User`s guide

Page 9
About Monitor Sensing
AppleÕs Monitor Sensing speciÞcation allows graphics
cards to identify the attached monitor. During startup, the
XCLAIM VR checks the status of three of the Þfteen pins
on the Apple monitor port. It then auto-conÞgures itself
according to the monitor sense code detected and enables
all resolutions supported by the monitor. Since the
XCLAIM VR relies on this sense code to correctly auto-
conÞgure during startup, the monitor must supply the
appropriate sense code.
In a case where your monitor does not directly supply the
sense code information, an adapter can be used to set the
appropriate sense code for your monitor. Typically, an
adapter is used to connect a VGA monitor to the Apple
monitor port, or to simply supply the correct monitor
sense code information.
If the adapter supplies the sense code information for
only one resolution, then that resolution will be the only
one available, even if the monitor supports multiple
resolutions. Therefore, when using an adapter to supply
the sense code, it must be designed to supply the proper
code for the monitor you are using it with; otherwise, the
XCLAIM VR cannot correctly auto-conÞgure itself for the
attached monitor.
Although the XCLAIM VR card does not output Sync-on-
Green (SOG) signals directly, adapters are available that
can overlay the Composite Synchronization Signal and
send it through the Green video signal line so that you can
use an SOG monitor. Monitors requiring an SOG signal
usually have only three BNC connectors (RGB).
For more information about obtaining a sense code or
synchronization signal adapter, contact ATI Customer
Support or ask your dealer. For information about how to
contact ATI Customer Support, select the Support button
on the ATI Displays Control panel.