Craig Hart's PCI+AGP bus sniffer, version 0.45á, freeware made in 1996-2001.

PCI BIOS Version 2.10 found!
Number of PCI Busses : 3
PCI Characteristics  : Config Mechanism 1 Special Cycle Mechanism 1 

Searching for PCI Devices using the System BIOS

 Vendor 8086h Intel Corporation
 Device 1130h 82815/EP/P Solano Host-Hub Interface Bridge (GMCH/MCH A2-step)
 Command 0106h (Memory Access, BusMaster, System Errors)
 Status 2090h (Has Capabilities List, Supports Back-To-Back Trans., Received Master Abort, Fast Timing)
 Revision 02h, Header Type 00h, Bus Latency 00h
 Self test 00h (Self test not supported)
 PCI Class Bridge, type PCI to HOST
 New Capabilities List Information :
  Vendor-Dependant Capability

 Vendor 8086h Intel Corporation
 Device 1132h 82815 Solano Graphics Device (GMCH A2-step)
 Command 0007h (I/O Access, Memory Access, BusMaster)
 Status 02B0h (Has Capabilities List, Supports 66MHz, Supports Back-To-Back Trans., Medium Timing)
 Revision 02h, Header Type 00h, Bus Latency 00h
 Self test 00h (Self test not supported)
 PCI Class Display, type VGA
 Subsystem ID 00340E11h Unknown
 Subsystem Vendor 0E11h Compaq Computer Corp
 Address 0 is a Memory Address (anywhere in 0-4Gb, Prefetchable) : 44000000h
 Address 1 is a Memory Address (anywhere in 0-4Gb) : 40500000h
 System IRQ 11, INT# A
 New Capabilities List Information :
  Power Management Capabilities
    Current Power State : D0 (Device fully-operational, no power saving)

 Vendor 8086h Intel Corporation
 Device 2418h 82801AA 8xx Chipset Hub to PCI Bridge
 Command 0107h (I/O Access, Memory Access, BusMaster, System Errors)
 Status 0080h (Supports Back-To-Back Trans., Fast Timing)
 Revision 02h, Header Type 01h, Bus Latency 00h
 Self test 00h (Self test not supported)
 PCI Class Bridge, type PCI to PCI
 Primary bus number 0, Secondary bus number 2, Subordinate bus number 2
 Secondary bus latency 40h, Secondary bus status 2280h
 Secondary bus controls : ISA mapping
 I/O Port range accessable beyond bridge : 1000h to 1FFFh

 Vendor 8086h Intel Corporation
 Device 2410h 82801AA 8xx Chipset LPC Interface Bridge
 Command 010Fh (I/O Access, Memory Access, BusMaster, Special Cycles, System Errors)
 Status 0280h (Supports Back-To-Back Trans., Medium Timing)
 Revision 02h, Header Type 80h, Bus Latency 00h
 Self test 00h (Self test not supported)
 PCI Class Bridge, type PCI to ISA

 Vendor 8086h Intel Corporation
 Device 2411h 82801AA 8xx Chipset IDE Controller
 Command 0005h (I/O Access, BusMaster)
 Status 0280h (Supports Back-To-Back Trans., Medium Timing)
 Revision 02h, Header Type 00h, Bus Latency 00h
 Self test 00h (Self test not supported)
 PCI Class Storage, type IDE
 PCI EIDE Controller Features :
  BusMaster EIDE is supported
  Primary   Channel is at I/O Port 01F0h and IRQ 14
  Secondary Channel is at I/O Port 0170h and IRQ 15
 Subsystem ID 24118086h 82801AA 8xx Chipset IDE Controller (Generic ID)
 Subsystem Vendor 8086h Intel Corporation
 Address 4 is an I/O Port : 00002460h

 Vendor 8086h Intel Corporation
 Device 2412h 82801AA 8xx Chipset USB Controllers
 Command 0005h (I/O Access, BusMaster)
 Status 0280h (Supports Back-To-Back Trans., Medium Timing)
 Revision 02h, Header Type 00h, Bus Latency 00h
 Self test 00h (Self test not supported)
 PCI Class Serial, type USB (UHCI)
 Subsystem ID 24128086h 82801AA 8xx Chipset USB Controllers (Generic ID)
 Subsystem Vendor 8086h Intel Corporation
 Address 4 is an I/O Port : 00002440h
 System IRQ 10, INT# D

