How Does A Mod Chip Work? For Newbies, Made by Dark Master

[fattwam]

Lets start this with an unmodded xbox. It basically works like this. It turns on, plays that little flubber animation, displays the xbox logo, and then looks for a disc in the dvd drive. If the disc meets certain criteria(digital signatures and media flags mainly) it then executes default.xbe off of the root of the disc. If there is no disc in the drive, the xbox then boots xboxdash.xbe(the xbox dashboard) off of it's hard drive.

This is all done by the xbox BIOS.

 

Some very crafty people managed to obtain this BIOS from the xbox and modify it. The base thing they've done is to remove the requirements for digitally signed software, and also remove the requirements for special media flags for discs put into the dvd drive. This new BIOS is then put onto a flash rom of some sort and wired into the xbox. THe xbox powers up and then executes this new bios instead. The new BIOS does the exact same thing as the original, minus the checks for digital signatures and media flags.

 

At this point, you can then run unmodded code. The first thing you'll likely run is the Evolution-X dashboard. There are many tutorials on how to set it up, install it on your xbox, etc.

 

Tutorial Courtesy of T.B.