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

Convert Analog Input with External Synchronization0 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 0 1 1 0 0 1 0 0 XXXXXXI I I II II 1 11 III II 1 1 1 1 1 1 10 8-F 2 0 1 9 0-3 XThis command functions in the same manner as the convert-analog-input command exceptthat the start of conversion depends upon the receipt of an external synchronization inputpulse.The user provides the external synchronization input pulse to start the analog-to-digitaldata conversion. (Refer to the System17 Installation Manual—Physical Planning, OrderNo. GA34-0004, for more detailed data on the external synchronization input pulse.)Read ADC0 5 8 11 16 20 26 31Op code R Fun Zeros Mod DA MA0 0 0 0 1 XXXO 1' 0 000 0 0 0 0 0 0 1 0 0 1 0 0 XXXXXX1 I I 1 ■ II 1 11 III 1 111 I I 11110 8-F 4 0 0 9 0-3 XThis command stores the binary output value from the ADC into the index register (R),or the accumulator if R=000.Data stored in the register can have either of two formats, depending upon whether thelast convert command requested automatic gain or selected a particular amplifier gain.If automatic gain was requested, the 16 bits of data have the format:0 1 13 15S Data R RRI I I I 1.1 II II I I••■•••■,,•■‘Twelve bits of binary data plus sign (S bit) are returned. The RRR field indicates whichamplifier gain was automatically selected by the amplifier. (Refer to the table in the"Convert Analog Input" command description.) If RRR =000, an overload conditionoccurred with the automatic gain selection.10-4 GA34-0003