Manual PCI-DIO-24DH
13
Chapter 4: Address Selection
These cards use one address space and occupy sixteen I/O locations. The S03 (which has 3 counters)
version takes up 32 I/O locations.
PCI architecture is Plug-and-Play. This means that the BIOS or Operating System determines the
resources assigned to PCI cards rather than the user selecting those resources with switches or jumpers.
As a result, you cannot set or change the card's base address or IRQ level. You can only determine what
the system has assigned.
To determine the base address that has been assigned, run the PCIFind.EXE 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 (if any) allotted.
Alternatively, some operating systems (Windows95/98/2000) can be queried to determine which
resources were assigned. In these operating systems, you can use either PCINT or the Device Manager
utility from the System Properties Applet of the control panel. These cards are installed in the Data
Acquisition class of the Device Manager list. To display a list of the resources allocated, select the card,
click "Properties", and then select the "Resources Tab".
PCIFind uses the Vendor ID and the Device ID to search for your card, then reads the base address and
IRQ assigned. If you want to determine the base address and IRQ assigned, use the following
information. The Vendor ID for these cards is 494F. The device ID's are:
D version: 0C51
H version: 0C50
D w/Counters: 0E52
H w/Counters: 0E51
The PCI bus supports 64K of address space, your card's addresses may be located anywhere in the
0000 to FFFF hex range.
