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Maintenance and Service Guide 6–13
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