12 lines
2.6 KiB
HTML
12 lines
2.6 KiB
HTML
<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
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<html xmlns="http://www.w3.org/1999/xhtml"><head><title>BLT</title><link rel="stylesheet" href="../../jargon.css" type="text/css"/><meta name="generator" content="DocBook XSL Stylesheets V1.61.0"/><link rel="home" href="../index.html" title="The Jargon File"/><link rel="up" href="../B.html" title="B"/><link rel="previous" href="blow-up.html" title="blow up"/><link rel="next" href="blue-box.html" title="blue box"/></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">BLT</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="blow-up.html">Prev</a> </td><th width="60%" align="center">B</th><td width="20%" align="right"> <a accesskey="n" href="blue-box.html">Next</a></td></tr></table><hr/></div><dt><a id="BLT"/><dt xmlns="" id="BLT"><b>BLT</b>: <span xmlns="http://www.w3.org/1999/xhtml" class="pronunciation">/B·L·T/</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="pronunciation">/bl@t/</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="pronunciation">/belt/</span>, <span xmlns="http://www.w3.org/1999/xhtml" class="grammar">n.,vt.</span></dt></dt><dd><p> Synonym for <a href="blit.html"><i class="glossterm">blit</i></a>. This is the original form
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of <a href="blit.html"><i class="glossterm">blit</i></a> and the ancestor of
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<a href="bitblt.html"><i class="glossterm">bitblt</i></a>. It referred to any large bit-field copy or
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move operation (one resource-intensive memory-shuffling operation done on
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pre-paged versions of ITS, WAITS, and TOPS-10 was sardonically referred to
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as “<span class="quote">The Big BLT</span>”). The jargon usage has outlasted the
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<a href="../P/PDP-10.html"><i class="glossterm">PDP-10</i></a> BLock Transfer instruction from which
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<a href="BLT.html"><i class="glossterm">BLT</i></a> derives; nowadays, the assembler mnemonic
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<a href="BLT.html"><i class="glossterm">BLT</i></a> almost always means “<span class="quote">Branch if Less Than
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zero</span>”.</p></dd><div class="navfooter"><hr/><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="blow-up.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="../B.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="blue-box.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">blow up </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> blue box</td></tr></table></div></body></html>
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