Path: utzoo!utgpu!watmath!clyde!att!rutgers!gatech!hubcap!mmccann From: mmccann@hubcap.UUCP (Mike McCann) Newsgroups: comp.sys.mac Subject: Re: 4 X 256K DRAM For Sale Summary: SIMMs needed to upgrade an SE Message-ID: <3727@hubcap.UUCP> Date: 3 Dec 88 18:40:46 GMT References: <7918@pasteur.Berkeley.EDU> <18464@shemp.CS.UCLA.EDU> <684@hscfvax.harvard.edu> Distribution: na Organization: Clemson University, Clemson, SC Lines: 26 In article <684@hscfvax.harvard.edu>, xmjschm@hscfvax.harvard.edu (MJSchmelzer) writes: > In article <18464@shemp.CS.UCLA.EDU> seth@cognet.ucla.edu (Seth R. Goldman) writes: > >In article <7918@pasteur.Berkeley.EDU> c162-fs@zooey.Berkeley.EDU (Bruce Burkhalter) writes: > >> - 4 X 256K DRAM > >> - 120 ns > >> - DIP > > Is this neccessary and sufficient to upgrade my SE to 2 megs? > The Macintosh Plus and SE both only have space for a total of 4 SIMMs (the Macintosh II has space for 8 SIMMs). So to upgrade your 1Mb system which uses 4 256K SIMMs to 2Mb, you have to remove two of the 256K SIMMS and replace them with two 1Mb SIMMs (giving you a total of 2.5Mb). As for the 120ns chip speed, that speed is fine in an SE (if I am not mistaken, the Plus and SE only need 150ns but the increased speed of the MacII requires the 120ns chips). I hope this helps, -- Mike McCann Internet = mmccann@hubcap.clemson.edu Poole Computer Center (Box P-11) UUCP = gatech!hubcap!mmccann Clemson University Bitnet = mmccann@clemson.bitnet Clemson, S.C. 29634