Fujitsu M3096GX Instruction Manual page 150

(10) SAVE DATA POINTER (X©02π) : MESSAGE IN phase (target Æ initiator)
This message is sent from the target to the initiator in order to save the current
data pointer. The initiator saves the current data pointer value into the saved
pointer for the logical unit currently connected.
When the disconnection is enabled by the IDENTIFY message and this scanner
cannot prepare data to be transferred in the DATA IN phase, this scanner issues the
DISCONNECT message after issuing the SAVE DATA POINTER message so that
the SCSI bus is released.
Notes:
1. When no memory option is provided, this scanner does not issue the SAVE
DATA POINTER message.
2. When the required data for the READ command is less than 64 KB, this
scanner does not issue the SAVE DATA POINTER message.
(11) RESTORE POINTERS (X©03π) : MESSAGE IN phase (target Æ initiator)
The initiator restores the saved pointer by using this message.
restores the command data status pointer value from the saved pointer for the
logical unit connected when this message is received. The initiator stores the value
into the current pointer.
Note:
This scanner issues the RESTORE POINTER message only during error
recovery when the INITIATOR DETECTED ERROR message has been
received.
(12) SYNCHRONOUS DATA TRANSFER REQUEST (Extended message) Message
IN/OUT Phase (Init R Targ)
The SYNCHRONOUS DATA TRANSFER REQUEST consists of 5bytes is only an
extended message by this scanner.
SYNCHRONOUS DATA TRANSFER REQUEST
Bit 7
Byte
0 Extended message (01h)
1 Extended message length (03h)
2 SYNCHRONOUS DATA TRANSFER REQUEST code (01h)
3 Transfer Period Factor
4 REQ/ACK Offset
4 $ 118
6 5 4 3 2 1
The initiator
0