Planar DOME Md4/PCI Installation Manual page 31

Installing the Md4/PCI Board in a PC 15
DirectDraw and multi-headed support
DirectDraw is an Application Program Interface (API)
that allows direct manipulation of the video display.
DirectDraw applications expect the screen to be
represented as a single element. If you are using one
Md4/PCI board with multiple screens, or multiple
Md4/PCI boards, more than one screen can represent
the desktop.
With multiple displays representing the desktop,
DirectDraw applications cannot access the entire
desktop and may not work correctly.