Table 257

+=====-========-========-========-========-========-========-========-========+
|  Bit|   7    |   6    |   5    |   4    |   3    |   2    |   1    |   0    |
|Byte |        |        |        |        |        |        |        |        |
|=====+=======================================================================|
|     |                        Sub-channel data header                        |
|=====+=======================================================================|
| 0   |                               Reserved                                |
|-----+-----------------------------------------------------------------------|
| 1   |                             Audio status                              |
|-----+-----------------------------------------------------------------------|
| 2   | (MSB)                                                                 |
|-----+---                     Sub-channel data length                     ---|
| 3   |                                                                 (LSB) |
|=====+=======================================================================|
|     |                  CD-ROM current position data block                   |
|=====+=======================================================================|
| 4   |                  Sub channel data format code (01h)                   |
|-----+-----------------------------------------------------------------------|
| 5   |                ADR                |             Control               |
|-----+-----------------------------------------------------------------------|
| 6   |                             Track number                              |
|-----+-----------------------------------------------------------------------|
| 7   |                             Index number                              |
|-----+-----------------------------------------------------------------------|
| 8   | (MSB)                                                                 |
|- - -+---                     Absolute CD-ROM address                     ---|
| 11  |                                                                 (LSB) |
|-----+-----------------------------------------------------------------------|
| 12  | (MSB)                                                                 |
|- - -+---                  Track relative CD-ROM address                  ---|
| 15  |                                                                 (LSB) |
+=============================================================================+