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2 System Board
Devices on the PCI Bus
Devices on the PCI Bus
The distribution of the interrupt lines is described more fully on page 83.
Integrated Drive Electronics (IDE)
The IDE controller is implemented as part of the PIIX4 chip (the PCI/ISA
bridge). It is driven from the PCI bus, and has PCI-Master capability. It
supports Enhanced IDE (EIDE) and Standard IDE. To use the Enhanced
IDE features the drives must be compliant with Enhanced IDE.
The IDE controller supports two devices (one master and one slave)
connected to a single channel. The channel is fitted with an IDE cable with
two connectors.
PCI Device
Device
Name
Device
Number
Function AD[xx]
Chip-set Interrupt Connection
INTA INTB INTC INTD
PL/PCI bridge
440LX PAC 0 N/A 11 — — — —
Virtual PCI-to-PCI bridge (AGP)
440LX PAC 1 N/A 12 — — — —
PCI/ISA bridge
PIIX4 4 0 15 — — — —
IDE controller
1 — — — —
USB Host controller
2 — — — —
Power Management and SM Bus
3 — — — —
PCI slot #1 (LAN) - Minitower
16 7 0-7 18 A B C D
Backplane Rear Board - Desktop
PCI slot #2 - Minitower 17 10 0-7 21 D A B C
PCI slot #1 - Desktop
PCI slot #3 - Minitower 18 6 0-7 17 C D A B
PCI slot #2 - Desktop
PCI slot #4 - Minitower 19 12 0-7 23 B C D A
PCI slot #3 - Desktop