Chapter 6 NI-VXI Configuration Utility
PCI-MXI-2 for Linux 6-22 ni.com
This type of system configuration is recommended if you have one of the
following situations:
• A VXI/VMEbus mainframe with only slave devices and no masters.
Without bus masters, there is no chance for deadlock. You can
configure the VXI/VME-MXI-2 devices in this mainframe for normal
operating mode.
• A VXI/VMEbus mainframe with both masters and slaves, but the
masters communicate only with the slaves in their mainframe. The
masters never attempt transfers across the MXIbus, so there is no
chance for deadlock when a MXIbus master attempts a transfer
into the VXI/VMEbus mainframe. You can configure the
VXI/VME-MXI-2 devices in this mainframe for normal operating
mode.
• A VXI/VMEbus mainframe in which all masters that perform cycles
across the MXIbus support the VME64 RETRY protocol. You can
configure the VXI/VME-MXI-2 devices in this mainframe for normal
operating mode because all masters that could cause a deadlock will
automatically retry the operation.
VXI/VME Bus Options
Use the options in this group to control features of the VXI/VMEbus
interface on the VXI/VME-MXI-2.
VMEbus System Controller
You can use the System Controller control to override the jumper setting
on the VXI-MXI-2. The VME-MXI-2 does not have an onboard jumper
setting for this option. When the Auto setting (the default setting) is active,
the onboard jumper setting determines if the VXI-MXI-2 is the VXI Slot 0
device. For more information, refer to the VXIbus Slot 0/Non-Slot 0 section
of Chapter 3, VXI-MXI-2 Configuration and Installation.
Otherwise, choose either the Yes or No option. Notice that selecting either
of these options overrides the onboard jumper setting on the VXI-MXI-2,
so it will not matter how the jumper is set. You would need to run the
VXI/VME-MXI-2 Configuration Editor again if you decide to change the
VMEbus System Controller (VXI Slot 0) setting at a later time.
Caution Do not install a VXI/VME-MXI-2 configured for VMEbus System Controller
(VXI Slot 0) into another slot without first reconfiguring it to either Non-Slot 0 or
automatic configuration. Neglecting to do this could damage the VXI/VME-MXI-2,
the VXI/VMEbus backplane, or both.
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