4.3 Interface Register
4.3.1.7 ATAPI Block Device Select register
This register's bits are defined as shown below.
Table 4.8 Bit definitions of ATAPI Block Device Select register
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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Unused | Unused | Unused | Dev | Unused |
| Unused |
| R/W |
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Bits 7, 6, 5, 3, 2, 1, and 0 are not used. The ODD ignores all value sets in these bits.
Dev indicates the device address. When Dev is 0, device 0 is selected and when Dev is 1, device 1 is selected.
4.3.1.8 Error register
This register indicates the status of the final command.
The value of this register is effective when the ERR bit of the Status register is 1 at completion of a command other than EXECUTE DEVICE DIAGNOSTIC.
The value of this register indicates the diagnostic code at
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| Table 4.9 Bit definitions of Error register |
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7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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| Sense Key |
| MCR | ABRT | EOM | ILI | Read | |
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For the Sense Key, see Table 4.102.
MCR (Media Change Requested) is not used. It is always 0.
ABRT (Aborted Command) indicates that the value of the ATA command code or task file register is incorrect.
EOM (End of Media) is not used. It is always 0.
ILI (Illegal Length Indication) is not used. It is always 0.