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<!DOCTYPE html>
<title>Applesoft BASIC in JavaScript</title>
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<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge"> <!-- Suppress browser compat button -->
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<link rel="shortcut icon" href="favicon.ico">
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<link rel="alternate" type="application/atom+xml" href="https://github.com/inexorabletash/jsbasic/commits/master.atom">
<link rel="stylesheet" href="styles.css">
<link rel="stylesheet" href="display.css">
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<script src="https://cdn.rawgit.com/inexorabletash/polyfill/v0.1.29/polyfill.min.js"></script>
<script src="https://cdn.rawgit.com/inexorabletash/polyfill/v0.1.29/keyboard.js"></script>
<!-- CodeMirror syntax highlighting - this is optional -->
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<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.61.1/codemirror.min.js"></script>
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<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.61.1/codemirror.css">
<script src="cm/basic.js"></script>
<link rel="stylesheet" href="cm/basic.css">
<style>
.CodeMirror { border: solid 1px black; width: 598px; height: 384px; background-color: white; }
.CodeMirror-scroll { height: 100%; }
</style>
<h1>Applesoft BASIC in Javascript</h1>
<p>
By <a target=_blank href="mailto:inexorabletash@gmail.com">Joshua Bell</a>
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| <a target="_blank" href="https://github.com/inexorabletash/jsbasic/">Source</a>
| <a target="_blank" href="https://github.com/inexorabletash/jsbasic/blob/master/README.md">README</a>
&mdash; <a target="_blank" href="reference.html">Applesoft BASIC Quick Reference</a>
<p>Related projects:
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<a href="https://inexorabletash.github.io/jslogo/">Logo in Javascript</a>
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| <a href="https://a2stuff.github.io/vnIIc">Streaming video to an Apple II - vnIIc</a>
</p>
<br style="clear: both;">
<!-- Screen -->
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<div id="frame" class="jsb-frame" style="float: left; margin: 5px;" tabIndex="0">
<div id="screen-wrapper" class="jsb-wrapper">
<div id="lores" class="jsb-lores"></div>
<canvas id="hires" width="560" height="384" class="jsb-hires"></canvas>
<canvas id="hires2" width="560" height="384" class="jsb-hires"></canvas>
<div id="screen" class="jsb-tty"></div>
</div>
</div>
<!-- Source -->
<div style="float: left; margin: 5px;">
Enter code: &nbsp;&nbsp;
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<button id="btn_run">&#x25B6; Run</button>
<button id="btn_stop" disabled>&#x25FC; Stop</button>
<select id="lb_files">
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<option disabled selected="selected">Select a sample...</option>
</select>
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<script>
fetch('samples/index.txt')
.then(response => {
if (!response.ok)
throw new Error(response.statusText);
return response.text();
})
.then(text => {
const select = document.querySelector('#lb_files');
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let group;
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text.split(/\r?\n/g).forEach(line => {
line = line.replace(/^\s+|\s+$/, '');
if (!line.length) return;
if (line.startsWith('#')) {
line = line.replace(/^#\s+/, '');
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if (line.startsWith('___')) {
select.appendChild(document.createElement('hr'));
} else {
group = Object.assign(document.createElement('optgroup'),
{label: line});
select.appendChild(group);
}
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} else {
const match = line.match(/^(\S+)\s+(.*)$/);
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group.appendChild(Object.assign(
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document.createElement('option'),
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{value: match[1], innerText: match[2]}));
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}
});
});
</script>
<!-- Source code editor inserted here -->
<div id="editorframe"></div>
<form id="submission" method="post" enctype="text/plain" action="mailto:inexorabletash@gmail.com?subject=Applesoft%20Sample%20Submission" target=_blank>
<textarea name="source" id="source" style="display: none;">
</textarea>
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<button id="btn_save" title="Save as a file">&#x1F4BE; Save</button>
<button id="btn_load" title="Load a file">&#x1F4C2; Load</button>
<button id="btn_share" title="Share by email">&#x1F4E9; Share</button>
<button id="show_paper" title="Echo all output to a &quot;print-out&quot;, so you can copy/paste">&#x1F4C3; Show output</button>
<button id="hide_paper" title="Hide the &quot;print-out&quot;">&#x1F6AB; Hide output</button>
</form>
</div>
<br style="clear: both;">
<h3 id="links">Links</h3>
<ul>
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<li>
Real emulators in JavaScript:
<a target="_blank" href="http://www.scullinsteel.com/apple2/">Apple IIjs</a>,
<a target="_blank" href="http://www.scullinsteel.com/apple//e">Apple //jse</a>,
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<a target="_blank" href="http://www.megidish.net/apple2js/index.html">Apple2JS</a>,
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and
<a target="_blank" href="https://github.com/nicholasbs/appletoo">many</a>
<a target="_blank" href="http://porkrind.org/a2/">more</a>
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<li><a target="_blank" href="http://www.6502asm.com/">6502asm.com</a> - a 6502 assembler/emulator in JavaScript
<li><a target="_blank" href="http://www.quitebasic.com/">Quite BASIC</a> - a similar project aimed at teaching programming
</ul>
<div id="paper-spacer"></div>
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<div id="paper"></div>
<script src="basic.js?2012-02-08"></script>
<script src="bell.js"></script>
<script src="tty.js"></script>
<script src="lores.js"></script>
<script src="hires.js"></script>
<script src="dos.js"></script>
<script src="printer.js"></script>
<script src="index.js"></script>