7 6 5 4 3 2 1 00 0 0 1 SCSI IDThe SCSI ID specifies either the SCSI address of a particular target, or the SCSI ad-dress of the host adapter. The host adapter’s ID can be found in bits 3-0 of the SCSIDefinition register.When the Attention register is written to, the host adapter is interrupted. When thecommand is completed, the host adapter (if enabled) will interrupt the host by writ-ing to the Enhanced Mode (Group 2) Interrupt Status register. If the immediate com-mand completed with an error, the first byte of the Mailbox In registers will containthe appropriate error code.Supported Immediate Commands• Reset (80h)• Resume (90h)The control block commands are described below in alphabetical order.ResetF E D C B A 9 8 7 6 5 4 3 2 1 0 ByteOffset1 0 0 0 0 0 0 0 00A D 02Fields that are empty are reserved and should be set to zero.This command allows the host, via software control, to reset a particular target orthe host adapter.This command will always interrupt the host upon completion. The host should waituntil the interrupt is posted in order to determine if the reset was completed success-fully.Reset DeviceIf the Attention register contains the ID of a SCSI target, then this command is in-tended to reset the associated device to a known state with minimum impact to otherdevices on the bus.On receiving this command, the host adapter will clear its internal memory of all out-standing control blocks for the associated target. It will also clear any queued inter-rupts for the associated target. A queued interrupt occurs when a control blockEISA-to-Fast SCSI Host Adapter Enhanced Mode Firmware Description6-43
