Planar DOME Md5/DFP, Installation Manual

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Configuring Display Settings on Windows NT | 53
Setting driver options
The Disable DirectDraw driver option has specific conditions
that may affect your display. Be sure to read the next sections
before you choose this option.
To disable DirectDraw
In the Driver Options field of the DOME tab, select
Disable DirectDraw
. Then click Apply or OK.
DirectDraw and multiheaded support
DirectDraw is an API that allows direct manipulation of the
video display. DirectDraw applications expect the screen to
be represented as a single element. If you are using multiple
Md5/DFP screens, then more than one screen represents the
Windows NT desktop.
DirectDraw limited screen size
Under the Windows NT 4.0 operating system, Build 1381,
DirectDraw supports screen sizes only up to 2048 x 2048 pixels.
DirectDraw applications may not function properly with bigger
screen sizes.
Microsoft is aware of this problem and plans to correct it in a
future release of Windows NT. Although DOME has made efforts
to provide whatever support possible within this limitation,
DOME cannot ensure DirectDraw compatibility with either
multiple screens or a screen size greater than 2048 x 2048 pixels.
With multiple displays representing the Windows NT desktop,
DirectDraw applications cannot access the entire desktop and
may not work properly.