17.04.2015 Views

Tema 7. Interfaces con los Periféricos de Almacenamiento

Tema 7. Interfaces con los Periféricos de Almacenamiento

Tema 7. Interfaces con los Periféricos de Almacenamiento

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Técnicas <strong>de</strong> programación para<br />

implementar la comunicación a<br />

través <strong>de</strong> la interfaz ATA-IDE<br />

• E/S programada (PIO)<br />

– Instrucciones: REP INS, REP OUTS, se repiten<br />

hasta que el <strong>con</strong>tador alcanza el valor 0<br />

– Mo<strong>de</strong> 0: 3 MB/s; Mo<strong>de</strong> 1: 5 MB/s; Mo<strong>de</strong> 2: 8<br />

MB/s; Mo<strong>de</strong> 3: 11 MB/s; Mo<strong>de</strong> 4: 16 MB/s;<br />

•DMA<br />

– 13.3 - 66 MB/s<br />

<strong>Tema</strong> 7/20

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