Sharp PC-1500 Instruction Manual page 90

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F.3. CLS (Clear Screen)
The CLS statement erases the d isp lay
by
turning off
all
of t he dots on the wi ndow. It is used
before other statements to remove any n~sidual data from the display. The cu rsor is repositioned
to the ieft of the screen
by
the
CLS
command .
Th.c
format is simply
CLS.
Demonstration Program
Keystrokes:
10 GPRINT "7F7F7F7F7F"
20 CLS
30 PRINT "NEW INFO"
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1
rnrn mmm1 • ., .. 1
G[)[lD[PJ
[jiJITJ!JO 01
lsHIFT I
c:J !JO
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F.4.
GCURSOR
The GCURSOA statement specifies one of the·
156
columns of dots, available o n the display,
as the beginning column for any subsequent d isplay of information. The format of the GCURSOR
instruction is :
GCU RSOR posi tion·expression
where ;
p osition -expression evaluates to a number in the range O to 155. ll'is number specifies one o f
the 156 7·dot columns o f the display.
NOTE : If
a position ·expression
results in a numl>er i..vh ich is less tha1 ) O or greater than
155.
an
ERROR 19will occur.
The GCURSOR statement is usually used, in conjunction with the GPRINT stateme nt, fo r the
purpose of creating graphic displays !this will be illustrated more thoroughly in the next soction).
Other types of instructions may lollow the GCURSOR statement since this statement does not
write any informaition. GCURSOR merely indicates in which column subS:equent in formation \•Jill
be written. This i~ illustrated by
the
following linC?s:
Program l isting:
10 GCURSOR 50
20 PRINT "A"
30 GCURSOR 80
40 PRINT 26/3
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