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From: grunwald@foobar.colorado.edu (Dirk Grunwald)
Newsgroups: comp.arch
Subject: Re: bus on new IBMs
Message-ID: <17449@boulder.Colorado.EDU>
Date: 26 Feb 90 22:35:39 GMT
References: <WSD.90Feb22202840@pitman.cs.brown.edu>
	<gZtMl3q00j8586TAoM@cs.cmu.edu> <1990Feb26.185737.9409@ultra.com>
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In-reply-to: casey@ultra.com's message of 26 Feb 90 18:57:37 GMT


at a local presentation, they said the protocol was:

Level 1:
			---------------------------------
	Addr		| AAA	|	| AAA   |       |
			---------------------------------
	Data		|	| DDD	|       | DDD   |
			---------------------------------
			^       ^
			+-------+
			  100ns

	Data is ready every 200ns

			
Level 2:
			---------------------------------
	Addr		| AAA	|	|	|       |
			---------------------------------
	Data		|	| DDD	| DDDD  | DDD   |
			---------------------------------
			^       ^
			+-------+
			  100ns

	Data is ready every 100ns, streaming only

Level 3:
			---------------------------------
	Addr		| AAA	| DDD	| DDD	| DDD	|
			---------------------------------
	Data		|	| DDD	| DDD	| DDD   |
			---------------------------------
			^       ^
			+-------+
			  100ns

	Two data are ready every 100ns, streaming only

their level 4 plan called for dropping the clock cycle to 50ns I
think.