Interface
At command issuance (I/O registers setting contents)
| 1F7H(CM) | 1 |
| 1 |
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| 0 | 1 | 0 | 0 |
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| 1F6H(DH) | x | L | x | DV | Start head No. / LBA |
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| 1F5H(CH) | Start cylinder No. [MSB] / LBA |
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| 1F4H(CL) | Start cylinder No. [LSB] / LBA |
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| 1F3H(SN) | Start sector No. / LBA [LSB] |
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| 1F2H(SC) | Transfer sector count |
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| 1F1H(FR) | xx |
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| At command completion (I/O registers contents to be read) |
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| 1F7H(ST) |
| Status information |
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| 1F6H(DH) |
| x |
| L |
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| DV |
| End head No. / LBA [MSB] |
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| 1F5H(CH) |
| End cylinder No. [MSB] / LBA |
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| 1F4H(CL) |
| End cylinder No. [LSB] / LBA |
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| 1F3H(SN) |
| End sector No. / LBA [LSB] |
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| 1F2H(SC) |
| 00(*1) |
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| 1F1H(ER) |
| Error information |
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*1 If the command is terminated due to an error, the remaining number of sectors for which data was not transferred is set in this register.
