GE VMIVME-2120 64-bit High-Voltage Digital Output Megamodule
The SVGA port on the VMIVME-7807/VME-7807RC is controlled by the Intel
855GME Graphic and Memory Controller Hub (GMCH). The GMCH is hardware and
BIOS compatible with the industry SVGA and digital video standards supporting
both VESA high-resolution and extended video modes. Table 2-2 and Table 2-3 show
the graphics video modes supported by the GMCH video controller for analog
monitors.
Not all SVGA monitors support resolutions and refresh rates beyond 640 x 480 at
85Hz. Do not attempt to drive a monitor to a resolution or refresh rate beyond its
capability.
NOTES: The VMIACC-0586/ACC-0586RC or the VMIACC-0590/ACC-0590RC
RTMs are required for graphics operation when using the digital video out the P2
backplane connector.
The default setup in the BIOS for Digital Video Output is 800x600.
Table 2-2 Supported Graphics Video Resolutions for Windows 2000 (Analog)
Screen
Resolution Maximum Colors Maximum Refresh
Rates (Hz)
640 x 480 256, High and True
are supported at
all resolutions.
85
768 x 1024 85
800 x 600 85
1024 x 768 85
1024 x 1280 75
1200 x 1600 60
1280 x 1024 75
1600 x 1200 60
Table 2-3 Supported Graphics Video Resolutions for Windows XP (Analog)
Screen
Resolution Maximum Colors Maximum Refresh
Rates (Hz)
640 x 480 High and True are
supported at all
resolutions.
85
800 x 600 85
1024 x 768 85
1080 x 1280 75
1600 x 1200 60

The VMIVME-7807/VME-7807RC have a Digital Visual Interface that provides a
high-speed digital connection for visual data types that are display technology
independent. DVI is a display interface developed in response to the proliferation of
digital flat-panel displays. For the most part, these displays are currently connected to
an analog Video Graphics Array (VGA) interface and, thus, require a double
conversion.
The digital signal from the computer must be converted to an analog signal for the
analog VGA interface, then converted back to a digital signal for processing by the
flat-panel display. This inherently inefficient process takes a toll on performance and
video quality and adds cost. In contrast, when a flat-panel display is connected to a
digital interface, no digital-to-analog conversion is required.
DVI uses Silicon Image's PanelLink, a high-speed serial interface that uses Transition
Minimized Differential Signaling (TMDS) to send data to the monitor. The DFP and
VESA Plug and Display interfaces also use PanelLink. For this reason, DVI can work
with these previous interfaces by using adapter cables (depending on the signal
quality of the adapter.)
DVI also supports the VESA Display Data Channel (DDC) and the Extended Display
Identification Data (EDID) specifications. DDC is a standard communications channel
between the display adapter and monitor. EDID is a standard data format containing
monitor information such as vendor information, monitor timing, maximum image
size, and color characteristics. EDID information is stored in the display and is
communicated over the DDC. EDID and DDC enable the system, display and
graphics adapter to communicate so that the system can be configured to support
specific features available in the display.
DVI Connectors
The DVI connector has 24 pins that can accommodate up to two TMDS links and the
VESA DDC and EDID services. The DVI specification defines two types of connectors
(see Figure 1):
• DVI-Digital (DVI-D) supports digital displays only (used on the
VMIVME-7807/VME-7807RC)
• DVI-Integrated (DVI-I) supports digital displays and is backward compatible
with analog displays (not supported)
The VMIVME-7807/VME-7807RC use the DVI-I connector with a single TMDS link.
The DVI-I interface accommodates a 12- or 24-pin DVI plug connector or a new type
of analog plug connector that uses four additional pins, plus a ground plane plug to
maintain a constant impedance for the analog RGB signals.