Command descriptions for communications devices GET MESSAGE(12) command SEND MESSAGE(10) command
SCSI-2

18.2.4 SEND MESSAGE(6) command

The SEND MESSAGE(6) command (see table 358) transfers data from the initiator to the target.

Table 358 - SEND MESSAGE(6) command 

===============================================================================
|  Bit|   7    |   6    |   5    |   4    |   3    |   2    |   1    |   0    |
|Byte |        |        |        |        |        |        |        |        |
|=============================================================================|
| 0   |                           Operation code (0Ah)                        |
|-----------------------------------------------------------------------------|
| 1   | Logical unit number      |                  Reserved                  |
|-----------------------------------------------------------------------------|
| 2   | (MSB)                                                                 |
|---------                                                                 ---|
| 3   |                           Transfer length                             |
|---------                                                                 ---|
| 4   |                                                                 (LSB) |
|-----------------------------------------------------------------------------|
| 5   |                           Control                                     |
===============================================================================
The transfer length specifies the length in bytes of data that shall be sent during the DATA OUT phase. A transfer length of zero indicates that no data shall be sent. This condition shall not be considered an error.