AT&T 6300 Service Manual page 44

SYSTEM OVERVIEW
The controllers have two basic modes of operation: alphanumeric
and all points addressable graphics (with additional modes
available within each of these). In the alphanumeric mode, the
display can be operated either in a 40-column by 25-row mode or in
an 80-column by 25-row mode. In both modes, character cell size is
8 dots (pixels) by 16 dots (pixels).
In the graphics mode, three resolutions are available:
• 640 by 400 pixels monochrome graphics
• 640 by 200 pixels monochrome graphics (IBM PC compatible)
• 320 by 200 pixels color graphics (IBM PC compatible).
Note: The AT&T Monochrome Display has a green
foreground on a black background.
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