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Chapter 6 NI-VXI Configuration Utility

Default Controller (LA –1)

Many NI-VXI functions use controller as a parameter with –1 accepted as

a valid value. You use this selection to determine which controller you are

referring to when you use –1 in these NI-VXI functions. Review the

descriptions of the NI-VXI functions to determine which are applicable for

this control.

By default, the Default Controller (LA –1) option is set to First remote

controller, so that any NI-VXI functions that are passed the value of –1 for

the controller parameter will be executed on the first VXI/VME-MXI-2 in

the MXI-2 chain. If you select the Local controller option, the NI-VXI

functions execute on the PCI-MXI-2.

System IRQ Level

The remote controllers—in this case the VXI/VME-MXI-2—can report

events such as triggers and DMA to the PCI-MXI-2 through a VXI IRQ

line. This field selects which VXI IRQ level the remote controllers should

use to report events to the PCI-MXI-2.

Servant Area Size

This field designates the servant area size, which is supplied to the

Resource Manager in response to the Read Servant Area command (if the

PCI-MXI-2 is not the Resource Manager in your system). The servant area

size is an 8-bit value (0 through 255) that indicates the servant area. The

servant area begins at the logical address following the PCI-MXI-2 logical

address, and includes N contiguous logical addresses, where N is the value

of the servant area size. This field is meaningful only when the PCI-MXI-2

is configured as a message-based device.

Note If the PCI-MXI-2 is the Resource Manager (Logical Address 0), this setting is

irrelevant.

Interrupt Request Levels Default Value

1 to 7 1

Servant Area Range Default Value

0 to 255 0

National Instruments MXI User Manual

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