PC4-PRESTO • CompactPCI
®
PlusIO • 4
th
Generation Intel
®
Core™-4xxx Processor
Graphics Subsystem
The structure of the graphics subsystem has changed compared to the predecessor of the Intel 4
th
generation Core
TM
processor. The main graphics interfaces like DisplayPort and DVI are part of the
processor. Only a few sideband signals (DDC/Auxiliary channel, hot plug detection) as well as the VGA
interface is remained at the PCH QM87.
The PC4-PRESTO offers two Mini DisplayPort (mDP) interfaces in the front panel. Adapters to convert
Mini DisplayPort to any other popular interface standard are available.
A 3
rd
DisplayPort is fed to the on-board connector P-DP3. EKF expansion boards like PCS-BALLET
feature the possibility to gain access to the 3
rd
DisplayPort interface.
As an alternate, the PC4-PRESTO can be equipped with an ordinary HD D-Sub 15-lead connector (VGA
style). This connector is suitable for analog signals only. Nevertheless also flat-panel displays can be
attached to the D-Sub connector but with minor reduced image quality.
Independent from the video connector actually in use, Mini DisplayPort, DVI or VGA, the VESA DDC
standard is supported. This allows to read out important parameters, e.g. the maximum allowable
resolution, from the attached monitor. DDC power, +3.3V on DisplayPort connectors, is delivered via
electronic switches to protect the board from an external short-circuit condition (1.5A) and to prevent
back current flows. On the VGA interface a resettable fuse (0.5A) is used supply the +5V DDC power.
Graphics drivers can be downloaded from the Intel web site.
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