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

Read /SW0 5 8 11 16 20 26 31Op code R Fun Zeros Mod. DA MA00001 X X X 010000000011100100 XXXXXX1111 II 11 Ili! III 11111 11111•••■••■,,,•••••••■■■••■.,•■•.,■61.,,••■I••■■••,,.■••.,0 8-F 4 0 3 9 0-3 XThis command stores the 16-bit interrupt status word (ISW) associated with the analoginput module into the index register (R), or the accumulator if R=000.Interrupt Status Word (ISW) • The 16 bits in the interrupt status word are set by conditionsoccurring after a convert-analog-input, convert-analog-input-with-external-synchronization,or read-and-convert-analog-input command is completed, but while the device is still busy.Since these errors cannot be indicated to the program by the condition code, interruptionsresult from setting on any ISW bit except the busy bit. Setting on any one of bits 3through 7 also sets on the summary status indicator when the resulting interruption requestoccurs. After the interruption is accepted, executing any command other than read DSWresets the ISW.The significant bits in the ISW and their meanings are:Significant Bits Meaning3 Analog-to-digital converter inoperative.5 Invalid analog data. The polarity of the input voltage changed duringthe conversion cycle.7 Overload. The voltage read by the ADC was greater than the inputvoltage range selected by the amplifier.12 Device busy. The analog input module is converting an input voltage.13 Device end. The conversion operation requested is complete. If errorconditions occur during the execution of I/O commands, this bit isset on along with other error identifying bits.15 Invalid multiplexer address. An input point was addressed that is notinstalled.Read DSW0 5 8 11 16 20 26 31Op code000011111RXXXIIFunZeros010000000111111111Mod111DA11111MAX XXXXX11111•••■•••,....../ ....ww.„,.■■••••■■•••,,,■•••0 8-F 4 0 7 0 0-3 XThis command stores the 16-bit device status word (DSW) associated with the analog inputmodule into the index register (R), or the accumulator if R=000. Execution of thiscommand resets the bits in the DSW.IBM 5014 Analog Input Module Model CI 11-7