HP-15C

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HP-15C
Hp15c.jpg
HP-15C
Type Programmable Scientific
Manufacturer Hewlett-Packard
Introduced 1982
Discontinued 1989
Cost USD 135 (Original) USD 99.99 - USD 179.99 (15C LE)
Calculator
Entry mode RPN
Display type LCD seven-segment display
Display size 10 digits
CPU
Processor HP Nut core (1LF5 / 1LM2 / 1LQ9[1]) / ARM7TDMI core (Atmel AT91SAM7L128) (15C LE)
Programming
Programming language(s) Keystroke programmable (fully merged)
Memory register 2…66 registers (R0…R9, R.0/R10…R.9/R20, R21…R65) plus RI, X, Y, Z, T, LAST X
Program steps 0…448 lines
Other
Power consumption 0.25 mW
Weight 113 g
Dimensions 128 × 79 × 15 mm

The HP-15C is a high-end scientific programmable calculator of Hewlett-Packard's Voyager series produced between 1982 and 1989.

Models[edit]

HP-15C[edit]

The HP-15C is a high-end scientific pocket calculator with a root-solver and numerical integration. A member of Hewlett-Packard Voyager series of programmable calculators, it was produced between 1982 and 1989. The calculator is able to handle complex numbers and matrix operations. Although out of production, its popularity has led to high prices on the used market. The HP-15C was a replacement for the HP-34C.

The Hewlett Packard 15C from the 1980s
The rear side of a Hewlett Packard 15C.

HP 15c Limited Edition[edit]

After showing a prototype labelled "HP 15c+"[2] at the HHC 2010, HP announced the HP 15c Limited Edition (NW250AA) on 1 September 2011. It is based on a flashable controller utilizing the same ARM7TDMI core already used in the 2008 revision of the 12C but in a different package,[3] an Atmel AT91SAM7L128-AU[4][5][6][7] running an emulator written by Cyrille de Brébisson to execute the old HP Nut code much faster than on the original hardware. The calculator was released alongside the HP 12c 30th Anniversary Edition. This model is powered by two CR2032 batteries, and can easily be differentiated from the original model by the "Limited Edition" script below the company logo as well as the black text on brushed metal back label, as opposed to the white text on black of the original.

Bugs and problems[edit]

HP-15C:

  • CHS stack lift bug (and fix)

HP-15c Limited Edition:[8]

Legacy[edit]

Emulators[edit]

An official PC emulator for the 15C is available as freeware from Hewlett-Packard.[9][10] Another version is commercially available for Android[11] and iOS[12] devices.

Clones[edit]

On 2012-02-06,[13] SwissMicros (previously known as RPN-Calc) introduced a miniature clone named DM-15CC approximating the size of a ID-1 credit card (88 mm × 59 mm × 7 mm). It closely emulates the functionality of the original HP-15C by running the original ROM image in an emulator on an ARM Cortex-M0-based NXP LPC1114 processor. Newer DM15 models feature a better keyboard and more RAM (LPC1115). With a modified firmware (M80 and M1B), the additional memory allows for up to 128 or even 232 registers and up to 1603 or 999 programs steps.[14][15][16][17] A DM15 Silver Edition in a titanium case is available as well in three color variants (metal, brown, blue).[18] Deviating from the original, these calculators feature a dot-matrix display, switchable fonts and clock speeds, and, based on a Silicon Labs CP2102 converter chip,[19] they come with an USB (Mini-B[20][19]) serial interface to exchange data with a PC etc. for backup purposes and possibly to communicate with applications (like PC-based HP-15C emulators[17]) or to update the firmware. In September 2015, SwissMicros introduced the DM15L, a version of the calculator about the same size as the original HP-15C. It still comes with a USB Mini-B connector.

See also[edit]

References[edit]

  1. ^ "HP Voyager Calculator Variants". Brouhaha.com. Retrieved 2017-12-10. 
  2. ^ "HP-15C+ Prototype?". Hpmuseum.org. Retrieved 2017-12-10. 
  3. ^ "Filter News Results - HP Newsroom HP Press Releases". Hp.com. Retrieved 2017-12-10. 
  4. ^ "HP 15c Limited Edition". Finetune.co.jp. Retrieved 2017-12-10. 
  5. ^ "Product End-of-Life (EOL) Notification" (PDF). Media.digikey.com. Retrieved 2017-12-10. 
  6. ^ "Product End-of-Life (EOL) Notification" (PDF). Media.digikey.com. Retrieved 2017-12-10. 
  7. ^ "Product End-of-Life (EOL) Notification" (PDF). Media.digikey.com. Retrieved 2017-12-10. 
  8. ^ Wasserman, Katie (2011-12-26) [2011-09-16]. "HP-15C LE (Limted Edition) Bug Reports". Archived from the original on 2017-12-20. Retrieved 2017-12-20. 
  9. ^ "Emulateurs" (in French). 2014. Archived from the original on 2017-09-17. Retrieved 2017-09-17. 
  10. ^ "HP 15C Virtual Calculator". Hewlett Packard. 2012-11-29. Archived from the original on 2017-09-17. Retrieved 2017-09-17. 
  11. ^ "Hewlett-Packard ships official HP 15c app for Android - Hacker News". news.ycombinator.com. Retrieved 2017-12-10. 
  12. ^ "HP reincarnates calculators on iPhone, Windows". Cnet.com. Retrieved 2017-12-10. 
  13. ^ http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/archv020.cgi?read=210928
  14. ^ http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/archv020.cgi?read=211735
  15. ^ http://gtello.pagesperso-orange.fr/dm15_e.htm
  16. ^ https://bhtooefr.org/blog/2013/04/10/swissmicros-dm-15cc-calculator-review/
  17. ^ a b "HP-15C: DM-15". Hp-15c.homepage.t-online.de. Retrieved 2017-12-10. 
  18. ^ "SwissMicros.com". Retrieved 2013-06-29. 
  19. ^ a b http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/archv021.cgi?read=248849
  20. ^ https://www.swissmicros.com/manuals/swissmicros_serial_guide_v1.63.pdf

Further reading[edit]

External links[edit]