gauging interest in VAX 6000-530

From: Carlos Murillo <cem14_at_cornell.edu>
Date: Tue Oct 26 08:32:54 1999

At 10:08 PM 10/25/99 -0700, you wrote:
>>Two 1MHz busses will be faster than a single 2MHz bus if they are being used
>>for different purposes, such as one for I/O and one for memory accesses.
>
>But my point is that one 4 MHz synchronous bus is going to be faster than
>two 1 MHz busses in all cases.

No, no and no. A dumb 4Mhz burst bus that requires cpu attention to work
will be many times slower in actual applications than two 1Mhz buses with
distributed arbitration and such smarts. That's all the point of the
discussion. That's why raw numbers tend to be meaningless. That's why
system designers nowadays make decisions based on simulations and not
on raw specs.

Carlos.
Received on Tue Oct 26 1999 - 08:32:54 BST

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