3-12 Software Functional Overview
PCI Device
The tables below summarize PCI device pin allocations.
IDSEL Pin Allocation
IDSEL Pin
PCI Device
Device Number
Function
Number
Device Name
AD11
Device 00
Function 0
MTXC / 440BX – Host to PCI
bridge
AD13
Device 02
Function 0
NMG4 Video Accelerator
AD15
Device 04
Function 0
ESS Maestro-2 Audio
Accelerator
AD17
Device 06
Function 0
MODEM
Function 0
PIIX4 – PCI to ISA bridge
Function 1
PIIX4 – IDE interface
Function 2
PIIX4 – USB interface
AD18
Device 07
Function 3
PIIX4 – PMU and SMBus
interface
Function 0
PCI1221 – CardBus Socket A
AD21
Device 0A
Function 1
PCI1221 – CardBus Socket B
INT Pin Allocation
INT pin
PCI Device
INTA
CardBus
INTB
Modem
INTC
VGA/Audio
INTD
USB
PCI Bus Master Allocation
REQ# pin
PCI Device
REQ 0
CardBus
REQ 1
VGA
REQ 2
Audio
REQ 3
Modem