Table 122
+=====-========-========-========-========-========-========-========-========+
| Bit| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|Byte | | | | | | | | |
|=====+=======================================================================|
| 0 | Operation code (08h) |
|-----+-----------------------------------------------------------------------|
| 1 | Logical unit number | (MSB) |
|-----+------------------------------ ---|
| 2 | Logical block address |
|-----+--- ---|
| 3 | (LSB) |
|-----+-----------------------------------------------------------------------|
| 4 | Transfer length |
|-----+-----------------------------------------------------------------------|
| 5 | Control |
+=============================================================================+