30
THE KEYBOARD
1. The numeric(top row) keys are used for entering numbers. The letter keys are used
for entering letters.
2. The cursor is the blinking block symbol on the display that indicates where the next
character that is pressed on the keyboard will be entered in the computer.
3. The
Shift
key is used with another key to enter a character into the computer. For
example to enter the "+" character, you must press
Shift
and the key marked "+ =".
If you just press the "+ =" key then the "=" character will be entered.
4. The
key and the
key are used to position the cursor left or right, respectively.
They do not erase any character that is displayed, but you can type over anything in
their positions.
5. To enter a space, simply press the
Space
bar. Each time you press the
Space
bar,
one space is inserted on the display line.
6. The
Ins
and
Del
keys are used to insert or delete one character at a time on the display
where the cursor is positioned.
When the
Ins
key is pressed once, it will be in insert mode. The cursor will appear
as a rectangle. All characters to the right of the cursor position will be shifted one
character to the right to make room for the new character once it is inputted through
the keyboard. Pressing the
Ins
key again will return to the overwrite mode. The cursor
will now appear as a line. New characters will overwrite the characters to the right.
The
Del
key is used to delete one character at a time. The
Del
key will shift all characters
to the right of the cursor one position to the left, thereby erasing the character under
the cursor.
7. Before anything on the display is actually sent, you must press the
Enter
key. This
key acts much like a Return key on a typewriter. You press all the keys that comprise
a statement to the
PRECOMPUTER PRESTIGE
TM
learning unit and then press
Enter
.
PRECOMPUTER PRESTIGE
TM
will take it from there.
8. Every time BASIC is selected, it is in the overwrite mode. That is, the characters you
type will replace any characters already on the screen, unless you use the
Ins
key.
9. The "^" character in the
key (which is used only in the BASIC program) is used
to tell the computer you want to raise the number preceding it to a power of the number
following it. More on arithmetic later.
10. The
Break
key is used as a
Break
which means it can do one or two things. When
you are typing a line, but before you press
Enter
, it will erase all that you have typed;
or, if you are running a BASIC program, you can interrupt it by pressing the
Shift
and
Break
keys simultaneously. You can restart a program by typing
CONT
and pressing
the
Enter
key.
When using the
INPUT
command,
PRECOMPUTER PRESTIGE
TM
will ask you to supply
it with some data from the keyboard.
PRECOMPUTER PRESTIGE
TM
tells you it needs
input with a prompt. The prompt is the "?" symbol and it appears on the display indicating
that the computer is waiting for you to type something. The letters and numbers that
you press appear on the display.
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