B&B Electronics PC Watchdog Timer Card ATRWDT Uživatelský manuál stáhnout pdf (Strana 13)

P104-WDG-CSM User Manual

Chapter 3: Address Selection

The Watchdog Timer uses one PCI address space, occupying 16 consecutive register

locations.

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 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.

Alternatively, Windows systems 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 card 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 address 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.

To determine the base address and IRQ yourself, use the following information.

The Vendor ID for all cards is 494F. (ASCII for "IO")

The Device ID’s are as follows:

P104-WDG-CSME is 2F50h.

P104-WDG-CSM is 2FC0h.

P104-WDG-CSMA is 2FC1h.

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B&B Electronics PC Watchdog Timer Card ATRWDT Uživatelský manuál Strana 13