Path: utzoo!attcan!uunet!cs.utexas.edu!uwm.edu!rpi!uupsi!rodan.acs.syr.edu!amichiel From: amichiel@rodan.acs.syr.edu (Allen J Michielsen) Newsgroups: comp.sys.mac.hardware Subject: Re: Memory upgrade for Mac Plus Keywords: references wanted Message-ID: <1990Oct14.171754.5378@rodan.acs.syr.edu> Date: 14 Oct 90 18:27:44 GMT References: Sender: amichiel@sunrise.acs.syr.edu Organization: Syracuse University, Syracuse, NY Lines: 29 In article masticol@lento.rutger >Does anyone have a reference (in one of the Mac magazines or books, >perhaps) on how to upgrade the memory of a Plus? I need to know both >the procedure and what type of SIMMs to buy. I don't have a ref., but it's pretty easy. Let's assume you have your red devil putty knife out, and can open the case. Let's further assume you know basically how the sims pop in and out. Then we'll assume you are willing to risk (and careful enough not to) cracking your motherboard doing this without experience. It also is possible to break a sims socket, but .... You should find 2 rows of 2 sims. You'll almost certainly find 4 sims that are 256K sims. (adding up to 1 MB). Now you'll need 1 MB sims in even quantities (either 2 or 4). 2 will give you 2 MB, then you can use 2 of the leftover 256K's to get 2.5 Mb total. If you replace all 4 with 1 MB sims, you'll have 4 MB. If you choose NOT to use 4 1 MB sims, you must put the highest density sims in the lowest numbered sockets. This is identified as the sockets clostest to the main cpu in almost all applications. If there's a doubt, you can try pulling 2 sims, the turn the machine on, if it tries to or basically boots, then you have found the HI number sockets, if you get a beep & or a memory error icon/ sad mac, you've found the low sockets. Hope this helps. al -- Al. Michielsen, Mechanical & Aerospace Engineering, Syracuse University InterNet: amichiel@rodan.acs.syr.edu amichiel@sunrise.acs.syr.edu Bitnet: AMICHIEL@SUNRISE