 Vendor 10ECh Realtek Semiconductor
 Device 8139h RT8139 (A/B/C/8130) Fast Ethernet Adapter
 Command 0107h (I/O Access, Memory Access, BusMaster, System Errors)
 Status 0290h (Has Capabilities List, Supports Back-To-Back Trans., Medium Timing)
 Revision 10h, Header Type 00h, Bus Latency 42h
 Self test 00h (Self test not supported)
 PCI Class Network, type Ethernet
 Subsystem ID 813910ECh RT8139 (A/B/C/8130) Fast Ethernet Adapter (Generic ID)
 Subsystem Vendor 10ECh Realtek Semiconductor
 Address 0 is an I/O Port : 00001000h
 Address 1 is a Memory Address (anywhere in 0-4Gb) : 40200000h
 System IRQ 5, INT# A
 Expansion ROM of 64Kb decoded by this card
 New Capabilities List Information :
  Power Management Capabilities
    Supports power state D2
    Supports power state D1
    Current Power State : D0 (Device fully-operational, no power saving)

 Vendor 1102h Creative Labs
 Device 0004h EMU10K2 Audio Chipset (SB Audigy)
 Command 0105h (I/O Access, BusMaster, System Errors)
 Status 0290h (Has Capabilities List, Supports Back-To-Back Trans., Medium Timing)
 Revision 03h, Header Type 80h, Bus Latency 40h
 Self test 00h (Self test not supported)
 PCI Class Multimedia, type Audio
 Subsystem ID 00511102h SB0090 Audigy Platinum 
 Subsystem Vendor 1102h Creative Labs
 Address 0 is an I/O Port : 00001400h
 System IRQ 9, INT# A
 New Capabilities List Information :
  Power Management Capabilities
    Supports power state D2
    Supports power state D1
    Current Power State : D0 (Device fully-operational, no power saving)

 Vendor 1102h Creative Labs
 Device 7003h Audigy Gameport Joystick
 Command 0105h (I/O Access, BusMaster, System Errors)
 Status 0290h (Has Capabilities List, Supports Back-To-Back Trans., Medium Timing)
 Revision 03h, Header Type 80h, Bus Latency 40h
 Self test 00h (Self test not supported)
 PCI Class Input, type Other
 Subsystem ID 00401102h Audigy Gameport Joystick
 Subsystem Vendor 1102h Creative Labs
 Address 0 is an I/O Port : 00001420h
 New Capabilities List Information :
  Power Management Capabilities
    Supports power state D2
    Supports power state D1
    Current Power State : D0 (Device fully-operational, no power saving)

 Vendor 1102h Creative Labs
 Device 4001h Audigy IEEE1394 Firewire Controller 
 Command 0106h (Memory Access, BusMaster, System Errors)
 Status 0210h (Has Capabilities List, Medium Timing)
 Revision 00h, Header Type 80h, Bus Latency 42h
 Self test 00h (Self test not supported)
 Cache line size 32 Bytes (8 DWords)
 PCI Class Serial, type OHCI FireWire
 Subsystem ID 00101102h Unknown
 Subsystem Vendor 1102h Creative Labs
 Address 0 is a Memory Address (anywhere in 0-4Gb) : 40100000h
 Address 1 is a Memory Address (anywhere in 0-4Gb) : 40000000h
 System IRQ 10, INT# B
 New Capabilities List Information :
  Power Management Capabilities
    Supports power state D2
    Supports power state D1
    Current Power State : D0 (Device fully-operational, no power saving)

ROM PCI IRQ routing table Windows 9x Compatibility Tests....
 ROM IRQ routing table found at F000h:6880h
 Table Version 1.0 - OK
 Table size 176 bytes - OK
 Table Checksum 4Ah - OK
 IRQ's dedicated to PCI : None
 The ROM PCI IRQ routing table appears to be OK.

IRQ Summary: IRQs 5,9,10,11,14,15 are used by PCI devices
Shared IRQs: IRQ 10 is shared by 2 PCI Devices