Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!asuvax!ncar!boulder!pikes!bscott
From: bscott@pikes.Colorado.EDU (Ben Scott)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: Memory speed on the A3000
Summary: All this and memory too?
Keywords: 3000 RAM memory chips speed increments
Message-ID: <3686@pikes.Colorado.EDU>
Date: 8 May 90 10:33:35 GMT
References: <68@burken.bula.se> <11427@cbmvax.commodore.com>
Reply-To: bscott@pikes.Colorado.EDU (Ben Scott)
Distribution: comp
Organization: University of Colorado, Denver
Lines: 25

In article <11427@cbmvax.commodore.com> valentin@cbmvax (Valentin Pepelea) writes:
>There's no such thing as ram chips 'clocked at 16MHz' or 'clocked at 25 MHz'.
>The useage of appropriately fast ram chips allows the CPU to fetch data
>without undue "wait states". A wait state is a wasted cycle during which the
>CPU must wait until the ram chips are ready to return the data needed.

Could you post specs on exactly how many wait-states either 3000 is running
now (as shipped, standard config)?  All I've heard here is "fewer than a NeXT"
which is great, but nonspecific... I've heard from a local inside person that
it runs a "sustained, effective ZER wait states" (his spelling, not mine!) which
sounds great.

Also, exactly which increment configurations do the motherboard sockets support?
I'm guessing 1 meg increments for the 1megx4 chips and 4 meg increments
for the 4megx4?  Also, can you combine the two types?  How is the config set
(jumpers?) or is additional RAM automatically recognized somehow?

.                           <<<<Infinite K>>>>
 
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