On Mar 12, 2005, at 4:03 PM, Laurent Daudelin wrote:
on 12/03/05 18:19, Zoltan Batiz at [EMAIL PROTECTED] wrote:
OK,
I know this thread isn't completely on topic of G-Books, but hey, I
did
start thinking of it while using my Pismo system so here we go:
I was thinking the other day of the limits USB has, in the department
of just how many devices can be connected to one USB port. According
to the facts, the limit is 127 devices. Who, may I ask, actually came
up with that number?! Did someone in their garage actually connect
128
devices only to discover that the 128th device didn't work, therefore
coming up with the 127 number? Let's say that you used the Belkin 7
port hub to do this. In theory, you'd need 18 hubs, giving you 126
ports; still short by one port. That also means you'd need 18 plugs,
assuming ALL 126 devices are bus powered. Are these numbers really
just a marketing gimmick? Anyway, this is really just me thinking out
loud and nobody has to respond, but I'm still wondering about the
reality and practicality of these numbers.
Food for Thought. . .
It's not an arbitrary number. It has to do with computer programming
maths.
For the same reason that memory comes in multiple of 64. 128, 256, 512,
etc., and not 25, 50, 75. The root is the binary system that is the
basic
unit by which a computer can compute...
-Laurent.
--
Oh ok, so what you are saying is that nobody actually tried connecting
127 devices to their system. Someone just came up with the number due
to a mathematical formula?
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