Compaq 1200US Presario Select 1200 Series Maintenance and Service Guide - Page 82

System Interrupts, System DMA, Hardware IRQ, System Function

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

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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