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

The binary output value resulting from the last conversion cycle is stored in the indexregister (R), or the accumulator if R=000. The data transferred to the register has theformat:0 1 15S Data OLI I I I I 1 I I I 1 I I I•••■••.,■." ••■•••■■•••••' •••••••■•••••••1 ••••••••••••••#Fourteen bits of binary data plus sign (S bit) are returned. The single-bit OL field isset on if an overload condition occurred with the automatic amplifier gain selection. Notethat the automatically selected gain is not returned with the data. This gain can bedetermined by issuing a read-ADC command before or after the read-ADC-extendedprecisioncommand.Read and Convert ADC5 8 11 16 20 26 31Op code R Fun Zeros Mod DA MA00001 XXX 0 10000000010100100 XXXXXXI ill ii 11 I 111 III 11 11 1 11111••■•■•••,..M., ••■••••,,,..1111•0 •■•■,„...1111••••0 8-F 4 0 2 9 0-3 XThis command is used for repetitive operations on a single analog input point. Theread-and-convert-ADC command stores the binary output value from the ADC into the indexregister (R), or the accumulator if R=000, and starts another conversion cycle.Data transferred to the register can have either of two formats, depending upon whetherthe last convert command requested automatic gain or selected a particular amplifier gain.If automatic gain was selected, the 16 bits of data have the format:01 13 15S Data R R R1 I 1 1 1 1 I 1 I I 1 1 I••■1111.,„/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.IBM 5012 Multifunction Module Model Al 13-13