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HP 250 - Execute Key; Halt Key

HP 250
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m
CD
HP
2622D
Personal
Workstation
These
keys
move
the
cursor
up
or
down
one
line
from
the
current
position
on
the
display.
Pressing
SHIFT
[JCJ
and
SHIFT
[JCJ
moves
the
cursor
to
the
previous
and
next
display
page
respectively.
The
sketch
on
page
3-2
describes
this
movement
up
or
down,
called
scrolling.
The
HOME
key
moves
the
cursor
to
the
upper
left
of
the
display.
When
SHIFT
HOME
is
pressed,
the
cursor
is
moved
to
the
first
character
of
the
display
storage
area,
which
may
be
on
a
previous
display
page.
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
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.
Pressing
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.
3-7
m
CD
HP
2622D
Personal
Workstation
These
keys
move
the
cursor
up
or
down
one
line
from
the
current
position
on
the
display.
Pressing
SHIFT
[JCJ
and
SHIFT
[JCJ
moves
the
cursor
to
the
previous
and
next
display
page
respectively.
The
sketch
on
page
3-2
describes
this
movement
up
or
down,
called
scrolling.
The
HOME
key
moves
the
cursor
to
the
upper
left
of
the
display.
When
SHIFT
HOME
is
pressed,
the
cursor
is
moved
to
the
first
character
of
the
display
storage
area,
which
may
be
on
a
previous
display
page.
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
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.
Pressing
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.
3-7

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