Sharp PC-1500A Instruction Manual page 90

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F .3. C LS (Clear Screen)
The CLS statement erases the d isplay by turning o ff a ll of the dots on the w indow. It is <1sed
before o the r statements to remove any res idual data from the display . The cursor is repositioned
to the left of the screen by the CLS command. The forma t is simply C LS.
Demonstration Program
10 GPR INT "7F7F7F7F7F"
20
CLS
30 PRINT "NEW INFO"
fl
Keystrokes:
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F.4. GCURSOR
The GC URSOR statement specifies one of the 156 columns o f dots. available on the display.
as the beginning co,umn fo r any su bsequent d isplay of info rmation . The format o f the GCURSOR
instruction is:
GCU RSOR posit ion-<ixpression
where:
position -expression evaluates to
a
number in the range 0 to 155. TJ)iS number
~pec:if ies
one of
th e 156 7 ·dot columns of t he display .
NOTE : If a position-expression results in a number which is less than 0 or greater than 155. an
E RROR 19 will occur.
The GCURSOR statement is usually used. in conjunction w ith the GPRINT statement. for the
purpase of creating graphic displays !this wi ll be illustrated more thoroughly in the next section).
Oth er types of insiructions may follow the GCU RSOR statement since this statement does not
wrire any information. GCURSOR merely indicates in which column subsequent i nformation v1ill
be written. This is illustrated by the iollowing line<:
Program Listing :
10 GCURSOR 50
20 PRI NT "A"
30 GCURSOR 80
40 P R INT 26/3
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