|Type, Precision, Input mode||Scientific, 10 BCD digits, exponent ±99, Reverse Polish Notation|
|Performance Index||9.2 (original HP-15C: 2.7, HP-15CLE from 2011:
195, iPhone4 implementation: 485)
The 15CC is about 3.4 times faster than the original HP-15C but 21 times slower than HP'2 new Limited Edition version.
|CPU & Memory||LPC1114 ARM CPU emulates the NUT processor. Permanent memory.|
|Display||132x16 pixel dot matix LCD display|
|Special features||Mini-USB connector for external access,
eg program saving, operating software update.
Reportedly, it does not exhibit the HP-15C Limited Edition Bugs.
|Original Pricing, Production||Designed and produced by Michael Steinmann
since 2011, 48 Euro in early 2012.
Now (2015) produced and sold by SwissMicros.
|Batteries||One button size cell. To replace the batteries
unscrew the back of the unit and remove the small cover bar in front
of the battery. Do not tighten the screws too much when reassembling
|Dimensions||Length 5.7cm, Width 8.1cm, Height 0.8cm|
Michael Steinmann. SwissMicros.com, see there for firmware updates.
For manuals see HP-15C. See also DM-41 and DM15L.
|Forensic Result||9.000417403 - identical to the classic HP-15C. This is to be expected since the processor emulates the original CPU and presumably uses large parts of the original ROM code.|
|Comment||See the HP-15C
for a list of exciting news on the 15C.
What a cool device! The unit is small and rugged, the dot-matrix display looks very good.
Of course the keys cannot rival the original HP buttons.
|Key Combinations||Turn off calculator, press and hold the
function key, press ON briefly, release the function key.
|Software Update||There is a number of different firmware
versions available on the rpn-calc / SwissMicros site.
For programming details see DM-41. The difference is that my DM-15CC units only have one tiny pinhole in the back which requires a needle to be used. This pinhole servers as PGM button to start programming and RESET button as well. To turn on the serial console use ON+C.
The 15CC hardware only supports 32kB of flash memory so the "DM15CC" or "32k" firmware versions must be used.
Note: If the unit seems dead after programming briefly remove the battery (unscrew back lid).
|Program used to determine the performance index for the DM-15CC, HP-15C LE and HP-15C Classic:
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