Manual P104-DIO-96
11
Chapter 4: Address Selection
The system BIOS or operating system will assign the address. This board occupies 32 bytes of I/O
space.
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.EXE, or PCINT 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 boards, and the respective IRQs (if any) allotted.
Alternatively, some operating systems (Windows 95/98/2000) can be queried to determine which
resources were assigned. In these operating systems, you can use either PCIFind (DOS), PCINT
(Windows95/98/NT), or the Device Manager utility from the System Applet of the control panel. The
board 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 I/O space. Your board's addresses may be located anywhere in the 0400 to
FFE0 hex range.
PCIFind uses the Vendor ID and Device ID to search for your board, then reads the base address and
IRQ.
If you want 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 0x0C69.
