Atari 800

Atari BASIC Reference Guide 175
SETCOLOR (SE.)
The SETCOLOR statement is used to assign a color and
luminance value to the color register specified.
CONFIGURATION
SETCOLOR register #, color, luminance
The color register must range from 0 to 4 inclusive. The color
must range from 0 to 15 inclusive. These values and their
corresponding colors are listed in Table 9-3. The luminance can
range
from 0 (darkest) to 14 (brightest).
Each of the 5 color registers has a default color and luminance
value. These default values are listed in Table 9-2.
SGN
The SGN function returns a +1 if its argument is positive, a -1 if
negative, and a 0 if zero.
SIN
CONFIGURA TlON
SGN (a)
EXAMPLE
100 A = 100
200 X = SGN (A)
300 PRINT X
RUN
1
The
SIN function returns the sine of the angle specified as its
argument. The argument will be assumed in radians unless a DEG
statement precedes the
SIN statement.