Commodore 16 User Manual
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INTRODUCTION
The
purpose ol this chapter is to begin to acquaint
you
wilh
some of the
characteristics and capabilities
of
your
Commodore
16,
and how
to
take the first
steps
toward programming
with your computer
The Screen Display
/
I
Your
Commodore 1
6's
comings and
goings a'e seen on your TV or
monitor display
screen Whatever
you type, whatever your computer
has
lo say about
what
you type, whatever programs
you load . II
all
shows
up
on
your
monitor screen,
whether you're hooked
up to a
colour or Wack and whtte TV, or
a
Commodore
colour
monitor
Your
Commodore
1 B
screen,
no matter what
type
ot monitor or
TV
you're
using,
is
40
columns wide. That means that you can
type
40 characters
trom
Ihe left edge of the screen
lo the right. There, are 25 rows,
so
thai
an entirely filled screen
can contain
spaces tor
1000
(25 X 40)
characters. The Commodore 1
6's
screen
display is made
up of
Ihree
elements: the characters
(the
letters, numbers
and graphic symbols),
Ihe
background,
and the border When
you
first turn your
computer on.
the characters are
black, the background is white, and the boroer is
light
blue You've
already
seen how to change
the
colour
of the
characlers
using the number keys
along
witn
CTRL
or
j£t
,n
Chapter
2. You can make the characters
any of 1
6
different colours in this
fashion.
There are
a
few oiher things
you can do to make
printing
characters more
interesting.
42
i
I
f
I
r
i
i
(
f
i
r
i
i
f
f
[
r
r
i
Reverse Printing and
Changing Colours
Not
only
can you change Ihe colour of the cursor
and
characlers
you
type
(and your
computer
displays)
on your monitor screen,
you can
also reverse the character
and
background
colours. That means
that If
you have Wack characters on
a
while background
and you turn reverse
printing
on (by
typing
coo, and 91 everything
that
appears
on the
screen is reversed:
Ihe
characlers
are in white, while the background
behind
those characters
is
black.
You can experiment with changing
the character
colour and using
reverse printing, by following these
instructions'
STEP1 Hold down
the key and
press
Ihe bvs on
>-.
CTHL
STEP
2 Release the keys and nold down
ihe space bar
STEP
3 Hold down the space bar as long
as
you want While
you
hold
down
the space
bar.
a line the same colour as the letters on
your sceen should
get
longer.
K Ihe line gels to the end of the
row, tt continues
on the next row
STEP
4 Release Ihe space bar (but don't press
the return key).
STEP
5 Hold down the
cm
key and
press one of the colour keys
(not
a
colour
that's already on
your
screen)
As soon as you
do
this, the cursor
changes to the colour of Ihe key
you
pressed.
STEP
6
Hold the
space bar down again. Now your computer draws
a
line in
ihe now colour
Keep changing
colours wilh
the CTtt
or
keys
and
Ihe colour keys. Then
ho'd
down
the space
bar to make more different coloured
lines,
STEP 7 Turn off
reverse prim by holding down
cm
and pressing
the
bvs off key Pressing ihe
return key also turns oh reverse
printing
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