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HP HP-67 User Manual

HP HP-67
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274
Card
Reader
Operations
The
status
information
recorded
on
the
magnetic
card
along
with
the
program
makes
it
unnecessary
to
load
the
card
in
any
order—you
can
load
either
side
1
or
side
2
first.
The
flag
status,
trigonometric
mode,
and
display
format
information
recorded
on
the
program
card
save
initialization
time
and
program
memory
space
because
when
the
card
is
loaded,
the
calculator’s
flags,
trigonometric
mode,
and
display
format
are
immediately
specified
according
to
the
information
of
the
program
card.
If
a
program
card
does
not
read
correctly,
or
if
information
on
the
card
has
been
altered
(perhaps
by
a strong
magnetic
field),
the
check-
sum
will
be
wrong.
When
you
attempt
to
load
the
program
from
the
card
into
the
calculator
by
passing
it
through
the
card
reader,
the
calculator
will
display
.
You
can
clear
the
error
by
pressing
any
key.
If
a
card read
fails
after
a
portion
of
the
card
has
been
loaded,
that
portion
of
the
calculator’s
program
memory
which
would
have
been
altered
by
reading
the
card
is
cleared
to
instructions,
and
the
calculator
display
indicates
Error
is
also
indicated
if
you
attempt
to
load
a
blank
magnetic
card,
but
the
contents
of
the
calculator’s
program
memory
are
preserved.
The
contents
of
the
stack
and
of
the
data
storage
registers
in
the
calculator
remain
unchanged
when
a
program
is
loaded,
whether
from
a
card
or
manually
from
the
keyboard.
To
clear
a
program
that
has
been
recorded
on
a
magnetic
card,
simply
load
another
program
onto
the
card.
Merging
Programs
Normally,
whenever
you
load
a
program
from
a
magnetic
card
into
the
calculator,
that
program
replaces
the
entire
contents
of
program
memory,
either
with
program
instructions
or
instructions.
All
224
steps
of
program
memory
are
replaced.
However,
you
can
also
merge
programs
in
your
HP-67;
that
is,
you
can
add
a
program
that
is
recorded
on
a
magnetic
card
into
the
calculator,
beginning
with
any
step
of
program
memory.
When
you
merge
a
program
in
from
a
card,
steps
000
through
nnn
of
the
original
program
are
preserved.
This
feature
permits
you
to
add
to
or
alter
a
program
that
is
already
loaded
in
the
calculator.

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HP HP-67 Specifications

General IconGeneral
BrandHP
ModelHP-67
CategoryCalculator
LanguageEnglish

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