<s>
The	O
HP-15C	B-Device
is	O
a	O
high-end	O
scientific	O
programmable	B-Application
calculator	I-Application
of	O
Hewlett-Packard	O
'	O
s	O
Voyager	B-Device
series	I-Device
produced	O
between	O
1982	O
and	O
1989	O
.	O
</s>
<s>
The	O
HP-15C	B-Device
is	O
a	O
high-end	O
scientific	O
pocket	O
calculator	O
with	O
a	O
root-solver	O
and	O
numerical	O
integration	O
.	O
</s>
<s>
A	O
member	O
of	O
Hewlett-Packard	B-Device
Voyager	I-Device
series	I-Device
of	O
programmable	B-Application
calculators	I-Application
,	O
it	O
was	O
produced	O
between	O
1982	O
and	O
1989	O
.	O
</s>
<s>
The	O
HP-15C	B-Device
was	O
a	O
replacement	O
for	O
the	O
HP-34C	B-Device
.	O
</s>
<s>
The	O
15C	O
used	O
CMOS	B-Device
technology	O
for	O
its	O
processor	O
,	O
resulting	O
in	O
very	O
low	O
power	O
consumption	O
.	O
</s>
<s>
It	O
is	O
based	O
on	O
a	O
flashable	O
controller	O
utilizing	O
the	O
same	O
ARM7TDMI	O
core	O
already	O
used	O
in	O
the	O
2008	O
revision	O
of	O
the	O
12C	B-Device
but	O
in	O
a	O
different	O
package	O
,	O
an	O
Atmel	O
AT91SAM7L128-AU	O
running	O
an	O
emulator	O
written	O
by	O
Cyrille	O
de	O
Brébisson	O
to	O
execute	O
the	O
old	O
HP	O
Nut	O
code	O
much	O
faster	O
than	O
on	O
the	O
original	O
hardware	O
.	O
</s>
<s>
The	O
calculator	O
was	O
released	O
alongside	O
the	O
HP	O
12c	B-Device
30th	O
Anniversary	O
Edition	O
.	O
</s>
<s>
This	O
model	O
is	O
powered	O
by	O
two	O
CR2032	B-Algorithm
batteries	I-Algorithm
,	O
and	O
can	O
easily	O
be	O
differentiated	O
from	O
the	O
original	O
model	O
by	O
the	O
"	O
Limited	O
Edition	O
"	O
script	O
below	O
the	O
company	O
logo	O
as	O
well	O
as	O
the	O
black	O
text	O
on	O
brushed	O
metal	O
back	O
label	O
,	O
as	O
opposed	O
to	O
the	O
white	O
text	O
on	O
black	O
of	O
the	O
original.The	O
power	O
consumption	O
of	O
the	O
processor	O
is	O
greater	O
than	O
that	O
of	O
the	O
original	O
HP-15C	B-Device
,	O
as	O
HP	O
did	O
not	O
use	O
the	O
same	O
technology	O
in	O
any	O
of	O
the	O
future	O
models	O
.	O
</s>
<s>
HP-15C	B-Device
:	O
</s>
<s>
HP-15c	B-Device
Limited	O
Edition	O
:	O
</s>
<s>
The	O
original	O
HP-15C	B-Device
self-test	O
keystrokes	O
do	O
not	O
work	O
with	O
the	O
HP-15C	B-Device
LE	O
and	O
can	O
corrupt	O
memory	O
contents	O
.	O
</s>
<s>
It	O
closely	O
emulates	O
the	O
functionality	O
of	O
the	O
original	O
HP-15C	B-Device
by	O
running	O
the	O
original	O
ROM	O
image	O
in	O
an	O
emulator	O
on	O
an	O
ARM	O
Cortex-M0-based	O
NXP	O
LPC1114	O
processor	O
.	O
</s>
<s>
Deviating	O
from	O
the	O
original	O
,	O
these	O
calculators	O
feature	O
a	O
dot-matrix	O
display	O
,	O
switchable	O
fonts	O
and	O
clock	O
speeds	O
,	O
and	O
,	O
based	O
on	O
a	O
Silicon	O
Labs	O
CP2102	O
converter	O
chip	O
,	O
they	O
come	O
with	O
a	O
USB	B-Protocol
(	O
Mini-B	O
)	O
serial	O
interface	O
to	O
exchange	O
data	O
with	O
a	O
PC	O
etc	O
.	O
</s>
<s>
for	O
backup	O
purposes	O
and	O
possibly	O
to	O
communicate	O
with	O
applications	O
(	O
like	O
PC-based	O
HP-15C	B-Device
emulators	O
)	O
or	O
to	O
update	O
the	O
firmware	O
.	O
</s>
<s>
In	O
September	O
2015	O
,	O
SwissMicros	O
introduced	O
the	O
DM15L	O
,	O
a	O
version	O
of	O
the	O
calculator	O
about	O
the	O
same	O
size	O
as	O
the	O
original	O
HP-15C	B-Device
.	O
</s>
<s>
It	O
still	O
comes	O
with	O
a	O
USB	B-Protocol
Mini-B	O
connector	O
.	O
</s>
<s>
Powering	O
via	O
USB	B-Protocol
is	O
not	O
supported	O
.	O
</s>
