Return Configuration Data (Operation Code 0B) - Adaptec AHA-1740A Technical Reference Manual

adaptec
After receiving this command, the host adapter returns eight bytes of information
which specify the installed configuration as shown below:
Byte
Byte 0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
If, during the execution of this command, a target reports a status of busy, the host
adapter will continue reissuing the command until either the drive reports not Busy,
or one minute of time elapses. Commands will be reissued at 0.25-second intervals.
The byte associated with the SCSI device identifier of the host adapter will always be
zero. After completing the information transfer, the HACC bit will be set to indicate
normal completion.

Return Configuration Data (Operation Code 0B)

The DMA arbitration priority, the Interrupt channel, and the SCSI ID of the adapter
are returned by this command. The three bytes of information are returned in the fol-
lowing format:
Byte Description
0 DMA Arbitration Priority
5-8
Configuration
Target 0 Configuration
Target 1 Configuration
Target 2 Configuration
Target 3 Configuration
Target 4 Configuration
Target 5 Configuration
Target 6 Configuration
Target 7 Configuration
Bit
Bit 7
Bit 6
Bit 5
Bits 4-1
Bit 0
AHA-1740A/1742A/1744
Bit
Bit 7 LU 7 Installed
Bit 6 LU 6 Installed
Bit 5 LU 5 Installed
Bit 4 LU 4 Installed
Bit 3 LU 3 Installed
Bit 2 LU 2 Installed
Bit 1 LU 1 Installed
Bit 0 LU 0 Installed
Channel 7
Channel 6
Channel 5
Reserved (0)
Channel 0