HP-45
The HP-45 is the second scientific pocket calculator introduced by Hewlett-Packard, adding to the features of the HP-35. It was introduced in 1973 with an MSRP of US$395. Especially noteworthy was its pioneering addition of a shift key that gave other keys alternate functions.
HP-45
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- HP-45
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The HP-45 is the second scientific pocket calculator introduced by Hewlett-Packard, adding to the features of the HP-35. It was introduced in 1973 with an MSRP of US$395. Especially noteworthy was its pioneering addition of a shift key that gave other keys alternate functions.
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In this article
Overview
Overview
The calculator was code-named Wizard, which is the first known use of a code name for a calculator. It also contained an Easter egg that allowed users to access a not-especially accurate stopwatch mode. An accurate version of the stopwatch mode was officially featured in the 1975 successor of the HP-45, the HP-55. The display of the HP-45 hidden timer showing 00 hours 00 minutes 07 seconds and 58/100 second. • HP-45 functions • Arithmetic — +, −, ×, ÷ • Trigonometry — sin, arc sin; cos, arc cos; tan, arc tan (decimal degrees, radians or grads). • Logarithms — log 10 x, 10 x; log e x, e x • Conversions — Decimal degrees, radians or grads ↔ degrees–min.–sec. Rectangular coordinates ↔ polar coordinates. Conversion units: cm/in, kg/lb, ltr/gal • Other — 1/x, √x, x 2, y x, n!, %, Δ%, vector arithmetic, register arithmetic. Statistical accumulation with mean and standard deviation calculations. Fixed point and scientific display modes, 0 – 9 decimal places round-off.
Key facts
Key facts
• Name — HP-45 • Type — Scientific • Entry — RPN • Introduced — 1973 • Discontinued — 1976 • Display Type — Red LED seven-segment display • Display Size — 15 digits (decimal point uses one digit), (±10 ±99) • Prog Lang — RPN key stroke • Memory Data — Four-register operational stack with nine addressable memory registers + LASTx register • Supply — Internal rechargeable battery or 115/230 V AC, 5 W • Weight — Calculator: 9 oz, recharger: 5 oz • Dimensions — Length: 5.8 in, width: 3.2 in, height: 0.7 –
Emulators
Emulators
Several individuals and companies make software emulators of the HP 45 series calculators. • Nonpareil, high-fidelity simulator for calculators: Emulates, among other, the HP-45. Licensed under the GNU General Public License (GPL). Available for Microsoft Windows. • HP-45 Emulator: HP-45 Emulator written in Java. Licensed under the GPL 3. Available for Android and Symbian. •: An Emulator for Windows Phone 7. • HP-45 Emulator in JavaScript: The HP-45 Program ROM was translated to JavaScript to have an exact simulation of the original calculator for use in web browsers. • HP-45 Emulator in Python: Simulates the HP-45 and displays and explains its inner workings. For Linux, MacOS, Windows, CP/M, and more, with minimal mode for low-power machines.
Patents
Patents
The complete design of the calculator and its firmware is patented under.
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Citations
References
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