PCI Info

PCI Info is a small program which shows you some information about the devices on your PCI and AGP bus.
The current version shows which PCI devices are capable of running at 66 MHz, and which IRQs they use, their latency timer value, and if they are capable of bus mastering.
For the AGP devices it also shows if the are able to run at 2x speed.

You can download the latest freeware version here:
PCI Info ver 1.10

Here is an example of the output of the program:

PCI/AGP Device Info, v1.10      **** Freeware ****
Copyright 1997-1998 by Miro Wikgren

Found Intel PCI BIOS Version 2.10
Vendor                    Device   Device Type           IRQ 66  2x Lat BM  Bus
--------------------------------------------------------------------------------
Intel                      7190h CPU-to-PCI Bridge        No  N  2x  64  Y  PCI
Intel                      7191h PCI-to-PCI/AGP Bridge    No  Y      64  Y  PCI
Intel                      7110h PCI-to-ISA Bridge        No  N       0  Y  PCI
Intel                      7111h IDE Controller           No  N      64  Y  PCI
Intel                      7112h USB Controller            9  N      64  Y  PCI
Intel                      7113h Power Management         No  N       0  N  PCI
SMC                        0005h Ethernet Controller       9  N      64  Y  PCI
3Dfx                       0001h Video Adapter            No  N       0  N  PCI
Matrox                     0521h VGA Display Adapter      11     2x  64  Y  AGP

The acronyms:

 66: Supports 66 MHz PCI bus
 2x: Supports 133 MHz AGP Bus (1x means support for 66 Mhz AGP only)
Lat: Latency timer value for the device
 BM: Capable of PCI bus mastering