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

Convert Analog Input0 5 8 11 16 20 26 31Op code R Fun Zeros Mod DA MA0 0 0 0 1 X X X 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 1 00XX XXXXi ill i i II 1111 1 1 1 1 1 1 I 1 1 I I I 1.•■••■■,e.II.■ ■••••■,■•••••'',..oms.,/■■•■,,e•M•••'•■III.\.,ng.•••■•••••I.N.,M••e,n••••\,.■ar° '••■■sse■IM•,0 8-F 2 0 0 9 0-3 XThis command starts an analog-to-digital conversion cycle based upon control informationcontained in the index register (R), or the accumulator if R=000. The control informationword has the format:Mpxr addrXX RRROXXXXXXX1111 II 11111115High-order bits of multiplexeraddress field are in bits 2-3 ofthe control word.0-2 1-7 0-7 XThe range bits (RRR) in the control word specify the input voltage range and the amplifiergain desired, as shown in the following table.RRR Bits Input Voltage Range Amplifier Gain000 Invalid001 ±10 mV 512010 ±20 mV 256011 ±40 mV 128100 ±80 mV 64101 ±160 mV 32110 ±640 mV 8111 ±5.12V 1The range bits (RRR) have no significance if the high-level amplifier is installed.This convert-analog-input command starts an analog-to-digital conversion cycle of theanalog input point specified by the multiplexer address field in the control word. Aninterruption request occurs at the end of the conversion cycle. The results of the conversionare then obtained by issuing a read-ADC or read-ADC-extended-precision command. Thedata format is in standard form (14 bits plus sign).The multiplexer address field in the control word consists of bits 2-3 (the fieldhigh-order bits) and 9-15. The nine bits can be considered as a binary field to encodeaddresses 000 to 383. Bit 8 is reserved and set to zero. Bits 2-3 are necessary because ananalog input configuration (models D1/E1/E1) can have up to 384 points.IBM 5014 Analog Input Module Models Dl and El 12-3