Getting Acquainted - Sharp PC-1500 Instruction Manual

All and more about Sharp PC-1500 at http://www.PC-1500.info
VJatch close'ly as pairs of numbers appear briefly on the screen. The second number in the pair
(on the right) will be the square of the f irst. Eight pairs of numbers will be displayed because
that is what you asked for when you responded to the program's question.
When the pr ompt returns. re·run the program (type RUN, press l••••• I I and make a different
response to the "LIST SIZE?'' question.
Run t he
program several t imes experimenting wit h
d ifferent list s.izes. You are experienc ing one of the important advantages o f programmable
comput ers; they can perform a t edious task repeatedly, varying it sligh tly each time in response
to the input.
Re·run the program o nce more but th is time e nter a zero for t he list size. What happens?
Yes, the program ends without havi ng produced a list. Although this may seem odd, the PC· 1500
is simply following our instructions.
This illustrates why t he computer is such a po .. verful tool. It car' '
be
prC>grammed to fo llo .. v
different sets of instructions and process the variety of infor mation it is given. Because of t he
instructions in line 20 , if the user's input is zero (or less) the computer skips: over the computa·
tiQn Qf the liit
~ nd
99e1 t9 t he end Qf the pr99ram, In e ffect, it hai made a decision based on the
user's request. As a programmer, you control w h at decisions are possible a nd w hen they are made.
Thus, the full power of the comP<Jt cr is available to you to solve you r specific problem in the
manner you think is best.
I.
GETTING ACQUAINTED
After you l!lnpack you r Sharp Pocket Compute r (hereafter we'll call it SHARP) and admi re
your handsome new friend, you might wonder 1,vhat you 're staring at. Let's examine SHARP :
n eservable
k1:ys
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eioooe:Jo
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a -.111aa111•1111mW_ Cil0
Sh ift
k~y
On ·Off keys
1--+-- Clcar k ey
• • • • • Ill • • •
(!] [fil [[)
[iJ
~-+-Mode ~cv
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l!JIII
~
88
~
CTJ
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~!fl
I
' j ' u
I
llJ (;) _:_
lti_ lfl
L sman
key E1 ltty key
Numeric keys
A lphabetic k eys
We will describe the display in a moment. First. even before you turn on SHARP, notice
several impor ta nt features of the keyboard:
11
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