ICS Advent PCI-ICOM485/4, Руководство по эксплуатации продукта

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Manual Number: 00650-148-1 Page 13
Chapter 4: Address Selection
The PCI-ICOM485/4 (/2) card uses four (or two) separate address spaces. COM A occupies 16
consecutive register locations and COM B, COM C, and COM D each occupy eight 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. You can
only determine what the system has assigned.
To determine the base address that has been assigned, run the provided PCIFind.EXE utility pro-
gram. 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 IRQ’s (if any) allotted.
Alternatively, some operating systems (Windows95 and WindowsNT 5.0) can be queried to deter-
mine which resources were assigned. In these operating systems, you can use either PCIFind
(DOS) or PCINT (Windows95/98/NT), or the Device Manager utility from the System Properties
Applet of the control panel. The PCI-ICOM485/4 (/2) 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, so your card’s addresses may be located anywhere in the
0000 to FFFF hex range.
PCIFind uses the Vendor ID and Device ID to search for your card, 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 these cards is 494F (ASCII for “IO”).
The Device ID for the PCI-ICOM485/4 (/2) is 1159h.