Multi-monitor is supported on most Intel® 852GM Chipset-based systems through the use of an additional graphics controller designed into the chipset. The Intel 852GM Chipset family supports several different multi-monitor options. The availability of each of these options is dependent on the specific motherboard implementation.

Multi-monitor modes are as follows:

• Intel® Dual Display Clone is used to drive multiple displays with the same content.
• This mode is beneficial when using displays of various types and sizes. For example, one pipe driving an integrated liquid crystal display (LCD), while the other drives an analog overhead projector only supporting specific resolutions and refresh rates.
• To activate Intel Dual Display Clone, click the Intel(R) Dual Display Clone icon the Devices tab of the Intel® 82852/82855 GM/GME Graphics Controller Properties window. Choose the Primary Device and the Secondary Device and click Apply.

  

  Figure 1: Intel Dual Display Clone as seen in Windows* XP Advanced Display Properties Intel® Extreme Graphics Devices tab

Extended Desktop

• An important use for multi-monitor is allowing for a large Windows* desktop spanning multiple displays and creating more viewing than one display.
• The display applet in Control Panel or the Devices tab in the Intel® 82852/82855 GM/GME Graphics Controller Properties window can be used to configure the size and relative position of each monitor. (Figure 2)
• Applications can be moved from one monitor to another, or can be on more than one monitor simultaneously.
• To activate Extended Desktop, click the Extended Desktop icon on the Devices tab of the Intel 82852/82855 GM/GME Graphics Controller Properties window. Choose the Primary and Secondary Device, and click Apply.

  

  Figure 2: Extended Desktop as seen in Windows XP* Advanced Display Properties Intel® Extreme Graphics Devices tab

The Display item on the Settings tab in Control Panel can also be used to enable this mode. The Intel 82852/82855 GM/GME Graphics Controller Properties window must be used to access Extended Desktop if Intel Dual Display Clone is currently enabled. (Fig. 3)

Figure 3: Display item on the Settings tab in Control Panel as seen in Windows XP display properties

Applications behave differently in a multi-monitor configuration depending on their implementation:

• Standard Windows applications using the GDI (Graphics Device Interface) clip the window to each display and accelerate the images separately using the display hardware.
• Applications spanning multiple monitors and using DirectX*, Direct3D*, or DirectDraw*, can be software accelerated.
• OpenGL* applications might exit unexpectedly, or hardware accelerate one display with unknown results on the other, or be software accelerated.
• A full screen command prompt or MS-DOS* application only functions on the primary device.

Dual-Pipe Panning

• Dual-Pipe Panning allows a high-resolution display on a larger screen, while viewing a zoomed-in version on a smaller screen.
• The view on the smaller screen is tied to mouse cursor movement. Since the screens are different sizes, the mouse cursor can be at different positions on either screen.
• While it is within the zoomed-in area of the smaller screen, the cursor acts as normal. As the cursor moves near the edge of the smaller screen, the view pans toward the cursor until the edge of the full screen is reached. This does not affect the view on the larger screen, which stays the same regardless of the activity of the smaller (panned) screen.
• Dual-Pipe Panning is used in conjunction with Intel Dual Display Clone or Multi. To use Dual-Pipe Panning, first enable Intel® Dual Display Clone or the Multi function. Then, set the cloned display devices to a larger resolution than one of the cloned displays supports and click Apply. The device not supporting the full resolution is panned.

Intel® Dual Display Multi

• Intel Dual Display Multi features two displays driven by one pipe in Intel Dual Display Twin mode. A third independent display works with a separate pipe.
• Intel Dual Display Multi is especially useful in environments where the user is displaying content using multiple displays while simultaneously working on their own display. An example would be if a system user runs a demo on two displays while taking notes on the third.
• To activate Intel Dual Display Multi, first enable Extended Desktop. Click the Enable Twin Configuration checkbox and click Apply. This action requires three attached display devices like an internal laptop display, a CRT monitor, and a television. (Figure 4)

  

  Figure 4: Enable Twin Configuration as seen in Intel® Extreme Graphics Devices tab.

System requirements for multi-monitor:

• An integrated Intel 852GM Chipset family with dual pipe enabled by the system manufacturer
• Two or more display devices (for example, CRT, Flat Panel, and TV)
• Windows 98*, Windows 98 Second Edition* (SE), Windows Millennium Edition* (Me), Windows 2000*, or Windows XP*
• Current graphics driver for the Intel 852GM Chipset family

This applies to:

Intel® 82852/82855 Graphics Controller Family