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window manager with hints as to which colormaps to install or deinstall. You provide this
information using the Xlib function XSetWMColormapWindows(). This function sets the
WM_COLORMAP_WINDOWS property for a given window.
4.4.3
Single Bit Depth For All Windows
With the RADEON 7500, all windows created on a particular head must have the same bit
depth. The RADEON 7500 supports bit depths of 8, 16, and 24 bits per pixel on any
graphics head, but once the DECwindows server establishes a bit depth on a particular head,
only windows or visuals with that bit depth can be created.
4.4.4
Default Visual Information
The ATI RADEON 7500 board can only support one visual type at one time. Supported
visual types are 8-bit PseudoColor, 16-bit TrueColor, and 24-bit TrueColor. By default, the
default depth and visual class is 24 bit TrueColor.
To change the default visual, you must assign a value (or a comma separated list of values
for multiple graphics cards) to the symbolic name
DECW$SERVER_DEFAULT_VISUAL_CLASS in the DCL procedure
SYS$MANAGER:DECW$PRIVATE_SERVER_SETUP.COM (the acceptable values and
their meanings are listed in the procedure). To change the pixel depth, edit
DECW$PRIVATE_SERVER_SETUP.COM and define the executive-mode logical name
DECW$SERVER_PIXEL_DEPTH in the system logical name table (this may also be a
comma-separated list for multiple graphics cards).
As an example, to switch to 24-bit TrueColor, add the following lines to
SYS$MANAGER:DECW$PRIVATE_SERVER_SETUP.COM:
$ DECW$SERVER_DEFAULT_VISUAL_CLASS
$ DEFINE/EXEC/SYSTEM/NOLOG DECW$SERVER_PIXEL_DEPTH
You then need to restart the X server. Refer to Section 4.5.3 for more information on
changing default settings and restarting the X server.
4.4.5
No Support for Backing Store and Save Unders
Backing store and save unders are not supported in the Radeon 7500 X server on OpenVMS
version 7.3-1. This feature will be supported in the next Graphics update kit. Refer to the
Release Notes associated with the version you are installing for updated information.
4.4.6
Cloned -Video
If you have monitors connected to both the DVI port and VGA port when you power up the
system, identical video output is displayed on both the monitors. This also applies to the first
card on a muti-card configuration. The DVI ports on subsequent cards are disabled.
4-4 ATI RADEON 7500 AGP and PCI Graphics Controllers
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