Specifications

GPL
/ LGPL - GNU General Public License/Lesser General Public License
The full license text can be found at http://www.gnu.org/copyleft/gpl.html.
The licenses under which the Linux kernel and much of the utility and library code necessary to build a
complete system may be copied, distributed and modified. Each portion of the software is copyright by its
respected copyright holder, and you must comply with the terms of the license in order to legally copy (and
hence use) it. One significant requirement is that you freely redistribute any modifications you make; if you
can't cope with this, embedded Linux isn't for you.
Host
The computer system which is used for software development. For instance it is used to run the tools of the
ELDK to build software packages.
IDMA
- Independent DMA
A general purpose DMA engine with relatively limited throughput provided by the microcoded CPM, for use
with external peripherals or memory-to-memory transfers.
JFFS
- Journalling Flash File System
JFFS (developed by Axis Communicartion AB, Sweden) is a log-based filesystem on top of the MTD layer; it
promises to keep your filesystem and data in a consistent state even in cases of sudden power-down or system
crashes. That's why it is especially useful for embedded devices where a regular shutdown procedure cannot
always be guaranteed.
JFFS2
- Second version of the Journalling Flash File System
Like JFFS this is a journalling flash filesystem that is based on the MTD layer; it fixes some design problems
of JFFS and adds transparent compression.
JTAG
- Joint Test Action Group
A standard (see "IEEE Standard 1149.1") that defines how to control the pins of JTAG compliant devices.
Here: An on-chip debug interface supported by a special hardware port on some processors. It allows to take
full control over the CPU with minimal external hardware, in many cases eliminationg the need for expensive
tools like In-Circuit-Emulators.
GPL 207