All and more about Sharp
PC
-1500 at http
:/l
www.PC-1500.info
VIII. BEGINNING
PROGRAM
EXECUTION
A. The
DEF
k ey
The
DE
F
ke
y (short f
or
define) provides
se
veral timc
·so
vlng s
hortcuts
...
A.1. Running DE Finable Programs
The DEF
key
is
the
th
ird
me
t
hod
of
begi
nning
a program.
A.
we
have seen in
the
section
on
the RUN
command.
a program may be "labeled'"
with
a le
tte
r.
The
DEF key may be used
to
quickly initiate a labeled program. This
is
done
by
pressing the DEF key followed
by
the
a
lphabeti
c key which
corresponds
to
the
labe
l of
th
e
program
. The following
keys
may
be
used
in
this
manner
:
A,
S,
D,
F, G,
H,
J,
K,
L,
Z,
X,
C,
V,
B.
N,
M, SPACE a
nd
=
As
an example. en1er t
h•
following statements
to
cre
ate three labeled programs:
Program Listing:
10
"Z"
: GOSUB
500
20
PRINT "Z KEY"
30
END
140
"A"
: GOSUB
500
150
PRINT
"A
KEY"
1
60
END
270
..
" : GOSUB
500
280
PRINT "SPACE
KEY"
290
END
500
CLS : PAUSE
"YOU PRESSED THE
510
RETURN
...
In
RUN
mode, 1rY beginning each program wi th the DEFine key. Notice
that
specifying a
letter for
which
no
corresponding
lab
e
led
pr
ogram
exisuwill
produce
an ERROR 11.
A.2.
Pre-assigned Keywords
A few
of
the most
fr
equently used key\vords have been permanently assi
gn
ed
to
a single
alphabetic key in
the
second row
of
the
keyboard. The
se
keywords may be retrieved. in any
mode,
by
pressing
th
e DEFine key followed
by
one of the alphabetic keys. For example,
to
retrieve the keyword USI
NG
type:
t
32
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