Message In

Table 113. Supported Inbound Messages

Name

Code

Support

 

 

 

Command Complete

00h

This message is sent by the drive at the end of the Status

 

 

phase to indicate that a command is complete. Once the

 

 

message is sent, the drive releases the bus and goes to

 

 

Bus Free.

 

 

 

Disconnect

04h

This message is sent by the drive to indicate that it is

 

 

about to disconnect from the bus and go to Bus Free.

 

 

During a Data phase, it is always preceded by a Save

 

 

Data Pointers message. If a Message Reject message is

 

 

received in response to this message, then the disconnect

 

 

is prevented.

 

 

 

Extended Message

01h

See “Extended Messages” on page 100 for extended

 

 

message support.

 

 

 

Identify

80h+

The Identify In message is sent to the initiator during

 

 

reconnect to indicate which Logical Unit is reconnecting.

 

 

The Disconnect Privilege and LUNTAR flags are both

 

 

clear.

 

 

 

Ignore Wide Residue

23

This message is sent by the drive to the initiator to

 

 

indicate that a byte on a wide bus is not valid. This is

 

 

supported whenever a wide transfer is active.

 

 

 

Message Reject

07h

This message is sent to the initiator when the message

 

 

received by the drive is unsupported or inappropriate.

 

 

 

Restore Pointers

03h

This message causes the initiator to reset its data transfer

 

 

pointers to the values they held when the last Save Data

 

 

Pointers message was sent. It is sent when a parity error

 

 

is detected on the bus or when an Initiator Detected Error

 

 

message is received in order to retry the Data phase.

 

 

 

Save Data Pointers

02h

This message instructs the initiator to save its current data

 

 

transfer pointers for use with a subsequent Restore

 

 

pointers message. This message is always sent before a

 

 

Disconnect message during Data phases.

 

 

 

Chapter 5. Attachment Features 99

Page 113
Image 113
IBM T200F manual Supported Inbound Messages

T200F, T200 specifications

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