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3-100
One-byte messages consist of a single byte transferred during a
MESSAGE phase. The value of the byte determines which message is
to be performed as defined in Table 3.83 (See ANSI SCSI-2 6.6
Table 10). The implemented Message Codes by this scanner is Table
3.83.
Table 3.83 Message Codes
Code
Support Message Name
Init
Targ
00h
M
M
COMMAND COMPLETE
02h
O
O
SAVE DATA POINTER
03h
O
O
RESTORE POINTERS
04h
O
O
DISCONNECT
05h
M
M
INITIATOR DETECTED
ERROR
06h
O
M
ABORT
07h
M
M
MESSAGE REJECT
08h
M
M
NO OPERATION
09h
M
M
MESSAGE PARITY ERROR
0Ch
O
M
BUS DEVICE RESET
80h+
M
O
IDENTIFY
80h+
M
M
IDENTIFY
***
O
O
SYNCHRONOUS DATA
TRANSFER REQUEST
others
Reserved
Key:
M: Mandatory support, O = Optional support
In: Target to initiator, out = Initiator to target.
Yes: Initiator shall negate ATN before last ACK of message.
No: Initiator may or may not negate ATN before last ACK of
message. (see Attention Condition)
—: Not Applicable
***: Extended message (see Tables 3.84 and 3.85)
80h: Codes 80h through FFh are used for IDENTIFY messages.
(See Table 3.86).
Direction
Nefate ATN
Before last
ACK
In
—
In
—
In
—
In
—
Out
Yes
Out
Yes
In
Out
Yes
Out
Yes
Out
Yes
Out
Yes
In
—
Out
No
In
Out
Yes
M3099GX/GH OEM Manual
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