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

Interrupt Status Word (ISW): The 16 bits in the interrupt status'word are set by conditionsoccurring after a convert-analog-input or a convert-analog-input-with-external-synchronizationcommand is completed but while the device is still busy. Since these errors cannot beindicated to the program by the condition code, interruptions result from setting on anyISW bit except the busy bit. Setting on bits 3 or 7 also sets on the summary statusindicator when the resulting interruption request occurs. After the interruption isaccepted, executing any command other than read DSW resets the ISW.The significant bits in the ISW and their meanings are:Significant Bits Meaning3 Analog-to-digital converter inoperative.7 Overload. The voltage read by the ADC was greater than the inputvoltage range selected by the amplifier.8 Auto range selected in error.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 wasnot installed.Read DSW0 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 1 1 1 ******XXXXXXi Ili ii II 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 10 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.Device Status Word (DSW): The 16 bits in the device status word are set as a result ofdetected error conditions occurring during the execution of an immediate command tothe I/O module. The operating program is notified of these error conditions by returningDSW bits, condition code 1 continues to be returned to the program.The significant bits in the DSW and their meanings are:Significant Bits Meaning1 Command reject. The analog input module cannot execute thecommand. (For example, an interruption-causing command issued tothe device when it is disabled for interruptions.)14 Data check. The analog input module has detected a parity errorinvolving data. The operation that caused this condition usually canbe retried successfully if the error condition is intermittent.IBM 5014 Analog Input Module Models D1 and El 12-5