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HP-15C

April 14, 2024

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

HP-15C
HP-15C
TypeProgrammable scientific
ManufacturerHewlett-Packard
Introduced1982
Discontinued1989
CostUSD 135 (Original) USD 99.99 – USD 179.99 (15C LE)
Calculator
Entry modeRPN
Display typeLCD seven-segment display
Display size10 digits
CPU
ProcessorHP Nut core (1LF5 / 1LM2 / 1LQ9[1]) / ARM7TDMI core (Atmel AT91SAM7L128) (15C LE)
Programming
Programming language(s)Keystroke programmable (fully merged)
Memory register2…66 registers (R0…R9, R.0/R10…R.9/R20, R21…R65) plus RI, X, Y, Z, T, LAST X
Program steps0…448 lines
Other
Power consumption0.25 mW
Weight113 g
Dimensions128 × 79 × 15 mm

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 15C used bulk CMOS technology for its processor, resulting in very low power consumption.

 
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. The power consumption of the processor is greater than that of the original HP-15C, as HP did not use the same technology in any of the future models.

HP 15C Collector’s Edition edit

In May 2023, a HP 15C Collector's Edition was announced[8] and was released in July 2023 by the HP Development Company, L.P.'s licensees Moravia Consulting spol. s r.o. and Royal Consumer Information Products, Inc.[9][10] The calculator is manufactured in the Philippines. It supports up to 672 steps for programs and up to 99 registers. The initial firmware incorporates fixes for the known bugs from previous models (as shown below) and others;[11] it is emulated on the same CPU[12] as the 2015 and 2022 variants of the HP-12C, the Microchip ATSAM4LC2CA (ARM Cortex-M4).[13] The calculator is also powered by two CR2032 batteries.

The test menu (Off, g+↵ Enter+ON) officially offers three choices. A fourth choice (4) is undocumented and permits to enter two hidden modes: "15.2" (more memory, but with some limitations like 8×8 inversion matrices and three-digit step number display) and "16" (emulating a HP-16C).

Bugs and problems edit

HP-15C:

  • CHS stack lift bug (and fix)
  • The non-responsive reset procedure documented in the 15C manual had the side effect of rotating the X register by 22 bits which could then be used to perform synthetic programming.[14][15]

HP-15C Limited Edition:[16]

  • One of the more significant bugs in the released firmware version (dated 2011-04-15 in the self-test) is that PSE only works once in a program and subsequently blanks the display until the program stops or is stopped. Downgrading the firmware resolves the PSE bug,[17] however, other bugs will also be reintroduced.
  • The original HP-15C self-test keystrokes do not work with the HP-15C LE and can corrupt memory contents. Although a new functional self-test procedure was added, the original manual did not document it.[18]

HP-15C Collector's Edition:

  • No known bugs in the officially supported "15" mode yet; the bugs above and others have been fixed in the firmware, or in the case of the non-functional self-test procedure, instructions to switch to the new self-test are included in the accompanying documentation.[11] There are a number of bugs and shortcomings in the undocumented "15.2" and "16" modes,[19] most of which were fixed by a community member by October 2023.[20][21]

Legacy edit

Emulators edit

An official PC emulator for the 15C is available as freeware from Hewlett-Packard.[22][23] Another version is commercially available for Android[24] and iOS[25] devices.

Clones edit

 
The company SwissMicros builds the DM-15C as an HP-15C clone in the size of a credit card (shown), alongside a further model with size and shape close to the original.

On 6 February 2012,[26] SwissMicros (previously known as RPN-Calc) introduced a miniature clone named DM-15CC approximating the size of an 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 129 or even 230 registers and up to 1603 or 896 programs steps.[27][28][29][30] A DM15 Silver Edition in a titanium case is available as well in three color variants (metal, brown, blue).[31] 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,[32] they come with a USB (Mini-B)[32] serial interface to exchange data with a PC etc. for backup purposes and possibly to communicate with applications (like PC-based HP-15C emulators)[30] 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. Powering via USB is not supported.

