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<!-- Copyright (C) 2003 Red Hat, Inc.                                -->
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<HTML
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><HEAD
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><TITLE
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>User Interface</TITLE
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><meta name="MSSmartTagsPreventParsing" content="TRUE">
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<META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
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"><LINK
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REL="HOME"
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TITLE="eCos Reference Manual"
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HREF="ecos-ref.html"><LINK
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REL="UP"
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TITLE="Getting Started with RedBoot"
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HREF="getting-started-with-redboot.html"><LINK
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REL="PREVIOUS"
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TITLE="Installing RedBoot"
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HREF="installing-redboot.html"><LINK
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REL="NEXT"
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TITLE="RedBoot Editing Commands"
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HREF="redboot-editing-commands.html"></HEAD
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><BODY
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>eCos Reference Manual</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="installing-redboot.html"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Chapter 1. Getting Started with RedBoot</TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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><A
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HREF="redboot-editing-commands.html"
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WIDTH="100%"></DIV
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><DIV
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CLASS="SECT1"
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><H1
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CLASS="SECT1"
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><A
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NAME="USER-INTERFACE">User Interface</H1
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><P
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>RedBoot
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provides a command line user interface (CLI). At the minimum, this interface
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is normally available on a serial port on the platform. If more than one serial
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interface is available, RedBoot is normally configured to try to use any one
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of the ports for the CLI. Once command input has been received on one port,
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that port is used exclusively until the board is reset or the channel
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is manually changed by the
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user. If the platform has networking
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capabilities, the RedBoot CLI is also accessible using the <TT
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CLASS="COMPUTEROUTPUT"
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>telnet</TT
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> access protocol. By default, RedBoot runs <TT
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CLASS="COMPUTEROUTPUT"
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>telnet</TT
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> on port TCP/9000,
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but this is configurable and/or settable by the user. </P
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><P
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>RedBoot also contains a set of GDB "stubs", consisting of code which supports the GDB remote
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protocol. GDB stub mode is automatically invoked when the '$' character appears
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anywhere on a command line unless escaped using the '\' character.
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The platform will remain in GDB
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stub mode until explicitly disconnected (via the GDB protocol). The GDB stub
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mode is available regardless of the connection method; either serial or network.
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Note that if a GDB connection is made via the network, then special care must
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be taken to preserve that connection when running user code. eCos contains
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special network sharing code to allow for this situation, and can be used
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as a model if this methodology is required in other OS environments.</P
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
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HREF="installing-redboot.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="ecos-ref.html"
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>Home</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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HREF="redboot-editing-commands.html"
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>Next</A
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></TD
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></TR
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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>Installing RedBoot</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="getting-started-with-redboot.html"
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ACCESSKEY="U"
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>Up</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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>RedBoot Editing Commands</TD
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></TR
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></TABLE
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></DIV
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></BODY
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></HTML
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>

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