Manual PCI-WDG-CSM
17
Chapter 4: Address Selection
The card uses one PCI address space, occupying 16 consecutive register locations.
PCI architecture is Plug-and-Play. This means that the BIOS or Operating System determines the
resources assigned to PCI cards rather than you selecting those resources with switches or jumpers. As
a result, you cannot set or change the card's base address. You can only determine what the system has
assigned.
To determine the base address that has been assigned, run the PCIFind utility program provided. This
utility will display a list of all of the cards detected on the PCI bus, the addresses assigned to each
function on each of the cards, and the respective IRQs.
Alternatively, Windows systems can be queried to determine which resources were assigned. In these
operating systems, you can use either PCIFind, or the Device Manager utility from the System Properties
Applet of the control panel. The card is installed in the Data Acquisition class of the Device Manager list.
Selecting the card, clicking Properties, and then selecting the Resources Tab will display a list of the
resources allocated to the card.
The PCI bus supports 64K of address space, so your card's addresses may be located anywhere in the
0000 to FFFF hex range.
PCIFind uses the Vendor ID and Device ID to search for your card, then reads the base address and
IRQ.
To determine the base address and IRQ yourself, use the following information.
The Vendor ID for the card is 494F. (ASCII for "IO")
The Device ID for the card is 22C0h.
