> This is what I noticed too, and never found  a way to get interrupts
> generated.

My problem is that the tape drive isn't probed successfully. Unless I'm
mistken, this is done using polling, so the interrupt problem is a red
herring (as far as I'm concerned right now).

> I suspect for this it has to snoop the command register,
> and it doesn't know about the ATAPI protocol.

Stop it. You're scaring me. 

Now I have to go and find my Promise card's manual.

Cheers,
Lloyd