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User’s Guide 21020285 D
Chapter 6 Target Mode Pass-through Commands
Target Mode Response Command Page 6 - 17
Response Control Flags
Since the adapter, acting as a Target, controls the phases of the SCSI bus, this
field is important to use as a means of informing the RF3880 of what actions
it should take on the SCSI bus, during which phase. The format is as follows:
CSC Connected SCSI Command - The following conditions will cause
the adapter to hold connection to the SCSI bus: disconnects are not allowed by
either initiator or Host, ATN was asserted by the initiator, or certain error
conditions occurred. To continue processing the nexus for which the bus is held,
the Host must send a Target Mode Response command that has this bit set. This
Target Mode Response command’s Initiator ID, LUN, and Queue Tag ID fields
must exactly match the nexus for which the bus is held. If the SCSI bus is
disconnected, this bit is ignored.
0 ⇒ If the SCSI bus is being held, defer execution of this command.
1 ⇒ Execute this command to continue the current SCSI operation.
DSD Disconnect - This bit is used to tell the adapter to disconnect from the
SCSI bus after a new command is received as a result of either the CMD bit or
LSC bit being set.
0 ⇒ This option will not be used.
1 ⇒ The adapter must disconnect after receiving a new command.
BFR Bus Free Phase - Use this bit to cause an immediate Bus Free phase.
The adapter will send no message bytes before going to Bus Free phase. This
bit can be used to cause an unexpected disconnect.
0 ⇒ This option will not be used.
1 ⇒ The adapter will immediately go to Bus Free phase.
CMD Command Phase - Use this bit to cause the adapter to go to Command
phase and receive a new command from the initiator. Use the SMB with this
bit if a specified Message byte should be sent before going to Command phase.
This bit is only used to recover from unexpected events.
0 ⇒ This option will not be used.
1 ⇒ The adapter will go to Command phase to receive a new command from
the initiator.
NSC Normal SCSI command termination - Use this bit to cause the
adapter to terminate a normal command. The adapter will send the Status Byte
followed by the Message Byte and then go to Bus Free phase.
0 ⇒ This option will not be used.
1 ⇒ The adapter will terminate the command by going to Bus Free phase after
sending the Status Byte followed by the Message Byte.
BITS
76543210
SMB LSC DSC NSC CMD BFR DSD CSC
Table 51: Meaning of Response Control Flags Field
- 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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