IBM System/7 Functional Characteristics - All about the IBM 1130 ...

Write Digital Output Holding RegisterO 5 8 11 16 20 26 31Op code R Fun Zeros Mod DA MA00001 X XX 0 0100000000111000 0 XXXXXXI t!! ii 11 IIII III 11111 11111‘••••■••••,■••••■■ ■■•••••■,,■■ ••••■•■•••\,■1111N,O 8-F 7 0 1 C 0-3 XThis command stores 16 bits of output data from the index register (R), or the accumulatorif R=000, into the holding register.The holding register is a buffer that allows the data to be verified by the program priorto transferring it to one of four output registers (and to the corresponding terminals).Set Digital Output Group RegisterO 5 8 11 16 20 26 31Op code R Fun Zeros Mod DA MA00001 *** 00100000 001011 XX 00 XXXXXX!ill II II 1111 III 11111 11 111O8 2 0 2 C-F 0-3 XThis command transfers the 16 bits of output data in the holding register to the digitaloutput group register identified by the device address field. The R field is ignored.Read Digital Output Group RegisterO 5 8 11 16 20 26 31Op code R Fun Zeros Mod DA MA00001 XXX 0 1000000000011 XX 00 XXXXXXIill hi 11 1111 III 1 1111 11111••■•••■,.■■••••■•••■,,,MMO0 8-F 4 0 0 C-F 0-3 XThis command stores the 16 bits of output data from a group register (identified by thedevice address field) into the index register (R), or the accumulator if R=000.Read Digital Output Holding RegisterO 5 8 11 16 20 26 31Op code R Fun Zeros Mod DA MA00001 X XX 0 10000000001110000 X XXXXXI ll, II II 1111 111 11 I 11 111 I 1O8-F 4 0 1 C 0-3 XThis command stores the 16 bits of output data from the holding register into the indexregister (R), or the accumulator if R=000.2790 CONTROLThe 2790 Control feature of the digital I/O module attaches a single loop of the IBM2790 Data Communication System to the System/7 as shown in Figure 14-1. This featureprovides the user with a flexible plant communication and data collection system.IBM 5013 Digital I/O Module Model Al 14-11