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

Read Digital Input RegisterO 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 0 0 XXX 0 0 XXXXXXI III ii II LIII III II 111 11111•-••■••■,■• --•■■■■■-•O 8-F 4 0 0 0-7 0-3 XThis command stores the 16 bits of input data from a group (identified by the deviceaddress field) into the index register (R), or the accumulator if R=000.Read/Reset Digital Input RegisterO 5 8 11 16 20 26 31Op code R Fun Zeros Mod DA MA0 0 0 0 1 XX X 0 1 0 0 0 0 0 0 0 0 0 1 OXXX 00XXXXXX!III ii II 1111 III 11111 111 IIO8-F 4 0 1 0-7 0-3 XThis command stores the 16 bits of input data from a group (identified by the deviceaddress field) into the index register (R), or the accumulator if R=000.If a group is non-isolated and operating in latched mode, its digital input register is resetto 0 only if its input has returned to a 0 value. If the input is at a 1 level, the registerposition remains set to 1.If the group is isolated, operating in latched mode, and the input is not active, its digitalinput register is then reset to 0.If a process interrupt group is operating in latched mode, its digital input register isthen reset to a 0 value (even if the input is still active).Set Digital Input Reference Register0 5 8 11 16 20 26 31Op code R Fun Zeros Mod DA MA0 0 0 0 1 XXX 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 X 0 0 XXXXXX1 11 ii II ti l l III 11111 I 1 111O8-F 2 0 2 0 or 1 0-3 XThis command stores a 16-bit value 7 the reference register associated with group 0 orgroup 1. The choice is determined by the device address field in the command: 000000for group 0 or 000100 for group 1.The value set into the reference register is obtained from the index register (R), or theaccumulator if R=000.The reference registers are part of the Process Interrupt feature for groups 0 and 1, andare used for comparison with the 16-point group input register. Interruption requests canbe presented for either an equal or an unequal comparison; the choice is under controlof the program. (Refer to "Set Digital Input Interrupt Control" later in this chapter.)