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<b>please I'm having a problem understanding how data is transferred from disk to memory is conducted under programmed I/O. Can anyone help explain to me with examples the steps involved in this type of data transfer. Thanks.</b>
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You need to by a book on hardware architecture. Alternatively try a Google search.
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Here is what is expected of enquirers:
1. TRY first what you want to do! You may find that it's not that hard.
2. Formulate what was done by you that looks like an issue/not working.
For now, start understanding the details from this ppt: I/O Programming[^]
More material: here[^]
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