First of all .. Xbox games are pressed on DVD's , not cd's.
A xbox is just a P3 machine with an OnBoard Geforce chipset and shared memory. It'll be no surprise that Microsoft just did some encryption and security settings.
The player in a xbox is usually a "standard" Samsung dvd player , except for the front loader and connections. It uses standard IDE/ATAPI to communicate , uses a standard power connector , but also uses a weird white connector (with yellow cables) on the audio out.
The content of a xbox dvd cannot be read in a normal dvd player ,only in a Xbox itself. It is however no problem transferring the content of a xbox dvd to your pc using ftp on a modified bios/dashboard.
You will need to make a modified iso of your copied game though , and usually some executables have to be patched (Xbox executables check if they are runned from dvd). Modifying the iso can be done via special programs.
The only thing the modified bios/dashboard does is to SKIP the protection check. Nothing more , nothing less.