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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><!-- Macro Processing --><HTML><HEAD><TITLE>Macro Processing</TITLE></HEAD><BODY BACKGROUND="spiral.gif" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#990099" ALINK="#FF0000"><TABLE WIDTH="98%"><TR><TD WIDTH=60 VALIGN=BOTTOM NOWRAP><IMG SRC="transp.gif" ALT="" WIDTH=60 HEIGHT=20></TD><TD><!-- Ab hier Seitentext: --><BIG><BR><P><STRONG><U>III.11 Macro Processing</U></STRONG></P><P>Macros allow to combine basic assembler instructions to "super commands".For this, macros are defined as blocks of code, which can be used in aprogram, wherever it is desired.<BR>However, an advanced macro design with parameters, local symbols and macrooperators, combined with conditional assembly, goes far beyond this basicfunctionality!<BR>With only five keywords (MACRO, REPT, ENDM, EXITM, LOCAL) and some controlcharacters the <NOBR>ASEM-51</NOBR> macro processor provides a variety of powerfultools. These five meta instructions are not part of the Intel <NOBR>MCS-51</NOBR>assembly language, but overlay it, as already known from conditional assembly.<BR>There are two sorts of macros: callable macros and repeat blocks.</P><P><OL TYPE=1><LI><A HREF="simple.htm">Simple Callable Macros</A></LI><LI><A HREF="params.htm">Macro Parameters</A></LI><LI><A HREF="repeat.htm">Repeat Macros</A></LI><LI><A HREF="local.htm">Local Symbols</A></LI><LI><A HREF="operator.htm">Macro Operators</A></LI><LI><A HREF="exitm.htm">Premature End of a Macro Expansion</A></LI><LI><A HREF="nestcall.htm">Nested and Recursive Macro Calls</A></LI><LI><A HREF="nestdefs.htm">Nested Macro Definitions</A></LI><LI><A HREF="macrolst.htm">Representation in the List File</A></LI></OL></P></BIG><!-- Seitentext Ende --><P><BR><BR><CENTER><TABLE WIDTH="70%"><TR><TH><A HREF="contents.htm"><IMG SRC="home.gif" ALT="[contents]" BORDER=0 WIDTH=32 HEIGHT=32></A></TH> <TH><A HREF="language.htm"><IMG SRC="up.gif" ALT="[up]" BORDER=0 WIDTH=32 HEIGHT=32></A></TH> <TH><A HREF="ifxxcon.htm"><IMG SRC="back.gif" ALT="[back]" BORDER=0 WIDTH=32 HEIGHT=32></A></TH> <TH><A HREF="simple.htm"><IMG SRC="next.gif" ALT="[next]" BORDER=0 WIDTH=32 HEIGHT=32></A></TH></TR></TABLE></CENTER></P></TD></TR></TABLE></BODY></HTML>⌨️ 快捷键说明
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