Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!samsung!brutus.cs.uiuc.edu!apple!stevec
From: stevec@Apple.COM (Steve Christensen)
Newsgroups: comp.sys.mac
Subject: Re: Re: New RISC Graphics for Macs (and other Quest's)
Message-ID: <7380@goofy.Apple.COM>
Date: 23 Mar 90 23:12:12 GMT
References: <22297@watdragon.waterloo.edu> <5360046@hpccc.HP.COM>
Organization: Apple Computer Inc., Cupertino, CA
Lines: 26

In article <5360046@hpccc.HP.COM> dlw@hpccc.HP.COM (David Williams) writes:
>>>After looking at the product blurb with a photo of the motherboard, I can
>>>assure you the SIMMs in the IIfx are 64 pinners.
>>>
>>>I think it has to do with the fact that the previous SIMMs don't have enough
>>>pins to go above 4 Megs, and they want the IIfx to handle 16 meg SIMMs when
>>>they come out.
>>>
>>All 30-pin simms have 12 address bits, which allow 16Meg chips. The 64 pinners
>>allow separate data-in & out lines, for dummp&run writes
>
>I'm STILL confused...does this mean I can use 80ns simms like the ones
>I now have in my IIx[from Peripheral Outlet] in a IIfx or are the
>simms custom jobbies available ONLY from APPLE? Are "normal" 80ns
>simms 64 pinners? I mean how would one specify the correct simms when
>ordering from a simm supplier?

Let me set the record straight.  The 64-pin RAM SIMMs used in the IIfx are
NOT compatible with SIMMs of any kind that work with any other kind of Mac.
If you get a board upgrade from a IIx (for example) you can do whatever you
want with the RAM that was in the IIx except put them into the IIfx.  OK?

As far as availability (and don't quote me on this), the IIfx SIMMs will be
available from Apple and, I believe, from other sources.

steve