System Interrupts, Hardware IRQ System Function

Nonoperating

1.5 G

NOTE: Applicable product safety standards specify thermal limits for plastic surfaces. Compaq Presario 1200 Series Portable Computers operate well within this range of temperatures.

System Interrupts

	System Interrupts
Hardware IRQ	System Function
IRQ0	Timer Interrupt
IRQ1	Standard 101/102-Key or Microsoft Natural
	Keyboard
IRQ2	Programmable interrupt controller
IRQ3	Compaq Presario 56K-DF
IRQ4	Communications Port (COM1)
IRQ5	ES1869 Plug and Play AudioDrive
IRQ6	Standard Floppy Disk Controller
IRQ7	Printer Port (LPT1)
IRQ8	System CMOS/real time clock
IRQ9	(free)
IRQ10	OPTi 82C861 PCI to USB Open Host Controller
IRQ10	IRQ Holder for PCI Steering
IRQ11	IRQ Holder for PCI Steering
IRQ11	IRQ Holder for PCI Steering
IRQ11	NeoMagic MagicGraph 128XD
IRQ11	Texas Instruments PCI-1131 CardBus Controller
IRQ11	Texas Instruments PCI-1131 CardBus Controller
IRQ12	Synaptics PS/2 TouchPad
IRQ13	Numeric data processor
IRQ14	Primary IDE controller (dual fifo)
IRQ14	Opti Viper Max Dual PCI IDE Controller
IRQ15	Secondary IDE controller (dual fifo)
IRQ15	Opti Viper Max Dual PCI IDE Controller

System DMA

1242, 1234 specifications

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