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. ^ Kuperus, Klaas (2023-05-02). "New: HP 15C Collectors Edition". from the original on 2023-08-09. Retrieved 2023-08-10.
  9. ^ "HP Calculator Division". Retrieved 2023-07-05.
  10. ^ "Eduwinkel". Retrieved 2023-07-05.
  11. ^ a b "The Museum of HP Calculators, post from contributing developer". Retrieved 2023-08-03.
  12. ^ "The Museum of HP Calculators, vendor's post". Retrieved 2023-08-03.
  13. ^ "HP Voyager Calculator Variants". Brouhaha.com. Retrieved 2023-08-03.
  14. ^ Smith, Eric L. "Brouhaha" (2023-01-30) [2004]. "HP-15C Synthetics". from the original on 2023-09-25. Retrieved 2023-09-25.
  15. ^ "HP 15C Synthetics and Synthetic Programming". Retrieved 2022-08-10.
  16. ^ Wasserman, Katie (2011-12-26) [2011-09-16]. "HP-15C LE (Limited Edition) Bug Reports". from the original on 2017-12-20. Retrieved 2017-12-20.
  17. ^ HP 15C LE PSE / Pause Bug Fix, retrieved 2022-08-05
  18. ^ HP 15C Limited Edition LE Scientific Calculator Self-tests, retrieved 2022-08-05
  19. ^ https://www.hpmuseum.org/forum/thread-19886-page-16.html
  20. ^ https://www.hpmuseum.org/forum/thread-19886-post-179437.html#pid179437
  21. ^ https://www.hpmuseum.org/forum/thread-19458.html
  22. ^ (in French). 2014. Archived from the original on 2017-09-17. Retrieved 2017-09-17.
  23. ^ . Hewlett-Packard. 2012-11-29. Archived from the original on 2016-06-08. Retrieved 2017-09-17.
  24. ^ "Hewlett-Packard ships official HP 15c app for Android - Hacker News". news.ycombinator.com. Retrieved 2017-12-10.
  25. ^ "HP reincarnates calculators on iPhone, Windows". Cnet.com. Retrieved 2017-12-10.
  26. ^ "HP Forum Archive 20 Message Index". www.hpmuseum.org.
  27. ^ "Firmware V29 for DM1x/DM41(L) units - www.SwissMicros.com". forum.swissmicros.com.
  28. ^ "DM-15CC Extended Memory". www.hpmuseum.org.
  29. ^ "DM-15". gtello.pagesperso-orange.fr.
  30. ^ a b "HP-15C: DM-15". Hp-15c.homepage.t-online.de. Retrieved 2017-12-10.
  31. ^ "SwissMicros.com". Retrieved 2013-06-29.
  32. ^ a b "HP Forum Archive 21 Message Index". www.hpmuseum.org.

Further reading edit

  • Hewlett-Packard HP-15C Owner's Handbook (PDF). 2.4. Hewlett-Packard Development Company, LP. September 2011. 00015-90001. (PDF) from the original on 2017-09-17. Retrieved 2015-12-05.
  • Hewlett-Packard HP-15C Advanced Functions Handbook (PDF). Hewlett-Packard Company, Corvallis Division. August 1982. 00015-90011. (PDF) from the original on 2017-09-17. Retrieved 2015-12-05.
  • Hewlett-Packard HP-15C Advanced Functions Handbook (PDF). Hewlett-Packard Development Company, LP. 2012 [1982]. 00015-90011. (PDF) from the original on 2017-09-17. Retrieved 2015-12-05.
  • HP 15c Collector's Edition - Scientific Calculator - Owner's Handbook (PDF) (3 ed.). MORAVIA Consulting spol. s r.o. February 2023. (PDF) from the original on 2023-08-10. Retrieved 2023-08-10. (1+xi+293+2+1 pages)
  • HP 15c Collector's Edition - Scientific Calculator - Advanced Functions Handbook (PDF) (3 ed.). MORAVIA Consulting spol. s r.o. July 2023. (PDF) from the original on 2023-08-11. Retrieved 2023-08-11. (2+2+222+2 pages)
  • Markstein, Howard W. (March 1982). "A look inside Hewlett-Packard's HP-11C". Electronic Packaging and Production Magazine. from the original on 2017-09-17. Retrieved 2023-08-12.
  • Evett, Eric A.; McClellan, Paul J.; Tanzini, Joseph "Joe" P. (May 1983). "Scientific Pocket Calculator Extends Range of Built-in Functions Matrix operations, complex number functions, integration, and equation solving are only some of the numerous preprogrammed capabilities of HP's latest scientific calculator, the HP-15C" (PDF). Hewlett-Packard Journal. 34 (5). Palo Alto, California, USA: Hewlett-Packard Company: 25–35. ISSN 0018-1153. (PDF) from the original on 2023-09-21. Retrieved 2023-09-21. (11 pages)

External links edit

  • Hicks, David G. "HP 10C Series Technology and Packaging". Museum of HP Calculators.
  • Smith, Eric. "Hewlett-Packard Calculators".
  • "HP-15C".

