Chapter 6 NI-VXI Configuration Utility
VXI/VME-PCI8022 for Solaris 6-18
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National Instruments Corporation
Window Size
The amount of space you can allocate for the user window is system
dependent. You can use the Size control to select th e s ize of the us er
window (minimum of 4 KB, maximum of 2 GB). The more you
increase the size of the user window, the larger the window you can
map in MapVXIAddress().
You can also disable this option. Disabling the user window causes the
PCI-MXI-2 to request the minimum amount of address space on the
PCI bus. With the window disabled, you will be unable to perform any
low-level function calls such as VXIpeek(), VXIpoke(), and
MapVXIAddress().
It is recommended to have a user window of at least 64 KB, and the
default setting for the user window is set at this value. If you are going
to be initiating transfers to a wide variety of addresses in both A24 and
A32, you should increase the size of the user window. Any change you
make to the size of the user window requires that you reboot your
computer.
The size of the driver window, however, is system defined and is not
user configurable.
Note: Neither the user window nor the driver window can be placed below 1 MB
with the Solaris NI-VXI driver. Therefore, the Place below 1MB option
and the Window Base option will always be disabled.
Expansion ROM
Use the Enable expansion ROM control to enable or disable the PCI
expansion ROM. The expansion ROM is enabled by default. It is
recommended to retain the default setting. This option is included in
vxiedit in case future versions of the PCI-MXI-2 do not implement a
PCI expansion ROM.