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HP 250 - Page 49

HP 250
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HP
2649D
Workstation
Execute Key
This
key
executes
the
current
line
or
expression
in
the
display.
For
example,
if
you
typed
in
the
following
sequence:
then
the
value
of
the
line
is
computed
and
output
on
the
display.
Halt Key
HALT
3-30
This
key
halts
a
program
at
the
end
of
a
current
operation.
Unless
overridden
by
the
program,
pressing
the
HALT
key
stops
the
program,
and
the
next
program
line
to
be
executed
is
displayed.
Pressin~
the
HALT
key
is
not
a
normal
way
to
stop
a
program,
and
may
require
reloading
the
program
to
resume
operation.
You
should
note
that
if
you
are
sending
output
to
an
HP
2601
printer,
it
may
continue
to
print
for
a
period
of
time
even
though
you
pressed
the
HALT
key.
Press
SHIFT
HALT
to
stop
the
current
program
from
executing
and
all
Input/Output
operations.
Press
CONTROL HALT
to
abort
all
operations
and
clear
the
user
work
area.
IMPORTANT
You
should
use
the
HALT
key
with
discretion.
Data
may
be
lost
by
halting
a
program.
HP
2649D
Workstation
Execute Key
This
key
executes
the
current
line
or
expression
in
the
display.
For
example,
if
you
typed
in
the
following
sequence:
then
the
value
of
the
line
is
computed
and
output
on
the
display.
Halt Key
HALT
3-30
This
key
halts
a
program
at
the
end
of
a
current
operation.
Unless
overridden
by
the
program,
pressing
the
HALT
key
stops
the
program,
and
the
next
program
line
to
be
executed
is
displayed.
Pressin~
the
HALT
key
is
not
a
normal
way
to
stop
a
program,
and
may
require
reloading
the
program
to
resume
operation.
You
should
note
that
if
you
are
sending
output
to
an
HP
2601
printer,
it
may
continue
to
print
for
a
period
of
time
even
though
you
pressed
the
HALT
key.
Press
SHIFT
HALT
to
stop
the
current
program
from
executing
and
all
Input/Output
operations.
Press
CONTROL HALT
to
abort
all
operations
and
clear
the
user
work
area.
IMPORTANT
You
should
use
the
HALT
key
with
discretion.
Data
may
be
lost
by
halting
a
program.

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