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From: toddpw@tybalt.caltech.edu (Todd P. Whitesel)
Newsgroups: comp.sys.apple2
Subject: Re: RAM chips: how do I tell the difference?
Message-ID: <1990Aug23.212011.6466@laguna.ccsf.caltech.edu>
Date: 23 Aug 90 21:20:11 GMT
References: <9008231909.AA12299@apple.com>
Sender: news@laguna.ccsf.caltech.edu
Organization: California Institute of Technology
Lines: 17

96975089@WSUVM1.BITNET (Ken Smith) writes:

>Here's the situation.  I'm trying to buy some 256k by 4 ram chips for my
>Ram Pak4GS.  The manual says get CAS before RAS chips.  Are there any
>markings on the chips to designate between cas bfr ras and ras bfr cas?
>looking over the chips in the board, they all seem to have a 'P' at the end
>of the part number.  Could that be it?

I doubt it. Nearly every DRAM over 256 kbit manufactured today supports CAS
before RAS. As far as I know, there are no markings because the industry
standard chip (256k x 4 in this case) must support CAS before RAS.

I would be very surprised if ANY of the 256k x 4 chips you get DON'T support
CAS before RAS.

Todd Whitesel
toddpw @ tybalt.caltech.edu