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User’s Guide 21020285 D
Chapter 6 Target Mode Pass-through Commands
Target Mode Response Command Page 6 - 15
Target Mode
Response
Command
After the adapter has received a selection from an initiator and the Host has
processed the data that it wrote into the Target Selection Data Structure, the
Host must issue a Target Mode Response command to communicate
information to be used by the RF3880 to respond to the initiator that selected it.
Note
This command must be
issued from a Command
List in order to
accommodate the
possibility of two Status
Blocks being returned.
Target Mode Response commands are queued by the adapter for execution in
the same manner in which the adapter queues commands when it is operating
as an initiator. Multiple operations in a sequence can be performed on the SCSI
bus. An example: first Target Mode Response command operations—send
data, send Save Data Pointer message, send Disconnect message, and
disconnect; second Target Mode Response command operations—reconnect,
send more data, send status, send Command Complete message, and
disconnect.
An initiator can send an unexpected message at any time. The adapter will
always accept the message, writing it into the Status Block in the Message Byte
Received field.
Command
Format
The Parameter Block format for the Target Mode Response command looks
like this:
Description of
Fields
Each of the fields used by the Target Mode Response command are explained
in the following section:
Command Identifier
The Command Identifier is used to identify the Status Block associated with a
Parameter Block. It must be a unique value.
Initiator ID
This field must contain the SCSI ID of the initiator that is to be reselected.
Address Modifier
This is the value that the adapter is to drive onto the VMEbus Address Modifier
lines when selecting the memory address for the data transfer.
Address
Offset
Byte Memory Address
Offset + 0 Offset + 1 Offset + 2 Offset + 3
00H Command Identifier
04H LUN Flags-1 Addr Mod Initiator ID
08H VME Memory Address
0CH Transfer Count
10H Reserved Rspse Cntrl Flgs Reserved
14H Queue Tag Msg Queue Tag ID Status/1st Msg Message Byte
18H Reserved
Table 49: Target Mode Response Parameter Block
- Rimfire 3880 SCSI Host 1
- Organization 5
- Conventions 7
- Documents 8
- Table of 9
- Contents 9
- Product Overview 21
- About the 22
- Rimfire 3880 22
- Management 23
- What next? 24
- Hardware Essentials 25
- Structure and 27
- Description 27
- Block Diagram 28
- Addressing 29
- Ports: General 30
- Address Buffer 32
- SET 0 0 0 0 WID WSC BSC 33
- Channel 34
- Attention Port 34
- Status Port: 38
- Reset Port 40
- Descriptions of 41
- Port Usage 41
- Hardware Installation 43
- Overview of the 45
- Installation 45
- Step 1: 46
- Unpacking the 46
- Step 2: 47
- Jumpers and 47
- Termination 47
- Configuration 48
- Bus Request/ 49
- Grant Jumper 49
- Addresses 51
- SCSI bus 52
- Step 3: Board 53
- Insertion 53
- Step 4: Apply 54
- Conditions 55
- Step 5: 56
- Configure and 56
- Connect SCSI 56
- Command Operation 59
- What the 61
- Adapter must 61
- The Base 62
- Parameter 62
- Multiple 66
- Status Blocks 66
- 000 0 0 INT ID 68
- Using a Single 69
- Some Example 70
- 2:Inquiry 73
- Pass-through 73
- Command List 76
- Creating the 78
- Using a 79
- Adding a 80
- Removing a 80
- Example ‘C’ 81
- Routines for 81
- Initiator Mode Pass 85
- Initiator Pass 87
- Block Format 87
- DBV 0 ICC 0 IRS DAT DIR 0 88
- Setting DBV 89
- DAT and DIR 89
- Table Values 89
- Table of DAT 90
- Automatic 90
- Settings 90
- 21020285 D User’s Guide 102
- Target Mode Pass 103
- Introduction 104
- Overview of 105
- Target Mode 105
- What must the 106
- Target Mode? 106
- Commands 107
- Special Target 107
- Command 108
- Descriptor 108
- Block Group 108
- Operation 109
- Sequence of 111
- Responding to 111
- Selection Data 112
- Structure 112
- 76543210 113
- CC ERR RTY 0 0 0 0 TME 113
- 0000000SAV 116
- Response 117
- 0 0 ICC TMO 0 DAT DIR 0 118
- Status Block 121
- CC ERR RTY 0 0 CSB 0 TMS 122
- Board-control Commands 125
- Using the 127
- Reference 127
- General Status 128
- List of 129
- Start Command 130
- List (01H) 130
- 1514131211109876543210 131
- 0 0 0 0 0 INT Status/ID 131
- Stop Command 132
- List (02H) 132
- Identify (05H) 133
- Identify 134
- Description of 134
- Statistics (06H) 136
- Statistics Data 138
- General 139
- Options (07H) 139
- Unit Options 142
- 0 0 0 RBE RCE RPE ISB INT 143
- 0 TAG 0 0 WID IAT SYN UNQ 144
- Diagnostic/ 148
- Self-test (09H) 148
- Enable (0AH) 151
- 000 0 0 INT Status/ID 152
- Disable (0BH) 153
- Abort (0DH) 154
- SCSI Hard 155
- Reset (10H) 155
- Information 156
- Data Structure 157
- Extended 165
- Statistics (16H) 165
- Extended Unit 169
- Options (18H) 169
- Options Data 170
- Details of Usage 175
- Byte and Word 177
- Swapping 177
- How to Use 182
- How It Works 183
- Notes on 184
- Usage and 185
- SCSI Protocol 185
- Handling 185
- Routines 188
- Disconnect 189
- Privilege 189
- Error Codes 193
- User’s Guide 21020285 D 195
- Appendix A Error Codes 195
- Summary Page A - 3 195
- Table 116: Error Codes 195
- Appendix A Error Codes 196
- Page A - 4 Summary 196
- Summary Page A - 5 197
- Status Port 198
- Self-test Error 199
- Self-test 199
- Cables and Connectors 201
- Connector 203
- Table 123: P2 Connector 205
- Specifications 207
- Appendix C Specifications 210
- Page C - 4 Specifications 210
- Defaults 211
- Hardware 213
- Appendix D Defaults 216
- Design Differences 217
- Features no 219
- Supported 219
- Implementation 220
- Differences 220
- Maximize 222
- Performance 222
- Index 224
- Page ii 224
- Index 225
- Page iii 225
- Page iv 226
- Page vi 228
- 21020285 D 230
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