Hi!
I have downloaded a Brief reference about IDE (Hard disk) and ATA (CDROM) from a website. Unfortunetly I didn't able to eat that much of information and only just download it and then lost it. Also I have lost the website address, but I have remember the website which i think holds that kind of information and lot more.
Just goto http://www.faqs.org/ and search for IDE or some thing like that in Faq and other searches. but I should tell you that I have try to read documentation but its too big. Please if you find any thing simple and easy, (especially for interface of IDE with MCU etc) Please tell me.