User`s manual

siop_struc (Command Structure)

SBCSCSI/D1 B-15

Status

initiator mode

The status field contains status concerning the target device, Firmware, and

SCSI bus. The least significant byte in this field contains the status received

from the target during the status phase of the SCSI command. The second least

significant byte in this field contains an error code generated by the Firmware

if a Firmware detected error occurred. This field is initially cleared by the

Firmware when the command structure is first allocated to the Firmware.

config mode

The least significant byte in this field is not used for a config mode request.

The second least significant byte in this field contains an error code generated

by the Firmware if a Firmware detected error occurred. This field is initially

cleared by the Firmware when the command structure is first allocated to the

Firmware.

Termination Transfer Byte Count

initiator mode

The termination transfer count field contains the number of bytes successfully

transferred during a data phase on the SCSI bus. The user should compare this

value with the expected count to verify that the correct number of bytes were

transferred. This field is initially cleared by the Firmware when the command

structure is first allocated to the Firmware.

Error Address

initiator mode

This is the address where an SIOP bus fault or illegal SIOP instruction error

was encountered.

SCSI Queue Tag

initiator mode

This field is used by the Firmware to track queued commands to peripherals

that support SCSI tagged command queuing. Upon command completion this

field contains the queue tag used by the Firmware.