How to make DOS see my CD-ROM?

Sorry to go back to the CD question, but I have to know!

Now, this is an honest question. Since when do you need any drivers to use a CD drive? I’ve wiped my HD many times and then booted from the CD as LordVor said. Of course, if he could boot from the CD drive there wouldn’t be a problem in the first place, eh? But I didn’t think there was a problem! (I’m so confused!)

Anyway, I’ve formatted my HD many many times and then booted from a CD afterwards to get my reinstall on. And when I put together my new computer with a brand new hard drive (it better have been new!), I had no problems booting from CD.

So what’s the deal? Was I lucky enough that my system had a barebones driver somewhere in ROM? Or is booting from a CD somehow different than reading it “file style”?