Table 280
+=====-========-========-========-========-========-========-========-========+
| Bit| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|Byte | | | | | | | | |
|=====+=======================================================================|
| 0 | Operation code (25h) |
|-----+-----------------------------------------------------------------------|
| 1 | Logical unit number | Reserved | Single |
|-----+-----------------------------------------------------------------------|
| 2 | Reserved |
|-----+-----------------------------------------------------------------------|
| 3 | Reserved |
|-----+-----------------------------------------------------------------------|
| 4 | Reserved |
|-----+-----------------------------------------------------------------------|
| 5 | Window identifier |
|-----+-----------------------------------------------------------------------|
| 6 | (MSB) |
|-----+--- ---|
| 7 | Transfer length |
|-----+--- ---|
| 8 | (LSB) |
|-----+-----------------------------------------------------------------------|
| 9 | Control |
+=============================================================================+