2.2 The IBM 7171 ASCII Device Attachment Control Unit - Index of

2.7.1 Preparing the VM/SP SystemAn example of the necessary host entries for two IBM 7171 's attached to the samehost channel is shown in Figure 2-4. The first IBM 7171 has 64 ASCII devicesattached and therefore requires entries to appear as two 3274 entries (two sharedUnit Control Words). The second IBM 7171 has 32 ASCII devices attached andneeds only one 3274 entry.*************************************************** IBM 7171 SYSTEM 1 WITH 64 ASCII DEVICESRDEVICE ADDRESS=(cOO,31) ,DEVTYPE=3278,MODEL=2RDEVICE ADDRESS=(c1F,01) ,DEVTYPE=3286RDEVICE ADDRESS=(c20,31) ,DEVTYPE=3278,MODEL=2RDEVICE ADDRESS=(c3F,01) ,DEVTYPE=3286**************************************************** IBM 7171 SYSTEM 2 WITH 32 ASCII DEVICESRDEVICE ADDRESS=(c40,32) ,DEVTYPE=3278,MODEL=2**************************************************** IBM 7171 SYSTEM 1 CONTROL UNITRCTLUNIT ADDRESS=cOO,CUTYPE=3274,FEATURE=32-DEVICERCTLUNIT ADDRESS=c20,CUTYPE=3274,FEATURE=32-DEVICE* IBM 7171 SYSTEM 2 CONTROL UNITRCTLUNIT ADDRESS=c40,CUTYPE=3274,FEATURE=32-DEVICE**************************************************** IBM 7171 SYSTEM 1 AND 2 CHANNELRCHANNEL ADDRESS=c,CHTYPE=BLKMPXR***************************************************Figure 2-4. VM/SP System Generation Informationwhere 'c' defines the channel address on the IBM 7171 host channel. For adetailed description of setting up channel addresses and Unit Control Word(UCW) definitions, refer to the IBM 7171 ASCII Device Attachment Control UnitDescription and Planning Guide.Chapter 2. System Description and Operation 2-13