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Commodore VIC-20 - Page 44

Commodore VIC-20
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Color
RAM
is
an
extra
half-K
block
of
memory
starting at
38400.
There
are
also
alterable
areas
in
some
of
the
chips,
like
the
VIC
chip
from
368G4
to
36879
and
the
6522
chips
above
that.
Because
each
memory
location
holds
1
byte,
which
can
have
a
value
from
0
to
255,
only
numbers
in
that
range
can be
POKEd
into
memory.
EXAMPLE:
POKE
36879
,
8
POKE
A
,
B
PRINT
Abbreviation:
?
There
is
no
statement
in
BASIC
with
more
variety
than
the
PRINT
statement.
There
are
so
many
symbols,
functions,
and
parameters
associated
with
this
statement
that
it
might
almost
be
considered
as
a
language
of
its
own
within
BASIC,
a
language
specially
designed
for
writing
on
the
screen.
Quote
mode
Once
the
quote
mark
(SHIFT
2)
is
typed,
the
cursor
controls
stop
operating
and
start
displaying
reversed
characters
which
actually
stand
for
the
cursor
control
you
are
hitting.
This
allows
you
to
program
these
cursor
controls,
because
once
the
text
inside
the
quotes
is
PRINTed
they
perform
their
functions.
The
DEL
key
is
the
only
cursor
control
not
affected
by
"quote
mode."
1,
Cursor
movement
The
cursor
controls
which
can
be
"programmed"
in
quote
mode
are;
Key
Appears
as
â– 
i
S
i
m
D
I
I

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