Reference Guide

The CIM_SystemResource class described in Table below provides access to system resources from an operating system. System
resources consist of interrupt requests (IRQs) and direct memory access (DMA) capabilities.
Table 48. CIM_SystemResource Properties
Class Name:
CIM_SystemResource
Parent Class:
CIM_LogicalElement
CIM_IRQ
The CIM_IRQ class described in Properties Table below , contains IRQ information. An IRQ is a signal that data is about to be sent to
or received by a peripheral device. The signal travels by an IRQ line to the microprocessor. Each peripheral connection must be
assigned an IRQ number. For example, the first serial port in the computer (COM1) is assigned to IRQ4 by default.
Table 49. CIM_IRQ Properties
Class Name:
CIM_IRQ
Parent Class:
CIM_SystemResource
Property Description Data Type
CSCreationClassName See Common Properties of Classes string
CSName See Common Properties of Classes string
CreationClassName See Common Properties of Classes string
IRQNumber Identifies the interrupt request number. uint32
Availability Indicates the availability of the IRQ. Values
for the Availability property are as follows:
1- Other
2- Unknown
3- Available
4 - In use/not available
5- In use and available
uint16
TriggerLevel Indicates if the interrupt is triggered by
the hardware signal going high or low.
Values for the TriggerLevel property are
as follows:
1- Other
2- Unknown
3- Active low
4- Active high
uint16
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