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Posting-Version: version B 2.10.2 9/18/84; site watmath.UUCP
Path: utzoo!watmath!csc
From: csc@watmath.UUCP (Jan Gray)
Newsgroups: net.micro
Subject: Re: Will the real Amiga stand up!
Message-ID: <16178@watmath.UUCP>
Date: Wed, 14-Aug-85 21:43:11 EDT
Article-I.D.: watmath.16178
Posted: Wed Aug 14 21:43:11 1985
Date-Received: Sat, 17-Aug-85 15:35:28 EDT
References: <1087@wucs.UUCP>
Reply-To: jan@looking.UUCP (Jan Gray)
Organization: U of Waterloo, Ontario
Lines: 22
Summary: 

In article <1087@wucs.UUCP> dale@wucs.UUCP (Dale Frye) writes:
>In Byte they show a picture of the Amiga motherboard with two 27256 ROM's and
>room for two more. The picture also shows only 8 41256s. Is the memory bus
>only 8 bits wide?  However in a new magazine called AmigaWorld there is a
>picture of the motherboard with 16 41256s. I couldn't see any ROM but then the
>disk drive was in the way. A friend who attended a local dealer roundup by
>Commadore told me that there isn't any system ROM. Instead the system is loaded
>on power-up into RAM and then is write-protected. 

Look closer.  Those DRAMs have *18* pins.  They are almost certainly 64K x 4,
not 256K x 1, so the Amiga has a 32 bit bus (which is absolutely necessary
to get the high bandwidth to video if you work it out).

I will also speculate that the picture in AmigaWorld is of the new Amiga with
"writable control store" (Oh God!) which uses the extra 256K for the OS.

>MOST IMPORTANT QUESTION!!!!
>3: Is the memory data path 8 or 16 bits wide!!!!!!!!

32 bits.  I think.

Jan Gray  watmath!looking!jan  Looking Glass Software, Waterloo  519-884-7473