User`s guide

Page 9 Installing Your Card
be available for selection. For more information, refer to
About Monitor Sensing below.
Installation of your XCLAIM GA is now complete and
you are ready to install the software. Refer to Chapter 3,
Installing Your Software .
About Monitor Sensing
AppleÕs ÒMonitor SensingÓ speciÞcation allows graphics
cards to identify the attached monitor. During startup,
the XCLAIM GA 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 GA 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 GA cannot correctly auto-conÞgure itself for
the attached monitor.
Although the XCLAIM GA 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).
NOTE
NOTE
ATIBook Page 9 Wednesday, April 2, 1997 9:50 AM