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><TITLE
>channel</TITLE
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><H1
><A
NAME="CHANNEL-COMMAND">channel</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN3100"
></A
><H2
>Name</H2
>channel -- Select the system console channel</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN3103"><H2
>Synopsis</H2
><P
><B
CLASS="COMMAND"
>channel</B
> [-1 | <TT
CLASS="REPLACEABLE"
><I
>channel_number</I
></TT
>]</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN3110"
></A
><H2
>Arguments</H2
><DIV
CLASS="INFORMALTABLE"
><A
NAME="AEN3112"><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"
>-1</TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
> </TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Reset the console channel</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"
>channel_number</TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Number</TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Select a channel</TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
><SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>none</I
></SPAN
></TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN3137"
></A
><H2
>Description</H2
><P
>With no arguments, the <B
CLASS="COMMAND"
>channel</B
> command displays the current console channel number.</P
><P
>When passed an argument of 0 upward, this command switches the console
channel to that channel number. The mapping between channel numbers and
physical channels is platform specific but will typically be something like
channel 0 is the first serial port, channel 1 is the second, etc.</P
><P
>When passed an argument of -1, this command reverts RedBoot to responding
to whatever channel receives input first, as happens when RedBoot initially
starts execution.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN3143"
></A
><H2
>Examples</H2
><P
>Show the current channel.
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>
RedBoot> <TT
CLASS="USERINPUT"
><B
>channel</B
></TT
>
Current console channel id: 0</PRE
></TD
></TR
></TABLE
> </P
><P
>Change to an invalid channel.
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>
RedBoot> <TT
CLASS="USERINPUT"
><B
>channel 99</B
></TT
>
**Error: bad channel number '99'</PRE
></TD
></TR
></TABLE
> </P
><P
>Revert to the default channel setting (any console mode).
<TABLE
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><TR
><TD
><PRE
CLASS="SCREEN"
>
RedBoot> <TT
CLASS="USERINPUT"
><B
>channel -1</B
></TT
></PRE
></TD
></TR
></TABLE
>
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