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Atari XL User Manual

Atari XL
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Characters
109
used
to
display
characters
similar
those
in
mode
0;
modes
1
and
2.
GRAPHICS
MODES
1
AND
2
The
characters
in
mode
1
are
twice
as
wide
as
those
in
mode
0, so
the
number
displayable
on
one
line
is
reduced
to 20
(the
preset
margins
do
not
apply
to
Graphics
1
and
2
displays).
Mode 2
characters
are
twice
as
high
and
twice
as
wide,
bringing
the
'number
of
characters
per
screen
or
resolution
down
to 20
by
12.
As
well
as
the
different
sized
characters
the
screen
is
split
into
two
parts
-a
small
section
at
the
bottom
is
reserved
for a
four
line
mode
0
display
while
the
top
portion
is
reserved
for
mode
1
or
2
characters.
The
mode
0
window
means
that
the
number
of
rows
of
characters
that
can
be
displayed
in
modes
1
and
2
is
reduced.
To
see
these
modes
type
in
the
following
program:
5
REM
GRAPHICS
lAND
2
DEMO
10
MODE=l
20 GRAPHICS
MODE
30
PRINT:PRINT"GRAPHICS 0
WINDOW"
40 POSITION
1,5
50 PRINT·#6; "GRAPHICS ";MODE;"
SCREEN"
60
GOTO
60
As
you
can
see
from
the
listing,
PRINT
commands
cause
characters
to
appear
in
the
mode
°
window,
but
another
technique
is
required
to
put
characters-
on
the
mode
1
section
of
the
screen.
To
cause
characters
to
appear
on
the
mode
1
and
2
screens,
the
PRINT
command
is
modified
to
PRINT
16.
This
instructs
the
computer
to
send
the
data
following
the
PRINT
command
to
the
destination
specified
after
the
I
symbol.
In
this

Table of Contents

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Atari XL Specifications

General IconGeneral
Release Year1983
CPUMOS Technology 6502C
GraphicsANTIC, GTIA
SoundPOKEY (4 channels)
StorageCassette tape
PortsCartridge
Operating SystemAtari BASIC
CPU Speed1.79 MHz
RAM64 KB

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