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Atari 400 User Manual

Atari 400
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Atari BASIC Reference
Guide
151
Table 5-2. Screen
I/O
Operations
OPERATION
NUMBER
8
12
24
OUTPUT
INPUT
TEXT
CLEAR
WINDOW
SCREEN
NOTE: The screen
is
always clear in graphi
cs
mode
O.
Graphics
mode
0
has
no
separate text
window.
When
the
screen
is
used w ith an OPEN
statement
instead
of
a
GRAPHICS statement, the PLOT and
DRAWTO
statements
cannot
be used.
Input
and
output
is
performed
with
PRINT, PUT,
and
GET
statements.
Each
of
these statements
require
an 1
10
ch
anne
l
numb
er
that
corresponds
to
the
OPEN
statement
channel
number
.
EXAMPLE
10 GRAPHICS 8
20
COLOR
1
30
PLOT
0,0
40
DRAWTO
10
,
10
50
OPEN
#1,
60,
8,
"S
:"
60
POSITION
5,5
70
GET
#1,
X
80
PRINT X
90
END
The
previous
example
contains a
program
that
uses
the
screen
as
an
input
device. Line
10
has
a GRAPHICS
statement
that indicates
graph
i
cs
mode
8.
Line
20
chooses
color
number
1.
Lines
30
and
40
draw
a sma ll
diagonal
line
in
the
upper
left
of
the
display.

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Atari 400 Specifications

General IconGeneral
ManufacturerAtari
Model400
TypeHome Computer
Release Year1979
CPUMOS Technology 6502
CPU Speed1.79 MHz
ROM10 KB
Operating SystemAtari OS
KeyboardMembrane keyboard
RAM8 KB (expandable to 48 KB)
GraphicsANTIC and GTIA chips
Sound4 channels
DisplayRF output for connection to TV
StorageOptional cassette tape drive or floppy disk drive
PortsCartridge
Display Resolution320x192 (16 colors)

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