Hi again,
Now my problem is with my ide interface! Im´using a code based on the pjrc idefast.asm code. The code seams to be working well, for example: I write to de Device Head IDE Register, read it back and it matches to the value I wrote, but when I try this with other registers, like Sector Count, I get a const value no matter what I wrote (Sector Count returns 0x01, Cylinder Low returs 0x00...).
I checked my hardware and it is flawless. I´m using an 8255 addressed at 0x8000 (base).
You can get my asm source here - and more info of this project at this page.

Thanks, Gabriel.