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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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>Key Features</TITLE
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><TR
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>eCos User Guide</TH
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><A
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><DIV
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CLASS="CHAPTER"
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><H1
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><A
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NAME="ECOS-KEY-FEATURES">Chapter 1. Key Features</H1
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><P
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></P
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><UL
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><LI
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><P
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><SPAN
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CLASS="PRODUCTNAME"
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>eCos</SPAN
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> is distributed under the GPL
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license with an exception which permits proprietary application code
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to be linked with <SPAN
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CLASS="PRODUCTNAME"
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>eCos</SPAN
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> without itself being
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forced to be released under the GPL. It is also royalty and buyout
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free.</P
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></LI
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><LI
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><P
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>As an Open Source project, <SPAN
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CLASS="PRODUCTNAME"
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>eCos</SPAN
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> is
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under constant improvement, with an active developer community, based
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around the <SPAN
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CLASS="PRODUCTNAME"
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>eCos</SPAN
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> web site at <A
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HREF="http://sources.redhat.com/ecos/"
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TARGET="_top"
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>http://sources.redhat.com/ecos/</A
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>.</P
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></LI
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><LI
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><P
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>Powerful GUI-based configuration system allowing both large and
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fine grained configuration of <SPAN
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CLASS="PRODUCTNAME"
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>eCos</SPAN
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>. This
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allows the functionality of <SPAN
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CLASS="PRODUCTNAME"
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>eCos</SPAN
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> to be
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customized to the exact requirements of the application.</P
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></LI
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><LI
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><P
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>Full-featured, flexible, configurable, real time embedded
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kernel. The kernel provides thread scheduling, synchronization,
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timer, and communication primitives. It handles hardware resources
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such as interrupts, exceptions, memory and caches.</P
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></LI
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><LI
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><P
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>The Hardware Abstraction Layer (HAL) hides the specific features
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of each supported CPU and platform, so that the kernel and other
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run-time components can be implemented in a portable fashion.</P
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></LI
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><LI
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><P
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>Support for &micro;ITRON and POSIX Application Programmer
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Interfaces (APIs). It also includes a fully featured, thread-safe ISO
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standard C library and math library.</P
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></LI
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><LI
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><P
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>Support for a wide variety of devices including many serial
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devices, ethernet controllers and FLASH memories. There is also
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support for PCMCIA, USB and PCI interconnects.</P
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></LI
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><LI
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><P
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>A fully featured TCP/IP stack implementing IP, IPv6, ICMP, UDP
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and TCP over ethernet. Support for SNMP, HTTP, TFTP and FTP are also
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present.</P
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></LI
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><LI
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><P
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>The RedBoot ROM monitor is an application that uses the
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<SPAN
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CLASS="PRODUCTNAME"
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>eCos</SPAN
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> HAL for portability. It provides
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serial and ethernet based booting and debug services during
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development.</P
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></LI
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><LI
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><P
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>Many components include test programs that validate the
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components behaviour. These can be used both to check that hardware is
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functioning correctly, and as examples of
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<SPAN
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CLASS="PRODUCTNAME"
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>eCos</SPAN
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> usage.</P
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></LI
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><LI
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><P
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><SPAN
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>eCos</SPAN
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> documentation included this User
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Guide, the Reference Manual and the Components Writer's Guide. These
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are being continually updated as the system develops.</P
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></LI
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>Introduction</TD
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>eCos</SPAN
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> Overview</TD
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>

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