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Computers, Computer Science The primary disadvantage of programmed I/O is that the CPU spends most of its time in a tight loop waiting for the device to become ready. This approach is called busy waiting.
Ríomhairí, Ríomheolaíocht Is é an príomh-mhíbhuntáiste a bhaineann le I/A ríomhchláraithe ná go gcaitheann an LAP an chuid is mó den am i lúb theann ag fanacht go dtí go mbeidh an gléas ullamh. Glaoitear feitheamh gnóthach ar an staid seo.