April 14, 2024
high, scientific, programmable, calculator, hewlett, packard, voyager, series, produced, between, 1982, 1989, typeprogrammable, scientificmanufacturerhewlett, packardintroduced1982discontinued1989costusd, original, calculatorentry, moderpndisplay, typelcd, sev. The HP 15C is a high end scientific programmable calculator of Hewlett Packard s Voyager series produced between 1982 and 1989 HP 15CHP 15CTypeProgrammable scientificManufacturerHewlett PackardIntroduced1982Discontinued1989CostUSD 135 Original USD 99 99 USD 179 99 15C LE CalculatorEntry modeRPNDisplay typeLCD seven segment displayDisplay size10 digitsCPUProcessorHP Nut core 1LF5 1LM2 1LQ9 1 ARM7TDMI core Atmel AT91SAM7L128 15C LE ProgrammingProgramming language s Keystroke programmable fully merged Memory register2 66 registers R0 R9 R 0 R10 R 9 R20 R21 R65 plus RI X Y Z T LAST XProgram steps0 448 linesOtherPower consumption0 25 mWWeight113 gDimensions128 79 15 mm Contents 1 Models 1 1 HP 15C 1 2 HP 15C Limited Edition 1 3 HP 15C Collector s Edition 2 Bugs and problems 3 Legacy 3 1 Emulators 3 2 Clones 4 See also 5 References 6 Further reading 7 External linksModels editHP 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 15C used bulk CMOS technology for its processor resulting in very low power consumption nbsp The Hewlett Packard 15C from the 1980s nbsp The rear side of a Hewlett Packard 15CHP 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 Brebisson 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 The power consumption of the processor is greater than that of the original HP 15C as HP did not use the same technology in any of the future models HP 15C Collector s Edition edit In May 2023 a HP 15C Collector s Edition was announced 8 and was released in July 2023 by the HP Development Company L P s licensees Moravia Consulting spol s r o and Royal Consumer Information Products Inc 9 10 The calculator is manufactured in the Philippines It supports up to 672 steps for programs and up to 99 registers The initial firmware incorporates fixes for the known bugs from previous models as shown below and others 11 it is emulated on the same CPU 12 as the 2015 and 2022 variants of the HP 12C the Microchip ATSAM4LC2CA ARM Cortex M4 13 The calculator is also powered by two CR2032 batteries The test menu Off g Enter ON officially offers three choices A fourth choice 4 is undocumented and permits to enter two hidden modes 15 2 more memory but with some limitations like 8 8 inversion matrices and three digit step number display and 16 emulating a HP 16C Bugs and problems editHP 15C CHS stack lift bug and fix The non responsive reset procedure documented in the 15C manual had the side effect of rotating the X register by 22 bits which could then be used to perform synthetic programming 14 15 HP 15C Limited Edition 16 One of the more significant bugs in the released firmware version dated 2011 04 15 in the self test is that PSE only works once in a program and subsequently blanks the display until the program stops or is stopped Downgrading the firmware resolves the PSE bug 17 however other bugs will also be reintroduced The original HP 15C self test keystrokes do not work with the HP 15C LE and can corrupt memory contents Although a new functional self test procedure was added the original manual did not document it 18 HP 15C Collector s Edition No known bugs in the officially supported 15 mode yet the bugs above and others have been fixed in the firmware or in the case of the non functional self test procedure instructions to switch to the new self test are included in the accompanying documentation 11 There are a number of bugs and shortcomings in the undocumented 15 2 and 16 modes 19 most of which were fixed by a community member by October 2023 20 21 Legacy editEmulators edit An official PC emulator for the 15C is available as freeware from Hewlett Packard 22 23 Another version is commercially available for Android 24 and iOS 25 devices Clones edit nbsp The company SwissMicros builds the DM 15C as an HP 15C clone in the size of a credit card shown alongside a further model with size and shape close to the original On 6 February 2012 26 SwissMicros previously known as RPN Calc introduced a miniature clone named DM 15CC approximating the size of an 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 129 or even 230 registers and up to 1603 or 896 programs steps 27 28 29 30 A DM15 Silver Edition in a titanium case is available as well in three color variants metal brown blue 31 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 32 they