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#1
July 24th, 2006, 06:49 AM
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Asynchronized I/O == multiplexing I/O?
Hello everyone,
I always see the two words -- asynchronized I/O and I/O multiplexing. Are they the same thing -- like select/poll? I noticed that in some situations, people say they are different and asynchronized I/O is better than I/O multiplexing. Could anyone help to clarify the differences between the two words? thanks in advance, George
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#2
July 24th, 2006, 07:39 AM
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Asynchronized I/O, means the I has nothing to do with the O, so to speak. You can input all you want, and the output doesn't notice it.
Multiplexed I/O means the two are interleaved on the same line. So at one moment in time, a port is input, the next moment, it's output. Obviously, this is less desirable, since it may happen that input has to wait before output is finished, or vice versa.
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