.jpg) HP-15C | |
| Type | Programmablescientific |
|---|---|
| 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 | LCDseven-segment display |
| Display size | 10 digits |
| CPU | |
| Processor | HP Nut core (1LF5 / 1LM2 / 1LQ9[1]) /ARM7TDMI core (AtmelAT91SAM7L128) (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 |
TheHP-15C is a high-end scientificprogrammable calculator ofHewlett-Packard'sVoyager series produced between 1982 and 1989. The "C" in the name refers to thecontinuous memory, such that the calculator retains its state when switched off.
The HP-15C is a high-end scientificpocket calculator with a root-solver and numerical integration. A member ofHewlett-PackardVoyager series ofprogrammable 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 theHP-34C. The 15C usedbulk CMOS technology for its processor, resulting in very low power consumption.
After showing a prototype labelledHP 15c+[2] at the HHC 2010, HP announced theHP 15C Limited Edition (NW250AA) on 1 September 2011. It is based on a flashable controller utilizing the sameARM7TDMI core already used in the 2008 revision of the12C but in a different package,[3] anAtmelAT91SAM7L128-AU[4][5][6][7] running an emulator written byCyrille de Brébisson to execute the oldHP Nut code much faster than on the original hardware. The calculator was released alongside theHP 12c 30th Anniversary Edition. This model is powered by twoCR2032 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.
In May 2023, a HP 15C Collector's Edition was announced[8] and was released in July 2023 by theHP Development Company, L.P.'s licenseesMoravia Consulting spol. s r.o. andRoyal 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) isundocumented 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 aHP-16C).
Unlike the earlier editions, the Collectors Edition does not have the "Hewlett-Packard" text along the bottom left of the panel and is a slightly darker shade of brown than the original.
HP-15C:
HP-15C Limited Edition:[16]
HP-15C Collector's Edition:
An official PC emulator for the 15C is available as freeware from Hewlett-Packard.[24][25]
There are manycalculators simulating software, imitating various HP calculators.[26][27][28]
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