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OpenGL Performance and Custom Cursors (Windows NT)
Windows NT features custom cursors, such as decorated or animated cursors, in place of the
standard cursor. If you use a custom cursor while running an OpenGL program,
performance may decrease whenever you position the cursor in that program’s window. For
optimum performance of OpenGL programs, Intergraph Computer Systems recommends
that you use only the standard cursors.
Multiple Screen Display (Windows NT)
If your system is set up for dual- or triple-screen display, the video display driver treats the
combined display area as a single canvas that covers all screens. In this Full Canvas style,
windows centered on the canvas are split between screens. This includes most system dialog
boxes. For details, see the video display adapter documentation and Help delivered with the
system, and the
README.TXT files delivered with the video display drivers.
Correcting Video Display Problems
If the system’s video display is black, not synchronized, or distorted after you restart the
system, you may have a video configuration problem.
On a system running Windows NT, use the Last Known Good option to return the system to
the last known good configuration recorded by Windows NT.
To use the Windows NT Last Known Good option:
1. Power down and restart the system.
2. Press the space bar at the following prompt:
Press space bar NOW to invoke the Last Known Good Menu
If the Last Known Good option fails, or if Windows 95 is installed, restart the system in
VGA mode to correct the video configuration problem.
To restart the system in VGA mode:
1. Power down and restart the system.
2. On systems running Windows NT, select the Windows NT Workstation 4.00
[VGA mode] option at the boot screen.
On systems running Windows 95, press the
F8 key when Starting Windows 95...
displays on the screen, then select Safe Mode.
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