Hi Sanjeev

If your project is not for volume production then you might want to try using National Semiconductor's PD8473. It is no longer in production but can still be obtained through dealers that specialize in parts that are no longer being manufactured. NS has the datasheet (DP8473.pdf) on the web along with some good application notes. Look for application note AN631.PDF. It gives good info on designing disk drive interface for the AT.

JDurbin