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- Newsgroups: comp.sys.mac.hardware
- Path: sparky!uunet!walter!porthos!prefect!ccw
- From: ccw@prefect.uucp (26554-wood)
- Subject: Re: Memory Question
- Organization: Bellcore, Livingston, NJ
- Date: Tue, 1 Sep 92 16:06:04 GMT
- Message-ID: <1992Sep1.160604.8003@porthos.cc.bellcore.com>
- Keywords: Memory
- References: <1992Aug27.152034@IASTATE.EDU>
- Sender: netnews@porthos.cc.bellcore.com (USENET System Software)
- Lines: 31
-
- In article <1992Aug27.152034@IASTATE.EDU> chili@IASTATE.EDU (Matthew S Carney) writes:
- >Dear Net BrainTrust,
-
- [Upgrading SIMMS...]
-
- >They were
- >not the usual SIMMS that I was expecting, but rather, they
- >only had 2 memory chips on each SIMM instead of the usual 8.
- >My question is, what is up this this type of SIMM. I have never
- >heard of nor seen them before. Any info would be welcomed.
-
- Simple... These are 256K SIMMs that are built out of one-megabit dram
- chips, that are configured to "store" 256K addresses x 4 bits in each
- chip. Electrically, they're identical to any other 256K SIMM with the
- same speed... Technology marches on. I believe I've seen 1 Meg SIMMs
- that only have two chips on them, so they were built out of 4 megabit
- drams, set up as 1 Meg x 4 bits... (Comparing the 256K x 4 with the 1
- Meg x 1, the x4 chips are a little more complicated than the x1 chips,
- so they get introduced a little later, after manufacturers get the
- x1 chips into production...
-
- > Thanks in advance,
- > Matt.
-
- you're welcome.
-
- Chris
-
- Chris Wood Bellcore ...!bellcore!prefect!ccw
- or ccw@prefect.cc.bellcore.com
-
-