web site. I will also attempt to send it to
the reflector in a separate e-mailing as a compressed .zip
file (but results not guaranteed !).

All changes since the last FrameMaker version of this document
(revision 1.11) have been shown with Word tracking highlights.

Here's a summary of my updates:

- Clean up formating from Brian's conversion from FrameMaker
   (there were a lot of polluted formats that needed to be removed).

- I have incorporated the changes to restrict the pipe_id
   space by allowing to be a user specifiable static value on
   the hardware side as described in this e-mail:

     http://www.verilog.org/itc/hm/0920.html

   This will allow tighter control of pipe ID values - a
   concern raised by Jason.

- Separated out section on flushing semantics, eom auto-flush.
   Added clarifications from Shabtay's object pipes proposal.

- Added a number of minor corrections

-- johnS

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