# 9 Imagine 128 PCI-Bus Display Adapter
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¬ Display Devices

This PCI bus device driver automatically detects the target adapter.  

Supported Hardware: 
	#9 Imagine 128 based display adapters with 4MB memory

This device driver supports the Imagine 128 graphics adapter from Number Nine Computer Corporation.  This adapter is based on #9's Imagine 128 graphics controller chip and supports 4MB of VRAM. It uses TI's TVP3025 video interface palette, either the 175MHz version which supports displays up to 1600x1200 at a 60Hz refresh rate, or the 220MHz version which supports displays up to 1600x1200 at a 72Hz refresh rate.  The TVP3025 also supports the RGB:444/16 color space, which gives a performance advantage with no video quality degradation in comparison with palettes which support the RGB:555/16 color space.

This driver supports the following 4MB display modes. 

8-bit Color	16-bit Color	32-bit color

640x480	640x480	600x480
60, 72 or 76 Hz	60, 72 or 76 Hz	60, 72 or 76 Hz

800x600	800x600	800x600
60 or 72 Hz	60 or 72 Hz	60 or 72 Hz

1024x768	1024x768	1024x768
60, 70 or 76 Hz	60, 70 or 76 Hz	60, 70 or 76 Hz

1152x864	1152x864	1152x864
60, 72 or 76 Hz	60, 72 or 76 Hz	60, 72 or 76 Hz

1280x1024	1280x1024	1280x1024
60, 72 or 76 Hz	60, 72 or 76 Hz	60, 72 or 76 Hz

1600x1200	1600x1200
60 Hz	60 Hz

If the TVP3025 on your display adapter is the 220MHz version, the device driver supports the following additional display modes. 
Do not select these modes if you don't have the 220MHz version of TVP3025 RAMDAC. See Warning below.

8-bit Color	16-bit Color

1600x1200	1600x1200	
72 Hz	72 Hz

Supported Displays:  NeXT designs and tests its display adapter device drivers using very high frequency displays that can support display modes with very high resolutions and non-interlaced refresh rates, such as the NEC 5FG, NEC 6FG, and Nokia Multigraph 445X.  Read the owner's guide that comes with your display to ensure it can support the display mode you set in Configure.

Multi-headed Displays:  This driver provides multi-headed display support, if a few requirements are carefully observed.  

Multi-headed support on OPENSTEP for Mach 4.0 provides useful features:
+ 	Up to 8 displays may be used simultaneously
+ 	All Imagine 128 display adapters need not be set to the same display mode.  This allows the use of less expensive monitors for the secondary displays, or to have a UI presented at different resolutions or under different color models by simply dragging a window to a different 'head'.

The Imagine128 display adapter has a pair of jumpers that are used to enable or disable VGA compatibility.  Consult the documentation provided with your Imagine128 display adapter for details.  

Exactly one Imagine 128 display adapter must have VGA compatibility enabled.  This adapter is the 'primary' display adapter and will be the display used for booting, the login panel, the Dock, alert panels, and SoftPC.  The primary Imagine 128 display adapter must be configured as the first instance of the Imagine128 Display Driver.  

The easiest way to guarantee that this condition is met is to install the driver and configure the system for a single (primary) Imagine128 Display Adapter.  

Once the configuration for the primary display is working, secondary Imagine128 Display adapters may be added in any order.  All other Imagine 128 display adapters in the system must set jumpers for VGA compatibility disabled.  

These secondary adapters present additional screen real estate, and may be configured in any order after the primary, although the order in which you configure them dictates the order in which the displays build to the right of the primary.  Note that each additional adapter requires system memory. 

Additional requirements or problems with multiheaded support are:
+ 	All displays must be driven by Imagine 128 display adapters, although different models of the Imagine 128 may be mixed in one system.
+ 	Secondary displays only build to the right of the primary display.  No other alignment options are available.
+ 	All the desktop UI components (the Doc, alert panels) appear on the primary display.
+ 	Not all Backspace modules or screen dimmers may work correctly on secondary displays
+ 	Secondary displays may not be blanked during shutdown of the system.
+ 	Use of the added screen real estate requires additional system memory for suitable performance.  Avoid placing windows that straddle more than one display.

Warning: Some vendors claim that you can use their display adapters at display modes with resolutions and refresh rates that exceed what their RAMDACs can support.  You can permanently damage your display adapter and computer by doing this.  Read the owner's guide that comes with your display adapter or contact its manufacturer to ensure that your adapter's RAMDAC can support the display mode you set in Configure.

Warning:  If you plan to change display adapters, be sure to use the Configure application to change the display driver to Default VGA Adapter before you remove the old display adapter (see NeXTanswer 1824 for details on changing display adapters). 

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See also

·	"Add a Device" in Configure's on-line help.

·	See NeXTanswer 1824 for general information on installing and configuring device drivers.