Is There No
End to This
Magic?
We now have
2
separate programs
resident
in the computer.
We
know
how
to
run
the
first
one
—
we
just typeRUN. To run the
second one we have
a foxy variation on
RUN
called
RUN
##tt
. . .
and, as you might
suspect,
it
is
similar to LIST###. To RUN the program starting with
line
10,
type
RUN
10
. .
,
and that's just what
happens.
Will
wonders never
cease?
If you have
20
or
30
programs in the computer at the same time,
you
can RUN just
the one you want, provided you know
its starting
line
number.
What's
more, you
can start any program in the middle
(or elsewhere) for purposes of trouble-
shooting
—
a matter we
will
become more
involved in
as
our
programs get longer and more
complicated.
Meanwhile, Back at
the
Ranch
We got into this
whole messy business trying to find a way to slow down our run on the
flight times from Boston to
San
Diego. In
the
process
we found
out a
lot
more about the
Computer
and
learned to build a timer loop. Now let's see if we can build a timer loop into
our big program. First,
let's
erase the test program using lines
2, 3, 4, 5,
6,
7,
& 9 by typing
each of those numbers
followed with l^
|| ^jjf
.
One way to stop
the fast
parade
of
information in our chart
is to put
in
a
STOP. Type
in
85 IF
R
=
600
STOP
... and
RUN.
We know
R
is going to increment to
600,
and that's about half way through the chart, so
600
is a good choice. See how
the
chart
ran
out
to
550
mph then hit the stop
at
600
came
racing down to line
85. Your screen should read
the first part
of
the chart and
BREAK
AT
85
This means the program is stopped,
or broken
at line 85.
You can
now
gaze
at the top
half
of
the chart to your heart's content. To restart the program
merely
type
CONT
56
Again^thfr
##* s represent t&e number
of
ifce
line
you
want
the
RUN
to^tart with.
V
'MAGICIAN'
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