5K320 SATA OEM Specification
14.15Read DMA Ext (25h)
Command Block Output Registers
Register |
| 7 | 6 |
| 5 |
| 4 | 3 | 2 |
| 1 |
| 0 |
|
Data Low |
| - | - |
| - |
| - | - | - |
| - |
| - |
|
Data High |
| - | - |
| - |
| - | - | - |
| - |
| - |
|
Feature | Current | - | - |
| - |
| - | - | - |
| - |
| - |
|
| Previous | - | - |
| - |
| - | - | - |
| - |
| - |
|
Sector Count | Current | V | V |
| V |
| V | V | V |
| V |
| V |
|
| Previous | V | V |
| V |
| V | V | V |
| V |
| V |
|
LBA Low | Current | V | V |
| V |
| V | V | V |
| V |
| V |
|
| Previous | V | V |
| V |
| V | V | V |
| V |
| V |
|
LBA Mid | Current | V | V |
| V |
| V | V | V |
| V |
| V |
|
| Previous | V | V |
| V |
| V | V | V |
| V |
| V |
|
LBA High | Current | V | V | V | V | V | V | V | V |
| ||||
| Previous | V | V |
| V |
| V | V | V |
| V |
| V |
|
Device |
| - | 1 |
| - |
| - | - | - |
| - |
| - |
|
Command |
| 0 | 0 |
| 1 |
| 0 | 0 | 1 |
| 0 |
| 1 |
|
Command Block Input Registers
Register |
| 7 | 6 |
| 5 |
| 4 | 3 | 2 |
| 1 |
| 0 |
Data Low |
| - | - |
| - |
| - | - | - |
| - |
| - |
Data High |
| - | - |
| - |
| - | - | - |
| - |
| - |
Error |
|
|
|
| ...See Below... |
|
|
| |||||
|
|
|
|
|
|
|
|
|
|
|
| ||
Sector Count | HOB=0 | - | - |
| - |
| - | - | - |
| - |
| - |
| HOB=1 | - | - |
| - |
| - | - | - |
| - |
| - |
LBA Low | HOB=0 | V | V |
| V |
| V | V | V |
| V |
| V |
| HOB=1 | V | V |
| V |
| V | V | V |
| V |
| V |
LBA Mid | HOB=0 | V | V |
| V |
| V | V | V |
| V |
| V |
| HOB=1 | V | V |
| V |
| V | V | V |
| V |
| V |
LBA High | HOB=0 | V | V | V | V | V | V | V | V | ||||
| HOB=1 | V | V |
| V |
| V | V | V |
| V |
| V |
Device |
| - | - |
| - |
| - | - | - |
| - |
| - |
Status |
|
|
|
| ...See Below... |
|
|
| |||||
|
|
| Error Register |
|
|
|
|
|
| Status Register |
|
|
| ||||
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| 7 | 6 | 5 | 4 | 3 |
| 2 | 1 | 0 |
CRC | UNC | 0 | IDN | 0 | ABT | T0N | AMN |
| BSY | RDY | DF | DSC | DRQ |
| COR | IDX | ERR |
V | V | 0 | V | 0 | V | 0 | 0 |
| 0 | V | 0 | V | - |
| 0 | 0 | V |
|
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Table 70 Read DMA Ext Command (25h)
The Read DMA Ext command reads one or more sectors of data from disk media, then transfers the data from the device to the host.
The sectors are transferred through the Data Register 16 bits at a time.
The host initializes a
If an uncorrectable error occurs, the read will be terminated at the failing sector.
Output Parameters To The Device
Sector Count Current | The number of sectors to be transferred low order, bits (7:0). |
Sector Count Previous | The number of sectors to be transferred high order, bits (15:8). If 0000h in the Sector |
| Count register is specified, then 65,536 sectors will be transferred. |
LBA Low Current | LBA (7:0) |
LBA Low Previous | LBA (31:24) |
LBA Mid Current | LBA (15:8) |
LBA Mid Previous | LBA (39:32) |
LBA High Current | LBA (23:16) |
LBA High Previous | LBA (47:40) |
Input Parameters From The Device | |
LBA Low (HOB=0) | LBA (7:0) of the address of the first unrecoverable error. |
LBA Low (HOB=1) | LBA (31:24)of the address of the first unrecoverable error. |
LBA Mid (HOB=0) | LBA (15:8)of the address of the first unrecoverable error. |
LBA Mid (HOB=1) | LBA (39:32)of the address of the first unrecoverable error. |
LBA High (HOB=0) | LBA (23:16)of the address of the first unrecoverable error. |
LBA High (HOB=1) | LBA (47:40)of the address of the first unrecoverable error. |
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