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From: michaelk@copper.UUCP (Michael Kersenbrock)
Newsgroups: net.micro.68k,net.micro.amiga,net.micro.atari16,net.micro.mac
Subject: Re: The Motorola 68030
Message-ID: <624@copper.UUCP>
Date: Sun, 28-Sep-86 13:52:33 EDT
Article-I.D.: copper.624
Posted: Sun Sep 28 13:52:33 1986
Date-Received: Tue, 30-Sep-86 13:34:49 EDT
References: <2270@gitpyr.UUCP> <1837@well.UUCP>
Reply-To: michaelk@copper.UUCP (Michael Kersenbrock)
Distribution: net
Organization: Tektronix, Inc., Beaverton, OR.
Lines: 50
Keywords: new motorola chips mmu fastIn article <1837@well.UUCP> swalton@well.UUCP (Stephen R. Walton) writes:
Xref: watmath net.micro.68k:1881 net.micro.amiga:5004 net.micro.atari16:2233 net.micro.mac:8021

>In article <2270@gitpyr.UUCP> rodney@gitpyr.UUCP (RODNEY RICKS) writes:
>>In the September 18, 1986 issue of Electronic Design magazine, there is an
>>article on page 27 describing the new microprocessor from Motorola, the 68030.
>>The chip is said to run software 20% to 30% faster than the 68020.  The chip
>>is supposed to be available in mid-1987, along with an improved math
>>coprocessor, the 68882, which will be up to 25% faster than the 68881.
>>
>
>I hope the '82 is more like twice as fast as the 68881.
>
>>The bus data transfer rate of the 68030 is 40 Mbytes/sec.
>
>Think about this.  That's a memory access time of 25 nanoseconds, more than
>4 times as fast as the memory we use in our PC's, Macs, Amigas, and Apples.
>

Um....your 8-bit uP background is showing.  If the 68030 is handling data
at 40 MBytes/sec, that's 100 nS per bus cycle time.  The '030, like the
'020 is 32-bit machine -- it does 4-bytes at a time.


>>Now, when will I be able to connect one to my Amiga?
>
>Probably soon.  But it won't be noticably faster than a CSA 68020.
>An editorial on the subject of the 68040 (yes, 40) in a recent issue of
>a small PC magazine commented that these chips are so fast that a fair
>amount of high-speed cache memory is absolutely essential to take full
>advantage of them.  And that means minicomputer pricing, not micros.
>Unless one of you hot-shot chip designers out there can put together a
>1 MB DRAM with 25 ns access which will sell for less than $100 apiece :->

Well, 1M Drams are normally 100nS, so even with the "normal" chips, it
may get by with only a few wait-states.  In any case, one of the reasons
that the '030 is supposed to be faster is that it has a built-in data-cache
in addition to the program-cache that the '020 has.

>
>			Stephen Walton, speaking for myself
>
>Dudley Moore: You must be a nut case!
>Peter Cook:  They said that about Galileo!  They said that about Einstein!
>Moore:  Yeah, well they've said it about a lot of nut cases, too.
>					-from the movie "Bedazzled"


-- 

Mike Kersenbrock
Tektronix Computer Aided Software Engineering
Aloha, Oregon