Atari 400 User Manual

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.

Atari 400 Specifications

General

Manufacturer	Atari
Model	400
Type	Home Computer
Release Year	1979
CPU	MOS Technology 6502
CPU Speed	1.79 MHz
ROM	10 KB
Operating System	Atari OS
Keyboard	Membrane keyboard
RAM	8 KB (expandable to 48 KB)
Graphics	ANTIC and GTIA chips
Sound	4 channels
Display	RF output for connection to TV
Storage	Optional cassette tape drive or floppy disk drive
Ports	Cartridge
Display Resolution	320x192 (16 colors)