Chapter 4: Address Selection
The card uses two separate address spaces, each occupying eight consecutive register
locations, for COM A and COM B, respectively. PCI architecture is Plug-and-Play. This means
the BIOS or Operating System determines the resources assigned to PCI cards, rather than
you selecting these resources with switches or jumpers. As a result, the card's base address
cannot be changed, it can only be determined.
To determine the base address that has been assigned to the card, run the provided
PCIFind.EXE utility program (PCINT.EXE for Windows95 systems.). This utility will display a list
of all of the ACCES 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 (Windows 95/98/2000) 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 then
clicking Properties, then selecting the Resources Tab will display a list of the resources
allocated to the card.
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 code for this card is 494F (ASCII for "I/O").
The Device ID code for the card is 1150
PCI supports 64 K of address space, so your card's addresses may be located anywhere in the
0000 to FFF8 hex range.
