Hello,

schematics can be found all over
the internet.

http://www.pjrc.com/tech/8051/ide/

Here he used an IDE controller chip.
but i didn't had one, so i connected
it directly to my micro.

DO NOT FORGET to add a 10kohm pull down
resitor on DD7 (thats where the busy signal resides if you read the status
of the IDE device...
All other can be wired up just like
the scheme does.)