shithub: rgbds

ref: 6c1dd85c9a742589d2142be72257a7380a4786dd
dir: /doc/asm/equs.htm/

View raw version
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<HTML>
<HEAD>
	<TITLE>xAsm EQUS</TITLE>
        <link rel="stylesheet" type="text/css" href="../style.css">
</HEAD>

<BODY>
<I><H2>EQUS</H2></I><HR>

<P>EQUS is used to define string-symbols. Wherever the assembler meets a string symbol its name is replaced with its value. If you are familiar with C you can think of it as the same as #define.<BR>
<BR>
<TABLE BORDER=0 BGCOLOR="Black" CELLPADDING=8 WIDTH="50%">
<TR>
	<TD><FONT COLOR="#00FF00">
<PRE>COUNTREG EQUS "[hl+]"
          
         ld   a,COUNTREG</PRE>     
</FONT></TD>
</TR>
</TABLE>
<P>     (Note that : following the label-name is not allowed.)<BR>
<P>This will be interpreted as:<BR>
<TABLE BORDER=0 BGCOLOR="Black" CELLPADDING=8 WIDTH="50%">
<TR>
	<TD><FONT COLOR="#00FF00">
<PRE>         ld   a,[hl+]</PRE>   
</FONT></TD>
</TR>
</TABLE>
<P>String-symbols  can also be used to define  small  one-line macros:<BR>
<TABLE BORDER=0 BGCOLOR="Black" CELLPADDING=8 WIDTH="50%">
<TR>
	<TD><FONT COLOR="#00FF00">
<PRE>PUSHA    EQUS "push af\npush bc\npush de\npush hl\n"</PRE>   
</FONT></TD>
</TR>
</TABLE>
<P>Note that a colon (:) following the label-name is not allowed. String equates can't be exported or imported.<BR>

<H3>See also:</H3>
<UL>
	<LI><A HREF="expr_str.htm">String expressions, functions and formatting</A>
</UL>

<BR><HR>
<FONT SIZE="-1"><I><P ALIGN=RIGHT>Last updated 21 June 1997 by <A HREF="mailto:[email protected]">Carsten Sorensen</A></P></I></FONT>