|
Message
From: Mark McDougall<markm@v...>
Date: Fri Dec 2 04:00:34 CET 2005
Subject: [oc] IDE interface
slewis@b... wrote:> Would I need to daisy chain the interface
> through the FPGA? Or could they simply be parrallel?
After thinking about it for a few more minutes, I've realised that you
definitely can't run them in parallel. You have two hosts connected on
the same ATA bus, and no way of arbitrating between them. So regardless
of what you do in the FPGA, your PC controller will trounce all over
your FPGA controller when it's talking to the device.
Would you *could* do I suppose is to sit the FPGA between your PC host
controller and the device. Then it could 'emulate' a device as far as
the PC sees it, and allow the FPGA to control access to the real device.
However, this would play havoc with your performance and all sorts of
software timeouts in your PC OS drivers.
In short, it's not something I would consider doing myself.
What is your exact problem/requirement? I'm betting there's a better way
to do it!?!
Regards,
--
Mark McDougall, Software Engineer
Virtual Logic Pty Ltd, <http://www.vl.com.au>
21-25 King St, Rockdale, 2216
Ph: +612-9599-3255 Fax: +612-9599-3266
|
 |
Browse
