ResumeF E D C B A 9 8 7 6 5 4 3 2 1 0 ByteOffset1 0 0 1 0 0 0 0 001 02Fields that are empty are reserved and should be set to zero.This command is used to clear an extended contingent allegiance condition. The hostadapter notifies the host that a target is in a state of extended contingent allegianceby setting bit 14 in the status word. After issuing this command, all queued opera-tions for the target specified in the Attention register will no longer be suspendedand normal operation is resumed.If the host adapter receives this command for a target that is not in a state of ex-tended contingent allegiance, this situation is not considered an error, and the com-mand is treated as a No-Op.Bit 5 in byte 2 provides the option of whether an interrupt should be issued upon com-pletion of this command. Setting this bit to one, disables the interrupt. If this bit isset to zero, an interrupt will be reported.Possible errors:Code Description08 Firmware not downloaded20 Host adapter hardware failureSCSI Bus Reset HandlingA SCSI bus reset can occur in several ways. The following describes what can causethe reset and how the host adapter will respond to the condition.Reset Initiated by the HostHard Reset. When the host adapter is reset via hardware control and the RSTPWRflag (SCSIDEF Register, bit 4) is set to one, the SCSI bus will be reset by the hostadapter as part of its power-on sequence. There will be no notification of the SCSI re-set since it is implied by the Hard Reset.Soft Reset. When the host adapter is reset via software control (Immediate Reset com-mand) and the Adapter Reset Option flag is set to zero, the SCSI bus will be reset bythe host adapter as part of its reinitialization. There will be no notification of theSCSI reset since it is implied by the Soft Reset.adaptec AHA-1740A/1742A/17446-46
