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General description
Charon-AXP supports emulation of PBXGA graphics card(s) by direct virtualization and provides a virtual console for displaying graphics.
The console starts automatically upon starting the emulator. Its resolution is 800 x 600 by default.
Support for AXP graphics is provided with two components:
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application
Parameter | application |
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Type | Text string |
Value | Specifies the application to open for displaying the graphical console. The pbxga_tv executable file is provided for this. It is located in the same folder as the Charon emulator executable file. Syntax:
When several graphics cards are loaded, the <device name(s)> have to be separated by a pipe character and the application has to be defined for the latest loaded PBXGA card. See examples below. Note that correct consolidation is only possible when screens are of the same depth and size. The <configuration_name> must correspond to the one defined in the configuration file or the configuration_name.icfg file located in the virtual machine home directory if it has been defined from a template. Example:
There is no need to supply display size to PBXGA_TV application. Using PanoramiX/XINERAMA extensions to DECwindows is also possible (topics of proper configuration OpenVMS/Tru64 are not covered here). These extensions allow to join multiple heads in one big virtual screen. The PBXGA_TV virtual display unit has special notation allowing to consolidate multiple frame buffers in single window (topology is flexible, to some extent):
Example:
It is recommended to create a shortcut on the desktop for the pbxga_tv.exe application with the specified parameters in case the graphical display is closed and needs to be reopened. |
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Using PBXGA_TV
The PBXGA_TV display unit starts in passive mode. It displays content of frame buffer but does not react on keyboard input and/or mouse movements. In order to switch it to active mode, place mouse cursor with the window and click once. When PBXGA_TV is active, mouse cursor is stuck to PBXGA_TV window. Press CTRL+SHIFT+R to release.
The PBXGA_TV display unit starts in Window Mode. Use CTRL+SHIFT+F to toggle Full Screen Mode.
The PBXGA_TV application uses libsdl to draw its window. Copy of SDL.dll comes (version 1.2-15, unmodified) with Charon-AXP for Windows.
Note, that using PBXGA_TV in VNC sessions is not suggested. There are known issues with mouse cursor.
Running PBXGA_TV remotely is not supported.
The PBXGA_TV can only consolidate screens belonging to the same virtual machine. It can't consolidate screens belonging to different machines.
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To create a shortcut on the desktop, either:
Once the shortcut is created, check the "Run as administrator" box in its advanced properties. |
Examples
Example 1: 8-bpp graphics on AlphaServer 400
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Example 2: 24-bpp graphics on AlphaServer DS20
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Example 3: two display units, running independently
... load PBXGA_BA GYA set GYA application = "pbxga_tv -c MYCONF -n GYA" load PBXGA_BA GYB size = 1280x1024 set GYB application = "pbxga_tv -c MYCONF -n GYB" |
In the above example, display units have different resolutions.
Example 4: dual head display, 2x 1280x1024
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Example 5: triple head display, 3x 1280x1024
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Example 6: Two screens consolidated in a column in one window
... load PBXGA_BA GYA size = 1280x1024 load PBXGA_BA GYB size = 1280x1024 set GYB application = "pbxga_tv -c MYCONF -n GYA/GYB" |
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