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Radio Shack TRS-80 - Page 57

Radio Shack TRS-80
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How to Handle Long Program
Listings
We've
got two programs in the Computer
now.
Let's pull a
LIST
to look at
them.
My, my
they are so long we can't see the end.
Now what
do we do?
Again, more than
one solution.
The easiest
way
to see the rest of
the listing
is to use
the
4
(up-arrow)
key.
Each
time you press
it
(go ahead), the listing
moves
up one line.
Pretty
exciting,
huh? Keep pushing it until you
get a prompt
(
>).
The other solution is
to
use
a
slightly
more sophisticated
version of
LIST. It's called
LIST##
#
(however you pronounce that!).
Type:
LIST 50
A
little
scrutiny
immediately
discloses
that
the Computer gave a listing starting
with line
50
and
either
1)
filled
the screenwith
16 lines,
or
2)
went from line
50
to the end
of the
program, whichever
came first.
LIST### and
+
(up-arrow) can be
used
to find any part
of a very
long
program you
wish.
Again, you must have
a
prompt
in
order to continue
on and do anything else.
Aside from
using one (or both)
of
the
above
techniques
to get to the end of the
LIST
and find a
prompt, there is a
quicker
way,
once
you've
found
what you want in
the
list.
Simply hit the
l=t^m;i
key once
or twice to get a prompt.
;
A$' a:
matter
of
fact,
you
HAVE
to keep
pushing
it,
or do
something else
to
get
tlie
prompt,
sirice
without
the
prompt it just Isn't
yourtunu
The
###*s
;
*epre$eirt
:
iheiaumber
of
the line
you
want th* LISTing
to start from.
55

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