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<!-- Copyright (C) 2003 Red Hat, Inc. --> <!-- This material may be distributed only subject to the terms --> <!-- and conditions set forth in the Open Publication License, v1.0 --> <!-- or later (the latest version is presently available at --> <!-- http://www.opencontent.org/openpub/). --> <!-- Distribution of the work or derivative of the work in any --> <!-- standard (paper) book form is prohibited unless prior --> <!-- permission is obtained from the copyright holder. --> <HTML ><HEAD ><TITLE >mcmp</TITLE ><meta name="MSSmartTagsPreventParsing" content="TRUE"> <META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ "><LINK REL="HOME" TITLE="eCos Reference Manual" HREF="ecos-ref.html"><LINK REL="UP" TITLE="Common Commands" HREF="common-commands.html"><LINK REL="PREVIOUS" TITLE="load" HREF="download-command.html"><LINK REL="NEXT" TITLE="mfill" HREF="mfill-command.html"></HEAD ><BODY CLASS="REFENTRY" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >eCos Reference Manual</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="download-command.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="mfill-command.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="MCMP-COMMAND">mcmp</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN3581" ></A ><H2 >Name</H2 >mcmp -- Compare two segments of memory</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN3584"><H2 >Synopsis</H2 ><P ><B CLASS="COMMAND" >mcmp</B > {-s <TT CLASS="REPLACEABLE" ><I >location1</I ></TT >} {-d <TT CLASS="REPLACEABLE" ><I >location1</I ></TT >} {-l <TT CLASS="REPLACEABLE" ><I >length</I ></TT >} [-1 | -2 | -4]</P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN3597" ></A ><H2 >Arguments</H2 ><DIV CLASS="INFORMALTABLE" ><A NAME="AEN3599"><P ></P ><TABLE BORDER="1" CLASS="CALSTABLE" ><THEAD ><TR ><TH WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >Name</TH ><TH WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >Type</TH ><TH WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >Description</TH ><TH WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >Default</TH ></TR ></THEAD ><TBODY ><TR ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >-s <TT CLASS="REPLACEABLE" ><I >location1</I ></TT ></TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >Memory address</TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >Location for start of data.</TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" ><SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >none</I ></SPAN ></TD ></TR ><TR ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >-d <TT CLASS="REPLACEABLE" ><I >location2</I ></TT ></TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >Memory address</TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >Location for start of data.</TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" ><SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >none</I ></SPAN ></TD ></TR ><TR ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >-l <TT CLASS="REPLACEABLE" ><I >length</I ></TT ></TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >Number</TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >Length of data</TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" ><SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >none</I ></SPAN ></TD ></TR ><TR ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >-1</TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" > </TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >Access one byte (8 bits) at a time. Only the least significant 8 bits of the pattern will be used.</TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >-4</TD ></TR ><TR ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >-2</TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" > </TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >Access two bytes (16 bits) at a time. Only the least significant 16 bits of the pattern will be used.</TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >-4</TD ></TR ><TR ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >-4</TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" > </TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >Access one word (32 bits) at a time.</TD ><TD WIDTH="25%" ALIGN="LEFT" VALIGN="TOP" >-4</TD ></TR ></TBODY ></TABLE ><P ></P ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN3648" ></A ><H2 >Description</H2 ><P >Compares the contents of two ranges of memory (RAM, ROM, FLASH, etc).</P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN3651" ></A ><H2 >Examples</H2 ><P >Compare two buffers which match (result is <SPAN CLASS="emphasis" ><I CLASS="EMPHASIS" >quiet</I ></SPAN >). <TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="SCREEN" > RedBoot> <TT CLASS="USERINPUT" ><B >mfill -b 0x100000 -l 0x20 -p 0xDEADFACE</B ></TT > RedBoot> <TT CLASS="USERINPUT" ><B >mfill -b 0x200000 -l 0x20 -p 0xDEADFACE</B ></TT > RedBoot> <TT CLASS="USERINPUT" ><B >mcmp -s 0x100000 -d 0x200000 -l 0x20</B ></TT ></PRE ></TD ></TR ></TABLE > </P ><P >Compare two buffers which don't match. Only the first non-matching element is displayed. <TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="SCREEN" > RedBoot> <TT CLASS="USERINPUT" ><B >mcmp -s 0x100000 -d 0x200000 -l 0x30 -2</B ></TT > Buffers don't match - 0x00100020=0x6000, 0x00200020=0x0000</PRE ></TD ></TR ></TABLE > </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="download-command.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ecos-ref.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="mfill-command.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >load</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="common-commands.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >mfill</TD ></TR ></TABLE ></DIV ></BODY ></HTML >