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From: cinf07@vlsi.polymtl.ca (Miguel Pedro et Louis Sabbat)
Newsgroups: comp.sys.cbm
Subject: Re: DRAM Speed question
Message-ID: <1991Feb11.184443.4000@vlsi.polymtl.ca>
Date: 11 Feb 91 18:44:43 GMT
References: <91039.165224XWUU@PURCCVM.BITNET>
Sender: news@vlsi.polymtl.ca (USENET News System)
Organization: Ecole Polytechnique de Montreal
Lines: 20

In article <91039.165224XWUU@PURCCVM.BITNET> XWUU@PURCCVM.BITNET writes:
>My Ram Expansion Unit uses 256 X1 150ns chips.  I recently upgraded my
>REU 1764 to 512K and want to push it up to 1 or 2 Meg.  Can I use these
>120 nanosecond chips with the 150's that are already in there?


Yes.
150 ns refers to the fact that an access to memory will require a maximum of
150 ns. If you use memory chips with an access time of 120 ns, the data
will be available faster. Of course, your CPU won't run any faster.

The only requirement is to use the same DRAM type that's already in the REU.
(i.e. 256 X1)


--


   Miguel Pedro
   (if18@info.polymtl.ca was my old account)