This document contains a specification for a
standardized interface to extended VGA video modes and
functions. The specification consists of mechanisms for
supporting standard extended video modes and functions
that have been approved by the main VESA committee and
non-standard video modes that an individual VGA
supplier may choose to add, in a uniform manner that
application software can utilize without having to
understand the intricate details of the particular VGA
hardware.
The primary topics of this specification are
definitions of extended VGA video modes and the
functions necessary for application software to
understand the characteristics of the video mode and
manipulate the extended memory associated with the
video mode.
Readers of this document should already be familiar
with programming VGAs at the hardware level and Intel
iAPX real mode assembly language. Readers who are
unfamiliar with programming the VGA should first read
one of the many VGA programming tutorials before
attempting to understand these extensions to the
standard VGA.
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