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M3099GX/GH OEM Manual 3-99
INTERFACE
The message system allows communication between an initiator and
target for the purpose of interface management. A message may be
one, two, or multiple bytes in length. One or more messages may be
sent during a single MESSAGE phase, but a message may not be
split over MESSAGE phase. The initiator is required to end the
MESSAGE OUT phase (by negating ATN) when it sends certain
messages identified in Table 3.82.
One byte, Two byte, and extended message formats are defined. The
first byte of the message determines the format as defined in Table
3.82.
Table 3.82 Message Format
Message(See
ANSI SCSI-2 6.5)
Value
00h
01h
02h to 1Fh
20h to 2Fh
30h to 7Fh
80h to FFh
Message Format
One Byte Message (COMMAND COMPLETE)
Extended Messages
One-Byte Messages
Two-Byte Messages (not used)
Reserved
One-Byte Messages (IDENTIFY)
#03.pm5 98.2.22, 1:33 PM99