come with a USB Mini B 32 serial interface to exchange data with a PC etc for backup purposes and possibly to communicate with applications like PC based HP 15C emulators 30 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 Powering via USB is not supported See also editList of Hewlett Packard products Pocket calculators HP calculatorsReferences edit HP Voyager Calculator Variants Brouhaha com Retrieved 2017 12 10 HP 15C Prototype Hpmuseum org Retrieved 2017 12 10 Filter News Results HP Newsroom HP Press Releases Hp com Retrieved 2017 12 10 HP 15C Limited Edition Finetune co jp Retrieved 2017 12 10 Product End of Life EOL Notification PDF Media digikey com Retrieved 2017 12 10 Product End of Life EOL Notification PDF Media digikey com Retrieved 2017 12 10 Product End of Life EOL Notification PDF Media digikey com Retrieved 2017 12 10 Kuperus Klaas 2023 05 02 New HP 15C Collectors Edition Archived from the original on 2023 08 09 Retrieved 2023 08 10 HP Calculator Division Retrieved 2023 07 05 Eduwinkel Retrieved 2023 07 05 a b The Museum of HP Calculators post from contributing developer Retrieved 2023 08 03 The Museum of HP Calculators vendor s post Retrieved 2023 08 03 HP Voyager Calculator Variants Brouhaha com Retrieved 2023 08 03 Smith Eric L Brouhaha 2023 01 30 2004 HP 15C Synthetics Archived from the original on 2023 09 25 Retrieved 2023 09 25 HP 15C Synthetics and Synthetic Programming Retrieved 2022 08 10 Wasserman Katie 2011 12 26 2011 09 16 HP 15C LE Limited Edition Bug Reports Archived from the original on 2017 12 20 Retrieved 2017 12 20 HP 15C LE PSE Pause Bug Fix retrieved 2022 08 05 HP 15C Limited Edition LE Scientific Calculator Self tests retrieved 2022 08 05 https www hpmuseum org forum thread 19886 page 16 html https www hpmuseum org forum thread 19886 post 179437 html pid179437 https www hpmuseum org forum thread 19458 html Emulateurs in French 2014 Archived from the original on 2017 09 17 Retrieved 2017 09 17 HP 15C Virtual Calculator Hewlett Packard 2012 11 29 Archived from the original on 2016 06 08 Retrieved 2017 09 17 Hewlett Packard ships official HP 15c app for Android Hacker News news ycombinator com Retrieved 2017 12 10 HP reincarnates calculators on iPhone Windows Cnet com Retrieved 2017 12 10 HP Forum Archive 20 Message Index www hpmuseum org Firmware V29 for DM1x DM41 L units www SwissMicros com forum swissmicros com DM 15CC Extended Memory www hpmuseum org DM 15 gtello pagesperso orange fr a b HP 15C DM 15 Hp 15c homepage t online de Retrieved 2017 12 10 SwissMicros com Retrieved 2013 06 29 a b HP Forum Archive 21 Message Index www hpmuseum org Further reading editHewlett Packard HP 15C Owner s Handbook PDF 2 4 Hewlett Packard Development Company LP September 2011 00015 90001 Archived PDF from the original on 2017 09 17 Retrieved 2015 12 05 Hewlett Packard HP 15C Advanced Functions Handbook PDF Hewlett Packard Company Corvallis Division August 1982 00015 90011 Archived PDF from the original on 2017 09 17 Retrieved 2015 12 05 Hewlett Packard HP 15C Advanced Functions Handbook PDF Hewlett Packard Development Company LP 2012 1982 00015 90011 Archived PDF from the original on 2017 09 17 Retrieved 2015 12 05 HP 15c Collector s Edition Scientific Calculator Owner s Handbook PDF 3 ed MORAVIA Consulting spol s r o February 2023 Archived PDF from the original on 2023 08 10 Retrieved 2023 08 10 1 xi 293 2 1 pages HP 15c Collector s Edition Scientific Calculator Advanced Functions Handbook PDF 3 ed MORAVIA Consulting spol s r o July 2023 Archived PDF from the original on 2023 08 11 Retrieved 2023 08 11 2 2 222 2 pages Markstein Howard W March 1982 A look inside Hewlett Packard s HP 11C Electronic Packaging and Production Magazine Archived from the original on 2017 09 17 Retrieved 2023 08 12 Evett Eric A McClellan Paul J Tanzini Joseph Joe P May 1983 Scientific Pocket Calculator Extends Range of Built in Functions Matrix operations complex number functions integration and equation solving are only some of the numerous preprogrammed capabilities of HP s latest scientific calculator the HP 15C PDF Hewlett Packard Journal 34 5 Palo Alto California USA Hewlett Packard Company 25 35 ISSN 0018 1153 Archived PDF from the original on 2023 09 21 Retrieved 2023 09 21 11 pages External links editHicks David G HP 10C Series Technology and Packaging Museum of HP Calculators Smith Eric Hewlett Packard Calculators HP 15C Retrieved from https en wikipedia org w index php title HP 15C amp oldid 1216487199 15CCE, wikipedia, wiki, book, books, library,

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