If you delete it, you at least have to find another one that is for your make and model of router. That is why it is so important not to ever delete this without backing it up. It has the MAC addresses embedded in it for your router, so each one is a little different. Every router has it's own particular CFE. So, when people talk about the CFE of the router, they are talking about the bootloader. Linksys also used a VXworks bootloader on some routers that has to be replaced with a CFE linux bootloader using a VXKiller program. The bootloader on a DD-wrt is a linux bootloader, known as a CFE. These three parts together are known as the WHOLEFLASH. The firmware is composed of a bootloader, (that starts up the router's operating system), the NVRAM, (where information particular to your router are stored, like it's IP address and your ssid name) and the kernel which is the program that your router uses. In order to understand jtag, you need to understand the three parts of the program that runs inside your router (known as the router's firmware). You often need to solder a pin connector to your motherboard.
These ports do not usually have the pins there to connect to, but are just holes in your router motherboard.
#WINDBOUND WIKI SERIAL#
There are sometimes two similar ports on a router one is the jtag port and the other is a serial port. Jtag is done with a cable hooked from a computer 25 pin printer port (USB might also be available) to an electrical connection on your router called a jtag port. Jtag is a program for fixing your router if it is in an otherwise unrecoverable state.
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