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about.html
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<html>
<head>
<title>Free 15C RPN Scientific Calculator</title>
<link href="style.css" rel="stylesheet" type="text/css">
</head>
<body>
<h1>Free 15C RPN Scientific Calculator</h1>
<div id="navbar"><ul><li><a href="/">Home</a></li><li><a href="about.html">About</a></li><li><a href="links.html">Links</a></li><li><a href="http://github.com/ghewgill/hp15c">Source</a></div>
<p>
This is a simulator for the <a href="http://www.hpmuseum.org/hp15.htm">HP-15C</a> advanced scientific programmable calculator.
This simulator aims to include all features of the HP-15C including:
</p>
<ul>
<li>Complex arithmetic
<li>Matrix math
<li>Numerical integration
<li>Numeric equation solver
<li>Programmability
<li>Statistics functions
</ul>
<p>
This simulator has been developed independently and does not rely on any actual HP-15C code or ROM images.
</p>
<h2>History</h2>
<p>
I bought my HP-15C in 1987 as my first RPN calculator, and used it throughout university.
I still have my original one, and it continues to operate on the <em>same</em> set of batteries, after 25 years.
The form factor (horizontal layout) is the distinctive feature of this family of calculators.
There is even a <a href="http://hp15c.org">Petition to Bring Back the 15C</a>.
</p>
<p>
This implementation was inspired by the <a href="http://www.hpmuseum.org/simulate/hp35sim/hp35sim.htm">HP-35 Calculator Simulator</a> at the Museum of HP Calculators.
</p>
<h2>Known Issues</h2>
<p>
The following functions are known to be incomplete or nonfunctional:
</p>
<ul>
<li>Some rounding errors in functions like ->H.MS
<li>Numeric range checking
<li>PSE function in a program doesn't actually pause
<li>Indirect matrix access through I register
</ul>
<h2>Author</h2>
<p>This HP15c simulator was developed by <a href="http://hewgill.com">Greg Hewgill</a>.
<address>
Greg Hewgill <a href="mailto:[email protected]"><[email protected]></a>
</address>
</body>
</html>