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'''''[NOTE:''' This article's original text was based on [http://forum.osdev.org/viewtopic.php?f=13&t=31328 a post in the forum]. It needs further cleanup and review.
At the lowest level we have the device drivers, which communicate with the actual hardware. These need to be able to work with either the specific display devices - the video memory, the GPU if any, the video signal generators, and even the monitor - or some common subset of it which it shares with disparate adapters. However, this does not mean that the driver must do all the work alone. The VESA VBE/Core defines a standard minimal interface to the hardware as an extension BIOS, which a complaint video adapter should provide as a way of interfacing with the hardware without needing any proprietary details of the adapter.
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