/proc/pci

cat /proc/pci

The following is the contents of /proc/pci, as detected by Linux-2.0.35 with the PCI bridge optimization support.
PCI devices found:
  Bus  0, device  20, function  0:
    VGA compatible controller: Trident TG 9660 / Cyber9385 (rev 211).
      Medium devsel.  Fast back-to-back capable.  IRQ 255.  
      Non-prefetchable 32 bit memory at 0xfe400000.
      Non-prefetchable 32 bit memory at 0xfedf0000.
      Non-prefetchable 32 bit memory at 0xfe800000.
  Bus  0, device  19, function  1:
    CardBus bridge: Texas Instruments PCI1131 (rev 1).
      Medium devsel.  IRQ 9.  Master Capable.  Latency=64.  Min Gnt=192.Max Lat=7.
  Bus  0, device  19, function  0:
    CardBus bridge: Texas Instruments PCI1131 (rev 1).
      Medium devsel.  IRQ 9.  Master Capable.  Latency=64.  Min Gnt=192.Max Lat=7.
  Bus  0, device   1, function  3:
    Bridge: Intel 82371AB PIIX4 ACPI (rev 1).
      Medium devsel.  Fast back-to-back capable.  
  Bus  0, device   1, function  2:
    USB Controller: Intel 82371AB PIIX4 USB (rev 1).
      Medium devsel.  Fast back-to-back capable.  IRQ 9.  Master Capable.  Latency=64.  
      I/O at 0xf8e0.
  Bus  0, device   1, function  1:
    IDE interface: Intel 82371AB PIIX4 IDE (rev 1).
      Medium devsel.  Fast back-to-back capable.  Master Capable.  Latency=64.  
      I/O at 0xf8d0.
  Bus  0, device   1, function  0:
    Bridge: Intel 82371AB PIIX4 ISA (rev 1).
      Medium devsel.  Fast back-to-back capable.  Master Capable.  No bursts.  
  Bus  0, device   0, function  0:
    Host bridge: Intel 82439TX (rev 1).
      Medium devsel.  Master Capable.  Latency=32.