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Path: utzoo!linus!decvax!aps
From: aps@decvax.UUCP (Armando P. Stettner)
Newsgroups: fa.info-vax
Subject: Re: 730 Unibus speed revisited.
Message-ID: <214@decvax.UUCP>
Date: Sat, 17-Sep-83 19:33:48 EDT
Article-I.D.: decvax.214
Posted: Sat Sep 17 19:33:48 1983
Date-Received: Sun, 18-Sep-83 04:28:18 EDT
References: <823@ucbvax.UUCP>
Organization: DEC UNIX Engineering Group, Merrimack, NH
Lines: 14

The current VAX Hardware handbooks are not detailed enough
to detail the UNIBUS.  As I recall, they only discuss the
protocol in broad terms.  (See the DEC Bus Handbook for more
details.)  The technical descriptions that are available for
the VAX processors provide much more details about the particular
implementations.

By the way, when you compare the 780 UNIBUS and the 730 UNIBUS
and say that they are the same because the handbook describes
them in the same terms, remember the above paragraph.  Further,
the 780 does break up the UNIBUS transactions (SBI interfacing, etc).
The 730 UNIBUS implemention is more similar to the PDP-11
implementations with respect to its relationship to the CPU.
	aps.