Interrupts And Dma Channels Map - Motorola Mobile Workstation 520 Application Developer's Manual

20 MW-520 Application Developer's Guide

Interrupts and DMA Channels Map

The devices use the Interrupts as defined in the following tables:.
Table 8
PCI INT Line Definitions
PCI IRQ Devices
INT A PCMCIA Controller (1) + Sound Controller (1)
INT B PCMCIA Controller (2) + VGA Controller
INT C Free
INT D USB
The PCI IRQs are allocated dynamically and may differ, depending on
the operating system.
Note
Table 9
Interrupt Map
IRQ Source
IRQ 15 Processor unit ASIC
IRQ 14 IDE hard disk
IRQ 13 Floating point exception
IRQ 12 Mouse
IRQ 11 ISA PCMCIA cards
IRQ 10 PCI IRQ Resource
IRQ 9 Redirected IRQ2 + SMI
IRQ 8 RTC
IRQ 7 LPT 1
IRQ 6 Floppy drive (not used)
IRQ 5 PCI IRQ Resource
IRQ 4 COM1 (external), COM3 (radio)
IRQ 3 COM2 (GPS), COM4 (digitizer)
IRQ 2 Second internal interrupt controller
IRQ 1 Keyboard controller
IRQ 0 Timer
COM1/COM3 use IRQ4 and COM/2COM4 use IRQ3 in sharing mode.
!
Please take this feature into consideration when making a high speed
device connection.
Caution
IRQ 5 and 10 will be used for PCI devices, and will be allocated
dynamically. Usually, the sound controller and the card bus controller
will be allocated to IRQ 5.
Note