1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2<html> 3<!-- This file documents the GNU Assembler "as". 4 5Copyright (C) 1991-2021 Free Software Foundation, Inc. 6 7Permission is granted to copy, distribute and/or modify this document 8under the terms of the GNU Free Documentation License, Version 1.3 9or any later version published by the Free Software Foundation; 10with no Invariant Sections, with no Front-Cover Texts, and with no 11Back-Cover Texts. A copy of the license is included in the 12section entitled "GNU Free Documentation License". 13 --> 14<!-- Created by GNU Texinfo 5.1, http://www.gnu.org/software/texinfo/ --> 15<head> 16<title>Using as: Z80 Syntax</title> 17 18<meta name="description" content="Using as: Z80 Syntax"> 19<meta name="keywords" content="Using as: Z80 Syntax"> 20<meta name="resource-type" content="document"> 21<meta name="distribution" content="global"> 22<meta name="Generator" content="makeinfo"> 23<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 24<link href="index.html#Top" rel="start" title="Top"> 25<link href="AS-Index.html#AS-Index" rel="index" title="AS Index"> 26<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> 27<link href="Z80_002dDependent.html#Z80_002dDependent" rel="up" title="Z80-Dependent"> 28<link href="Z80_002dChars.html#Z80_002dChars" rel="next" title="Z80-Chars"> 29<link href="Z80-Options.html#Z80-Options" rel="previous" title="Z80 Options"> 30<style type="text/css"> 31<!-- 32a.summary-letter {text-decoration: none} 33blockquote.smallquotation {font-size: smaller} 34div.display {margin-left: 3.2em} 35div.example {margin-left: 3.2em} 36div.indentedblock {margin-left: 3.2em} 37div.lisp {margin-left: 3.2em} 38div.smalldisplay {margin-left: 3.2em} 39div.smallexample {margin-left: 3.2em} 40div.smallindentedblock {margin-left: 3.2em; font-size: smaller} 41div.smalllisp {margin-left: 3.2em} 42kbd {font-style:oblique} 43pre.display {font-family: inherit} 44pre.format {font-family: inherit} 45pre.menu-comment {font-family: serif} 46pre.menu-preformatted {font-family: serif} 47pre.smalldisplay {font-family: inherit; font-size: smaller} 48pre.smallexample {font-size: smaller} 49pre.smallformat {font-family: inherit; font-size: smaller} 50pre.smalllisp {font-size: smaller} 51span.nocodebreak {white-space:nowrap} 52span.nolinebreak {white-space:nowrap} 53span.roman {font-family:serif; font-weight:normal} 54span.sansserif {font-family:sans-serif; font-weight:normal} 55ul.no-bullet {list-style: none} 56--> 57</style> 58 59 60</head> 61 62<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> 63<a name="Z80-Syntax"></a> 64<div class="header"> 65<p> 66Next: <a href="Z80-Floating-Point.html#Z80-Floating-Point" accesskey="n" rel="next">Z80 Floating Point</a>, Previous: <a href="Z80-Options.html#Z80-Options" accesskey="p" rel="previous">Z80 Options</a>, Up: <a href="Z80_002dDependent.html#Z80_002dDependent" accesskey="u" rel="up">Z80-Dependent</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="AS-Index.html#AS-Index" title="Index" rel="index">Index</a>]</p> 67</div> 68<hr> 69<a name="Syntax-35"></a> 70<h4 class="subsection">9.56.2 Syntax</h4> 71<p>The assembler syntax closely follows the ’Z80 family CPU User Manual’ by 72Zilog. 73In expressions a single ‘<samp>=</samp>’ may be used as “is equal to” 74comparison operator. 75</p> 76<p>Suffices can be used to indicate the radix of integer constants; 77‘<samp>H</samp>’ or ‘<samp>h</samp>’ for hexadecimal, ‘<samp>D</samp>’ or ‘<samp>d</samp>’ for decimal, 78‘<samp>Q</samp>’, ‘<samp>O</samp>’, ‘<samp>q</samp>’ or ‘<samp>o</samp>’ for octal, and ‘<samp>B</samp>’ for 79binary. 80</p> 81<p>The suffix ‘<samp>b</samp>’ denotes a backreference to local label. 82</p> 83<table class="menu" border="0" cellspacing="0"> 84<tr><td align="left" valign="top">• <a href="Z80_002dChars.html#Z80_002dChars" accesskey="1">Z80-Chars</a>:</td><td> </td><td align="left" valign="top">Special Characters 85</td></tr> 86<tr><td align="left" valign="top">• <a href="Z80_002dRegs.html#Z80_002dRegs" accesskey="2">Z80-Regs</a>:</td><td> </td><td align="left" valign="top">Register Names 87</td></tr> 88<tr><td align="left" valign="top">• <a href="Z80_002dCase.html#Z80_002dCase" accesskey="3">Z80-Case</a>:</td><td> </td><td align="left" valign="top">Case Sensitivity 89</td></tr> 90<tr><td align="left" valign="top">• <a href="Z80_002dLabels.html#Z80_002dLabels" accesskey="4">Z80-Labels</a>:</td><td> </td><td align="left" valign="top">Labels 91</td></tr> 92</table> 93 94 95 96 97</body> 98</html> 99