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Programmed I/O (e.g. NE2000, 3c509)

 
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thedark
Second Lieutenant


Joined: 30 Jul 2005
Posts: 1074

PostPosted: Thu Aug 04, 2005 5:31 pm    Post subject: Programmed I/O (e.g. NE2000, 3c509) Reply with quote
Pro: Doesn't use any constrained system resources, just a few I/O registers, and has no 16M limit.

Con: Usually the slowest transfer rate, the CPU is waiting the whole time, and interleaved packet access is usually difficult to impossible.
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