Chapter 4: Address Selection
These cards use one address space, occupying sixteen consecutive register locations.
PCI architecture is inherently plug-and-play in nature. 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 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. 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 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 PCIFind or the Device Manager utility from
the System Properties Applet of the control panel. The cards are 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.
PCIFind uses the Vendor ID and Device ID to search for your card, then reads the base address and IRQ
assigned. If you want to determine these yourself, the Vendor ID is 494F (ASCII for "I/O") and the Device
IDs are:
48: 0C60
48S: 0E60
The PCI bus supports 64K of I/O address space, so your card's addresses may be located anywhere in the
0000 to FFFF hex range.
Manual PCI-DIO-48(S)
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