Message(See ANSI SCSI-2 6.5)

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.

INTERFACE

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

Value

Message Format

 

 

00h

One Byte Message (COMMAND COMPLETE)

 

 

01h

Extended Messages

 

 

02h to 1Fh

One-Byte Messages

20h to 2Fh

Two-Byte Messages (not used)

 

 

30h to 7Fh

Reserved

 

 

80h to FFh

One-Byte Messages (IDENTIFY)

M3099GX/GH OEM Manual

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