Date: Tue, 29 Jun 1993 00:37:49 -0600
From: Drew Eckhardt <drew@nagina.cs.Colorado.EDU>
If we clock a 16 bit bus at 10Mhz, 0 wait states, we have 20M/sec
split between 5M/sec or 10M/sec SCSI and 1M/sec ethernet,
more than enough.
No, you DON'T have 20MB/sec, because there's a lot more to a bus
transaction than data transfer. If you can burst, you may get close to that
for brief periods, but doing word-at-time DMA you lose cycles to bus
arbitration/address cycles/other goo.
Sitting down with timing diagrams and working through bandwidth
calculations is a useful, if dull, exercise. It certainly gave me respect
for George's design of the pc532.
-- Jerry Callen
jcallen@world.std.com (preferred)
jcallen@think.com (OK, too)
{uunet,harvard}!think!jcallen (if you must)
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