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Appendix A-108
Code Message
00 COMMAND COMPLETE
05 INITIATOR DETECTED ERROR
06 ABORT
07 MESSAGE REJECT
08 NO OPERATION
09 MESSAGE PARITY ERROR
0C BUS DEVICE RESET
80 to FF IDENTIFY
04 DISCONNECT
02 SAVE DATA POINTER
03 RESTORE POINTERS
*** SYNCHRONOUS DATA TRANSFER REQUEST
Note:
*** is Extended Message
(1) COMMAND COMPLETE (X’00’) : MESSAGE IN phase (target → initiator)
This message indicates that a command has been terminated and a valid status has been reported to
the initiator.
The target always reports the COMMAND COMPLETE message after the STATUS phase at the
completion of the input/output operation. (This requirement also applies if the COMMAND phase
is not executed because of a command cannot be received.)
Uopn receiving the COMMAND COMPLETE message, the initiator knows that a command has
terminated.
After sending the COMMAND COMPLETE message, the target switches into the BUS FREE phase.
If the COMMAND COMPLETE message is rejected with the MESSAGE REJECT message, this
scanner switches into the BUS FREE phase.
(2) INITIATOR DETECTED ERROR (X’05’) : MESSAGE OUT phase (initiator → target)
This message indicates that the initiator detected a retriable error and intends to request the target
for retry. The value of the current pointer is not guaranteed.
The initiator does not intend to issue another message by activating ATN before it deactivaes the
ACK of the INITIATOR DETECTED ERROR message.