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21020285 D User’s Guide
Chapter 7 Board-control Commands
Page 7 - 48 Extended Unit Options (18H)
Unit Flags
The Unit Flags field of the Extended Unit Options Parameter Block is where
you can define command operation for the unit. With bit settings you can
address the issues of: synchronous data transfer, tagged commands, and use of
ATN signal.
Note
If you set the TAG flag
(explained on next page)
the adapter will ignore
the UNQ bit. Setting the
TAG bit implies that you
are using a SCSI-2 or
SCSI-3 device. The
UNQ bit is intended for
SCSI-1 devices.
UNQ Untagged Queuing - The SCSI-1 specification allows issue of
multiple, simultaneous, commands to a target that has multiple LUN’s, one
command per LUN. This bit allows you to select whether the RF3880 will
queue commands to a target with multiple LUN’s.
0 ⇒ Send one command at a time to this target.
1 ⇒ Queue commands to this target; it has multiple LUN’s.
SYN Synchronous Negotiation - Either the initiator or the target may
introduce negotiation for synchronous operation. How you set this bit
determines whether the RF3880 adapter will attempt to negotiate with the
device. Even if you do not set this bit to allow negotiation, if the other device
begins negotiation, the adapter will respond.
0 ⇒ Do not initiate negotiation for synchronous data transfer.
1 ⇒ Negotiate for synchronous data transfer.
IAT Inhibit ATN Signal - With this bit you can select whether the adapter
will assert the ATN signal during selection of a target. (Some older SCSI
devices do not respond to the ATN signal and may stop executing if it is
asserted.) Setting this bit will prevent the adapter from negotiating for
synchronous transfers, wide transfers, and SCSI-2 and SCSI-3 features. If you
enable any of these features with this bit set, you will get errors.
0 ⇒ ATN will be asserted.
1 ⇒ ATN will not be asserted during target selection.
WID Wide Transfers - Either the initiator or the target may introduce
negotiation for wide data transfers. How you set this bit determines whether
the RF3880 adapter will attempt to negotiate with the device. (Even if you do
not set this bit to allow negotiation, if the other device begins negotiation, the
adapter will respond.)
0 ⇒ Do not initiate negotiation for wide data transfer
1 ⇒ Negotiate for wide data transfer.
BITS
76543210
0 TAG 0 0 WID IAT SYN UNQ
Table 106: Unit Flags of Extended Unit Options
- 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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