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From: jeff@gatech.CSNET (Jeff Lee)
Newsgroups: net.micro.atari16,net.micro.amiga,net.micro.68k
Subject: Re: 68000 Memory Managment
Message-ID: <4455@gatech.CSNET>
Date: Tue, 2-Sep-86 10:35:39 EDT
Article-I.D.: gatech.4455
Posted: Tue Sep  2 10:35:39 1986
Date-Received: Tue, 2-Sep-86 21:30:58 EDT
References: <508@elmgate.UUCP> <64@mit-prep.ARPA> <510@elmgate.UUCP> <4422@gatech.CSNET> <1045@hoptoad.uucp>
Reply-To: jeff@gatech.UUCP (Jeff Lee)
Followup-To: net.micro.68k
Organization: School of Information and Computer Science, Georgia Tech, Atlanta
Lines: 52
Keywords: 68000 atari amiga 68k mmu
Xref: mnetor net.micro.atari16:1788 net.micro.amiga:4509 net.micro.68k:1185

In article <1045@hoptoad.uucp> gnu@hoptoad.uucp (John Gilmore) writes:
>>
>>                 ...does anyone know of a REAL (ie - available off the
>> shelf, now) system that actually uses the nibble mode of some of the
>> newer rams...
>
>I do not remember if the new cached Sun uses nibble mode (or other
>fast column mode) RAMs.
>
>Part of the problem is that designers don't want to require nibble mode
>RAMs, since they usually cost more than "any old RAMs".  Designing to
>the least common denominator in RAMs [modulo what speed you need]
>is very useful for reducing prices.

Speaking of the new SUN, I just saw it come through "The Monthly Report" in
the August UNIX Review. For folks who may not have seen it, here are (what
I consider to be) the highlights.

	"Designed to address those traditional scientific/engineering
	tasks that tend to be computebound (such as electrical and
	mechanical CAD, geophysical analysis and AI), the SUN-3/200
	series features the 25 MHz 68020, a 20 MHz 68881 floating point
	co-processor, and a proprietary MMU."

	... talk of 4 MIPS integer performance ...

	"Also available is SUN's optional Floating Point Accelerator (FPA)
	which is said to perform 32 and 64-bit floating point calculations
	at rates as high as 865 KFLOPS, according to the workstation
	vendor."

	"To maximize throughput, the machine has a 64 KB virtual-address,
	write-back memory cache and 64-bit processor-memory bus. The 3/200
	also comes with up to 32 MB of memory, and -- with teh use of four
	of SUN's new 575 MB disks -- up to 2.3 GB of mass storage capapcity."

	"SUN is showing the new machines at trade shows this month (AAAI
	and SIGGRAPH), and is promising shipment within 90 days. The price
	on the SUN-3/260HM (high-resolution monochrome) base system,
	including 12-slot card cage and 8 MB memory, is pegged at $33,900;
	with a 280 MB disk drive and 1/4-inch tape, the cost goes up to
	$51,500. The base configuration for the 3/260C (color) station is
	$44,900; with disk and tape, $62,500."

Since this may not thrill atari and amiga folks, I restricted followups
to this message to net.micro.68k.

	Enjoy...
-- 
Jeff Lee
CSNet:	Jeff @ GATech		ARPA:	Jeff%GATech.CSNet @ CSNet-Relay.ARPA
uucp:	...!{akgua,allegra,hplabs,ihnp4,linus,seismo,ulysses}!gatech!jeff