Manual PCIe-DIO-24HS PCI Express Digital I/O Card
11
Chapter 4: Address Selection
The Vendor ID for this card is 0x494F. (ASCII for "IO")
The Device ID for the PCIe-DIO-24HS is 0x0E54.
The Device ID for the PCIe-DIO-24H is 0x0C53.
This card uses I/O addresses offset from the base address assigned by the PCIe bus. The
address spaces are defined in the programming section of this manual.
PCIe architecture is Plug-and-Play. This means that the BIOS or Operating System
determines the resources assigned to PCIe 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.
The following information is for advanced users only:
The PCIe bus supPorts 64K of I/O address space, so your card's addresses
may be located anywhere in the 0000h to FFFFh range.
To determine the base address that has been assigned, run the PCIFind
utility program. This utility will display a list of all the cards
detected on the PCI/PCIe 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.
In Linux you can use the LSPCI command to determine this information. A
PCIFind.pl script is also provided which may simplify this task.
An example of how to locate PCIe card resources in DOS is provided with
in the PCI\SOURCE directory, under your installation directory. This
code runs in DOS, and uses the PCI defined interrupt BIOS calls to query
the PCI bus for card specific information. You will need the Device ID
and Vendor ID listed above to use this code.
The card uses more resources than you usually need be concerned with.
PCIFind will show only the most commonly required information to reduce
confusion.
For those who require it, be aware of the following:
BAR[0]: memory mapped PEX8311
BAR[1]: I/O mapped PEX8311
BAR[2]: I/O mapped card registers (←all most software needs)
