Path: utzoo!attcan!uunet!lll-winken!ncis.tis.llnl.gov!helios.ee.lbl.gov!pasteur!ucbvax!bloom-beacon!apple!rutgers!rochester!pt.cs.cmu.edu!andrew.cmu.edu!rs5o+ From: rs5o+@andrew.cmu.edu (Randall Knowles Smith) Newsgroups: comp.sys.mac Subject: PMMU Installation Message-ID: Date: 11 May 89 18:48:36 GMT Organization: Mathematics, Carnegie Mellon, Pittsburgh, PA Lines: 22 In a recent post, the price of a PMMU was given as $490, with the additional comment that dealer installation was required. At work, we've got about 60 Mac II's, all with PMMU chips in them. As far as I know, they are utterly useless unless you're running A/UX, in which case they are necessary. (Don't ask why we got them; we're Carnegie Mellon, we don't have to have a reason.) In any event, no miracle occurs when you plug a PMMU in; you need software to get it to do anything, and System 6.0 doesn't have any code to use it. (This isn't technical knowledge, just experience; I've used Mac II's with and without, and couldn't tell the difference.) Also, dealer installation is required simply to make sure dealer profit margins stay good. Basically, all that's needed is a chip puller (or a screwdriver and some caution) to do the installation. Takes about 10 minutes from start to finish. So if you can find a PMMU without going through Apple, don't worry about the installation Randy Smith rs5o+@andrew.cmu.edu "My university loves me and takes all my opinions to heart, so long as I continue to pay them $16,000 -- oops, tuition raise, $17,000 a year."