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46 PCM-4894 User Manual

PM Events

PM events are I/O events whose occurrence can prevent the

system from entering a power saving mode or can awaken the

system from such a mode. In effect, the system remains alert for

anything which occurs to a device which is configured as En-

abled, even when the system is in a power down mode.

When an I/O device wants to gain the attention of the operating

system, it signals this by causing an IRQ (Interrupt Request) to

occur. When the operating system is ready to respond to the

request, it interrupts itself and performs the service. The follow-

ing is a list of IRQs, which can be disabled:

• COM Ports Activity

• LPT Ports Activity

• HDD Ports Activity

• VGA Activity

• IRQ3 (COM 2)

• IRQ4 (COM 1)

• IRQ5 (LPT 2)

• IRQ6 (Floppy Disk)

• IRQ7 (LPT 1)

• IRQ8 (RTC Alarm)

• IRQ9 (IRQ2 Redir)

• IRQ10 (Reserved)

• IRQ11 (Reserved)

• IRQ12 (PS/2 Mouse)

• IRQ13 (Coprocessor)

• IRQ14 (Hard Disk)

• IRQ15 (Reserved)

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Aaeon PCM-4330 Guía de instalación Pagina 52