Acer travelmate 505 Service Manual
26
Chapter 1
IRQ Assignment Map
Interrupt Channel
Function
NMI
System errors
IRQ0
System timer
IRQ1
Keyboard
IRQ2
Cascade
IRQ3
COM2
IRQ4
COM1
IRQ5
VGA
IRQ6
Floppy
IRQ7
LPT1
IRQ8
Real time clock
IRQ9
PCMCIA (Optional)
IRQ10
USB
IRQ11
Audio/Modem/CardBus
IRQ12
PS2 pointing device
IRQ13
Numeric data processor
IRQ14
1st IDE device (hard disk)
2nd EIDE device (CD-ROM drive)
IRQ15
Optional
DMA Channel Assignment
DMA Channel
Function
DRQ0
Audio (optional)
DRQ1
ECP or Audio (optional)
DRQ2
Floppy
DRQ3
ECP (optional)
DRQ4
DMA controller
DRQ5
Not used
DRQ6
Not used
DRQ7
Not used
505-1.book Page 26 Thursday, November 4, 1999 4:36 PM