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216 DC 900-1340I
BSC Programmer’s Guide
B.1.4 Data Reception
The BSC 2780/3780 software can receive data at any time after the link is started. The
client application program should have a
dlRead request issued at all times so the
received data can be transferred to the client. Figure B–6 is an example of how the
BSC 2780/3780 software receives a typical data message.
Figure B–6: Data Reception Sequence
Client Freeway
Remote Station
608 Bytes Normal Data
ENQ
ACK0
EOT
Block 1 (ETB)
254 bytes data
Block 2 (ETB)
254 bytes data
ACK1
ACK0
Block 3 (ETX)
100 bytes data
ACK1
dlRead
(
DLI_PROT_SEND_NORM_DATA_EOM)
- BSC Programmer’s Guide 1
- Contents 3
- List of Figures 11
- List of Tables 13
- DC 900-1340I 15 15
- 16 DC 900-1340I 16
- Purpose of Document 17
- Intended Audience 17
- Required Equipment 17
- General Product Overviews 19
- Hardware Support 19
- Other helpful documents: 21
- BSC2780/3780 22
- 24 DC 900-1340I 24
- Introduction 25
- Commercial 26
- Financial 26
- Government 26
- Military 26
- S C A D A 26
- Client Computer 27
- Standard Bus 29
- Industry 29
- 1.3 Embedded ICP Environment 30
- 1.4 Client Operations 30
- 1.5 BSC Product Overview 31
- 1.5.1 Software Description 32
- 1.5.2 Hardware Description 32
- BSC Protocol Summary 33
- 2.1.3 Transmission Codes 34
- 2.2 BSC 3270 Access Modes 35
- 2: BSC Protocol Summary 37
- DC 900-1340I 37 37
- 2.3.1 BSC 2780 Protocol 38
- 2.3.2 BSC 3780 Protocol 39
- 2.3.3 Transmission Codes 40
- DC 900-1340I 43 43
- 44 DC 900-1340I 44
- BSC 3270 DLI Functions 45
- 3.1.4 Buffer Management 49
- 3: BSC 3270 DLI Functions 53
- DC 900-1340I 53 53
- 3.3.1 DLI Optional Arguments 54
- DLI_ICP_ERR_INBUF_OVERFLOW 55
- DLI_ICP_ERR_OUTBUF_OVERFLOW 55
- 56 DC 900-1340I 56
- 3.4.1.5 Start Link Command 60
- 3.4.1.6 Stop Link Command 61
- 3.4.1.10 Send EOT Command 67
- 3.4.2.1 Request Buffer Report 71
- 3.4.2.4 Request Status Report 73
- 74 DC 900-1340I 74
- DLI_PROT_GET_POLL_LIST by 76
- 3.4.3.1 Send Normal Data 79
- 3.4.3.2 Send Transparent Data 79
- DC 900-1340I 81 81
- 82 DC 900-1340I 82
- 84 DC 900-1340I 84
- BSC 3270 Link 85
- 86 DC 900-1340I 86
- DC 900-1340I 87 87
- 4.1 Data Rate Option (1) 88
- • 1 link at 56,000 b/s 88
- • 4–8 links at 19,200 b/s 89
- 4.2 Clock Source Option (2) 89
- 4.5 Protocol Option (5) 90
- 4.6 Parity Option (6) 91
- 4.7 Character Set Option (7) 91
- 4.12 Retry Limit Option (14) 94
- • Poll and select sequences 94
- 4.14.1 RTS Signal 95
- 4.15 Safe Store Option (17) 96
- 4.16 Station ID Option (18) 97
- 4.17.2 Data Blocking 98
- 4.17.3 3270 Command Blocking 98
- DLI_ICP_ERR_BAD_BCC 99
- 4.19 Queue Limit Option (21) 100
- 4.20 Read Session Option (23) 101
- DLI_ICP_ERR_DSR_DOWN error 103
- BSC 2780/3780 105
- DLI Functions 105
- 5.1.4 Buffer Management 109
- DC 900-1340I 113 113
- 5.3.1 DLI Optional Arguments 114
- 116 DC 900-1340I 116
- Input buffer overflow 116
- Output buffer overflow 116
- DC 900-1340I 117 117
- DLI_ICP_ERR_BAD_MODE 118
- DLI_ICP_ERR_BAD_PARMS 118
- DLI_ICP_ERR_LINK_ACTIVE 120
- DLI_PROT_CFG_LINK 120
- 5.4.1.5 Start Link Command 121
- 5.4.1.6 Stop Link Command 122
- DLI_ICP_ERR_MODE_NOT_SAFE 124
- 5.4.1.8 Send EOT Command 125
- DLI_PROT_SEND_EOT. The client 127
- DLI_PROT_SEND_DISC 127
- • reject a signon bid 128
- • reject a signon response 128
- SADL Support 132
- V.25bis Support 133
- AT Support 133
- SADL Modem Configuration 135
- V.25bis Modem Configuration 135
- AT Modem Configuration 135
- Start Trace 136
- Stop Trace 136
- Link Trace Data 136
- 138 DC 900-1340I 138
- 5.4.2.1 Request Buffer Report 140
- 5.4.2.4 Request Status Report 142
