The Display; Error Messages - Sharp PC-1500 Instruction Manual

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F. THE DISPLAY
Press ON. Th• "glass w indow" part of the computer is called the "display," It looks something
like this:
[ >
...
PRO
•
On the display you should see an ) (called a "prompt"), several w ords or abbrev iations, a nd
a dot (ind icating that the battery is functioning). Do not be concerned
if the specific abbrevia·
t ions appea<i ng on you r d i splay are not those of our i llustration. T hese sym bols ch ange as you
operate SHAnP.
G. The CURSOR and the PROMPT
At the far left of the d isplay, find the prompt symb ol( > ); it prompts you to talk to SHARP.
When the "pro1npt" appears it mear)s SHARP has no immediate plans and a\•1aits your bidding.
Type a letter o f your choice. It replaces > a t the left of the d isplay. wh ile to the right of your
letter appears a _ (underline symbol). This is a c ursor. As you press each key. the cursor inches
its w ay across the display, indicating .,.,here the ne>: t symbol you type will appear.Type you r name
and note the movement of the cursor.
If you type more than 25 characters, the limit that can be displayed a t one time the entire line
shifts left. (Try it!}. Charac ters "pushed off" the screen arc not lost: they remai n in SHARP
as part o f the
~y pe d
line , up to a maximum of 80 characters t'or any single line. We will see how
to "recall" and hO\Y to change these
characters
~n
a later section.
H. CLEAR
(The red lcLI key in the upperright
corner~
Push this button and you Cl ear the d isplay of its contents. Use it to erase the characters
that you just ·typed in. Notice that the prompt has re tu rned , indica ting tha t the computer is
again \¥aiting for your commands.
The clear key is also used to cancel an inco:rrect command. (See the section on Error messages
below).
I. ENTER
As you type into the computer. the letters or nu mbers a ppear o n the d isp lay. SHARP will take
NO ACTION, however, until you signal that y ou have finished typing (afte r all, it can't read your
mind I. Th is is done by pressing the
ENTER
key after your other keystrokes. At this point. the
com puter will scan the characters you have t yped for correct form. Certai n errors, but by no
mear'~S
all
errors. will cause your input to be rejected.
REMEMBE R: Press the
fEHTEa l
key each time you '<Vish to enter an instruction or item of data
i nto the mach ine.
J. ERROR MESSAGES
Press the fol lowing keys:
CD G:J
o:J
!
= I
Now press
I
ENTER
I.
The answer should be displayed. Three, right? No? You get "ERROR 1" as your answer?
Is your compu1er defective? Neve'! Th ere's a mistake in the form of the command. "ERROR
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