In additional to being able to
display 256 colourss these can be selected form a palette of over 250,000 colourss. Compared to the prattle of 16 colourss made available by other adapters this is an incredible number and it makes it
possible to produce very subtle colours changes.
If you find this discussion of video standard confusing
then the following table provides a summary. That is important however is
that VGA provides a standard that is
backward compatible with all of
the other video modes.
Resolution
|
Colourss
|
Palette
|
Adapter
|
320
x 200
|
2
|
16
|
CGA-EGA-VGA
|
320
x 200
|
16
|
16
|
EGA-VGA
|
320
x 200
|
256
|
256K
|
VGA
|
640
x 200
|
2
|
16
|
CGA-EGA-VGA
|
640
x 200
|
16
|
16/256K
|
EGA-VGA
|
640
x 200
|
4
|
64/256K
|
EGA-VGA
|
640
x 200
|
16
|
64/256K
|
EGA-VGA
|
640
x 200
|
2
|
256
|
VGA
|
640
x 200
|
16
|
256
|
VGA
|
720
x 348
|
2
|
2
|
HGA-EGA-VGA
|
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