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Cream of the Crop 1
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Cream of the Crop 1.iso
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EDUCATE
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WITB.ARJ
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1992-06-19
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When you type with your word
processor, characters are added to
the screen. If you look closely,
you'll see that the characters are
composed of dots.
One of the expansion cards,
called a display card, is for the
monitor. The simplest card can
display only ASCII text on the
monitor. A Hercules card can
display text and two color (black
plus one color) graphics. This is
called monochrome. A CGA card can
display text in up to 16 colors or
graphics in up to 4 colors. An EGA
card can display text and graphics
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in a higher resolution, meaning
more, smaller dots, in up to 16
colors. And a VGA card is even
higher resolution and can handle
up to 256 colors.
The monitor does not know about
text. All it knows is how to put
dots on the screen. The display
card has to tell it about every
character, number and punctuation
mark it shows. For instance, a ?
is composed of these dots:
(see next screen)
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