What is a .cdi file?

[madmax1345]

I have been looking for the VCD player for the Dreamcast. After some searching I found a FTP site that had the file DC_Boot_Disc_vga.cdi.
1. What is a .cdi file?
2. Is this the file that is burned so that the DC will play a VCD?

 

[Glaanieboy]

a .cdi file is a file format like .iso and .cue. You can burn .cdi files using Alcohol 120 %. For more information, go here:
http://www.geocities.com/hardcore18/burning_new.html