- DC 900-1340I 143 143
- DC 900-1340I 145 145
- 5.4.3.1 Send Normal Data 147
- 5.4.3.2 Send Transparent Data 147
- 5.4.3.4 Priority Data 149
- 5.4.3.5 Header Data 149
- • Received data 150
- DC 900-1340I 151 151
- 152 DC 900-1340I 152
- • normal data 153
- • transparent data 153
- DLI_PROT_SEND_TRANS_DATA) 154
- BSC 2780/3780 Link 155
- Configuration Options 155
- 156 DC 900-1340I 156
- DC 900-1340I 157 157
- 158 DC 900-1340I 158
- 6.2.1 External 160
- 6.2.2 Internal 160
- 6.5 Protocol Option (5) 161
- 6.6 Parity Option (6) 161
- 6.7.1 ASCII/LRC-8 163
- 6.7.2 EBCDIC/CRC-16 163
- 6.7.3 ASCII/CRC-16 163
- 6.7.4 EBCDIC/CCITT-0 163
- 6.7.5 ASCII/CCITT-0 163
- 6.13 Retry Limit Option (14) 167
- • Initial line bid (ENQ) 167
- 6.15.1 RTS Signal 169
- 6.15.2 DSR Signal 169
- 6.16 Safe Store Option (17) 170
- Communications LineFreeway 171
- Client Freeway 171
- Communications Line 171
- DRWG-2442 172
- DRWG-2443 172
- 6.17.1 Blocking Disabled 173
- 6.17.2 Data Blocking 173
- 6.19 Queue Limit Option (21) 175
- 6.21 Read Session Option (23) 177
- 6.24 TTD/WACK Option (26) 178
- 6.25 RVI Handling Option (28) 179
- 6.29 Modem Type Option (35) 182
- 6.31 Line Type Option (41) 182
- BSC Link Configuration 183
- Using dlicfg 183
- DC 900-1340I 187 187
- 7.2 DLI Session Configuration 188
- DC 900-1340I 189 189
- 190 DC 900-1340I 190
- DC 900-1340I 191 191
- 192 DC 900-1340I 192
- Control Procedures 193
- BSC 3270 Line 193
- • device status information 194
- • EOT (nothing to send) 194
- A.1.3 Specific Poll 195
- A.3 Line Up/Down Reporting 196
- A.4 Virtual Device Procedures 197
- DLI_PROT_SEND_NORM_DATA_EOM 198
- DLI_PROT_CHANGE_STATUS 198
- DLI_ICP_ERR_DEVICE_BUSY 198
- A.4.3 3270 Command Checking 200
- DLI_ICP_ERR_DEVICE_UNAVAIL 202
- 1 – always a 1 204
- R – reserved 204
- A.5 Station Up/Down Reporting 206
- A.6 DSR/DCD Up/Down Reporting 206
- A.7 Freeway/Line Interface 207
- A.8 Modem Control Lines 207
- A.9 Clock Signals 208
- A.10 Idle Line Condition 208
- BSC 2780/3780 Control 209
- Procedures 209
- DLI_PROT_SET_BUF_SIZE) 210
- B.1.2 Normal Link Start 211
- DLI_PROT_SEND_SIGNON) 215
- DLI_PROT_SEND_NORM_DATA_EOM) 215
- B.1.4 Data Reception 216
- DLI_PROT_SEND_NORM_DATA) 217
- DLI_PROT_RESP_LOCAL_ACK) 217
- B.1.6 Priority Data Reception 218
- (DLI_PROT_SEND_NORM_DATA) 221
- DLI_ICP_ERR_RETRY_EXCEEDED 221
- DLI_ICP_ERR_XMIT_ABORTED 222
- B.1.9 Normal Link Stop 223
- B.2 DSR/DCD Up/Down Reporting 224
- B.3 Freeway/Line Interface 224
- B.4 Modem Control Lines 224
- B.5 Clock Signals 224
- B.6 Idle Line Condition 225
- 226 DC 900-1340I 226
- ASCII Translation Tables 227
- 228 DC 900-1340I 228
- C: ASCII Translation Tables 229
- DC 900-1340I 229 229
- 230 DC 900-1340I 230
- DC 900-1340I 231 231
- 232 DC 900-1340I 232
- Error Codes 233
- 234 DC 900-1340I 234
- Table D– 1: BSC Error Codes 234
- D: Error Codes 235
- DC 900-1340I 235 235
- 236 DC 900-1340I 236
- BSC Loopback Test 237
- 242 DC 900-1340I 242
- BSC Detailed Command and 243
- Response Formats 243
- F.1.2 Set Buffer Size 244
- F.1.3 Link Configuration 244
- F.1.4 Link Enabling (Bind) 244
- F.1.5 Data Transfer 244
- F.1.6 Link Disabling (Unbind) 245
- F.1.7 Session Detach 245
- DLI_ICP_CMD_ATTACH command 248
- F.3 Response Header Format 257
- 258 DC 900-1340I 258
- DC 900-1340I 259 259
- 260 DC 900-1340I 260
- DC 900-1340I 261 261
- 262 DC 900-1340I 262
- DC 900-1340I 263 263
- 264 DC 900-1340I 264
- DC 900-1340I 265 265
- 266 DC 900-1340I 266
- DC 900-1340I 267 267
- 268 DC 900-1340I 268
- Customer Report Form 269
- Protogate, Inc 270
- Customer Service 270
- San Diego, CA 92128 270
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