User manual

Chapter 4: Address Selection
The cards use four separate address spaces. COM A occupies 16 consecutive address locations and
COM B, COM C, and COM D each occupy eight consecutive register locations. The two-port versions
of these cards do not have ports COM C and COM D.
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 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 and DMAs (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 PCIFind 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. 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. If you want to determine the base addresses and IRQ' assigned for
yourself, use the following information:
The Vendor ID for these cards is 494F (ASCII for "I/O").
The Device ID for the 422/2 is 1150h.
The Device ID for the 422/4 is 1158h.
The Device ID for the 485/4 is 1151h.
The Device ID for the 485/4 is 1159h.
Manual PCI-ICM-422(485)/2(4)
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