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16 | Dome Display
board="dx2pci-2hd.xqa"
This line indicates that you are using a DX2 board (dx2pci) that
supports two heads (-2hd) and that the configuration of the board is
located in the board file dx2pci-2hd.xqa.
The board file is located in the directory /opt/DOMEdx2pci/boards.
Do not modify this file.
See the second code sample on page 13 for configuration of
the second head.
Using visual classes
A visual class (or visual) is the X Window System™ terminology to
describe the characteristics of a display. X defines the visual classes
listed in this table.
Static classes do not support the use of a modifiable colormap, but
the corresponding dynamic classes do.
PseudoColor is a commonly used visual type. Some applications run
only on displays with a PseudoColor default visual class. When the
DX2 board is connected to a grayscale display, you can configure it
to emulate PseudoColor for applications by invoking the X Window
System with PseudoColor as the default visual class.
Static Class Dynamic Class
• StaticGray • GrayScale
• StaticColor • PseudoColor
• TrueColor • DirectColor
WARNING – Default visual class
When connected to grayscale panels, the Dome DX2 board has a
default visual class of GrayScale.
When connected to color panels such as the Dome E3c display,
the Dome DX2 board has a default visual class of PseudoColor.