Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84 SMI; site sun.uucp Path: utzoo!linus!decvax!decwrl!sun!guy From: guy@sun.uucp (Guy Harris) Newsgroups: net.micro.68k Subject: Re: Re: Re: Re: Info on OS9 Operating System Message-ID: <2878@sun.uucp> Date: Sat, 12-Oct-85 16:35:45 EDT Article-I.D.: sun.2878 Posted: Sat Oct 12 16:35:45 1985 Date-Received: Tue, 15-Oct-85 06:38:21 EDT References: <347@wlbr.UUCP> <9500001@datacube.UUCP> <126@mcrware.UUCP> <275@graffiti.UUCP> <138@mcrware.UUCP> Organization: Sun Microsystems, Inc. Lines: 9 > > Why is an MMU that expensive? > Not only in dollars. In bus cycles. Re: MC68451. *Some* MMUs are expensive in bus cycles. The one on this machine does not slow down access to memory. It may not be inexpensive in cost, but it's certainly cheap in bus cycles. Guy Harris