Specifications

 

Table 6-9

 

System DMA

 

 

Hardware DMA

System Function

 

 

DMA0

n/a

 

 

DMA1*

n/a

 

 

DMA2*

n/a

 

 

DMA3

n/a

 

 

DMA4

Direct memory access controller

 

 

DMA5*

Available for PC Card

 

 

DMA6

Not assigned

 

 

DMA7

Not assigned

*PC Card controller can use DMA 1, 2, or 5.

 

Table 6-10

 

System Interrupts

 

 

Hardware IRQ

System Function

 

 

IRQ0

System timer

 

 

IRQ1

Standard 101-/102-Key or Microsoft Natural Keyboard

 

 

IRQ2

Cascaded

 

 

IRQ3

Intel 82801DB/DBM USB2 Enhanced Host

 

Controller—24CD

 

 

IRQ4

COM1

 

 

IRQ5*

Conexant AC—Link Audio

 

Intel 82801DB/DBM SMBus Controller—24C3

 

Data Fax Modem with SmartCP

 

 

IRQ6

Diskette drive

 

 

Maintenance and Service Guide

6–13