Re: bus on new IBMs

Article View: comp.arch

Article #22663

#22663

From: Dirk Grunwald
Date: Wed, 28 Feb 1990 03:13

27 lines
1607 bytes

>>>>> On 27 Feb 90 00:51:28 GMT, yap@me.utoronto.ca (Davin Yap) said:
DY> grunwald@foobar.colorado.edu (Dirk Grunwald) writes:
>Level 3:
>			---------------------------------
>	Addr		| AAA	| DDD	| DDD	| DDD	|
>			---------------------------------
>	Data		|	| DDD	| DDD	| DDD   |
>			---------------------------------
>			^       ^
>			+-------+
>			  100ns

>	Two data are ready every 100ns, streaming only

DY> The sales rep at the announcement told me that this was their 80 MByte/s
DY> mode.  True of False?
DY> --

could be - but, the 50ns implies 20M-DDD/second. I assume a DDD is 2
bytes? If not, and it's 4 bytes (i.e. 32bit wires), you'd get 80Mb/s,
not the 40 I was thinking of.

Then, by dropping to 50ns strobes, you'd get 160Mb/s. I think that
sounds right. They mumbled something about their optical interface,
which was supposedly 200Mb/s, but I don't think it goes through the
micro-channel, although it's controlled by the same controller.

Technical Details

Message-ID: <17506@boulder.Colorado.EDU>

Path:

arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!samsung!zaphod.mps.ohio-state.edu!sunybcs!boulder!grunwald

References: <WSD.90Feb22202840@pitman.cs.brown.edu> <17449@boulder.Colorado.EDU> <1990Feb26.195128.16857@me.toronto.edu>

Show Full Headers

Complete Article Headers

Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!samsung!zaphod.mps.ohio-state.edu!sunybcs!boulder!grunwald
From: grunwald@foobar.colorado.edu (Dirk Grunwald)
Newsgroups: comp.arch
Subject: Re: bus on new IBMs
Message-ID: <17506@boulder.Colorado.EDU>
Date: 28 Feb 90 03:13:16 GMT
References: <WSD.90Feb22202840@pitman.cs.brown.edu>
 <17449@boulder.Colorado.EDU> <1990Feb26.195128.16857@me.toronto.edu>
Sender: news@boulder.Colorado.EDU
Reply-To: grunwald@foobar.colorado.edu
Organization: University of Colorado at Boulder
Lines: 27
In-reply-to: yap@me.utoronto.ca's message of 27 Feb 90 00:51:28 GMT

Reply to Parent Message