AT&T 6300 Programmer's Manual page 453

Syntax
mode
burst
apage
vpage
SCREEN
Statement
Sets the screen attributes that will be used by
subsequent statements.
SCREEN [mode] [, [burst] [,
[apage] [,vpage] ] ]
is a numeric expression resulting in an integer value of 0, 1,
2, or 100.
It
defines either Text Mode (0), Medium-Resolution
Graphics Mode
(1),
High-Resolution Graphics Mode
(2),
or
Super-Resolution Graphics Mode (100).
is a numeric expression resulting in an integer value of 0 or
1.
It
enables color on a color TV set. In Text Mode (mode
+
0) a
o
value disables color, and a 1 value enables color. In
Medium-Resolution Graphics Mode (mode
+
1) a 0 value
enables color, and a 1 value disables color. Both in High-
Resolution and Super-Resolution Graphics Mode (mode
+
2
or 100) the burst value is ignored, as these two modes only
support monochrome. For a standard monitor, this
parameter has no meaning.
is an integer expression in the range 0 to 7 for width 40, or 0
to 3 for width 80. It selects the active page, i.e. the page
to
be
Written to by output statements to the screen. If omitted, the
active page defaults to
o.
This parameter is valid in Text
Mode only.
is an integer expression in the range 0 to 7 for width 40, or 0
to 3 for width 80.
It
selects the visual page, i.e. the page to be
displayed on the screen. The visual page may be different
from the active page. If omitted, the visual page defaults to
the active page. This parameter is valid in Text Mode only.
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