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

CIA ^iN1i Ma IIl AMINNNP u 11.!..111PM oou^r nMWrite Digital Output Holding Register0 5 8 11 16 20 26 31Op code R Fun Zeros Mod DA MA0 0 0 0 1 X XX 0 0 1 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 XXXXXX1111 i i II 1111 III 11111 11111O8-F 2 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 Register0 5 8 11 16 20 26 31Op code R Fun Zeros Mod DA MA0 0 0 0 1 * • • 0 0 1 0 0 0 0 0 0 0 1 0 1 1 XX 0 0 XXXXXX1111 ii 11 1111 111 / 1111 11111•••■••••■■• •••••••,-■-' ••••••••/""."O 8 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 Register0 5 8 11 16 20 26 31Op code R Fun Zeros Mod DA MA0 0 0 0 1 XXX 0 1 0 0 0 0 0 0 0 0 0 01 1 XX 0 0 XXXXXX1111 II II 1111 111 11111 11111O8-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 Register0 5 8 11 16 20 26 31Op code R Fun Zeros Mod DA MA0 0 0 0 1 X XX 0 1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 X XXXXX1111 ii II 1111 ill 11111 11111O',de/my/NM,8-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.