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.
The following table describes the property, description, and
data type details for CIM IRQ.
Class Name:CIM_IRQ
Parent Class:CIM_SystemResource
Table 1. CIM_IRQ PropertiesThe following table describes the property, description, and
data type details for CIM IRQ.
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
TriggerType
Indicates if edge (value=4) or level triggered
(value=3) interrupts occur.
1- Other
2- Unknown
3- Level
4- Edge
uint16
Shareable
Indicates if the IRQ can be shared. A value of
TRUE indicates that the IRQ can be shared.
Boolean
Hardware
Indicates if the interrupt is hardware- or software-based.
(A value of TRUE indicates that the interrupt is hardware based.)
On a personal computer, a hardware IRQ is a physical wire to a programmable
interrupt controller (PIC) chip set through which the microprocessor
can be notified of time critical events. Some IRQ lines are reserved
for standard devices such as the keyboard, diskette drive, and the
system clock. A software interrupt is a programmatic mechanism to
allow an application to get the attention of the processor.
Boolean
Data is not available for the Topic
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