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CompactFlash True IDE support for master/slave

Started by Theo Markettos April 1, 2007
I'm contemplating replacing an old ATA hard disc with a CompactFlash card in
an adaptor.  I've been reading the CF 2 specification, which suggests that
/CSEL is used to select between master and slave mode (grounded=master,
open=slave).  So if I use an adaptor I should be able to put a CF card and
another IDE device on the same bus. 

In theory.  But knowing that True IDE isn't well tested, how well does this
actually work for real CF cards out there?

Thanks
Theo
On Apr 1, 8:03 pm, Theo Markettos
> /CSEL is used to select between master and slave mode (grounded=master,
Cable select is shaky territory in general on ATAPI devices, not just CF cards. In a previous life some years ago, we tried to add internal storage for a device with an externally-accessible CF card by simply wiring a second CF slot in parallel and trying to use CSEL as you describe. We found some cards would fight.
larwe <zwsdotcom@gmail.com> wrote:
> On Apr 1, 8:03 pm, Theo Markettos > > /CSEL is used to select between master and slave mode (grounded=master,
> Cable select is shaky territory in general on ATAPI devices, not just > CF cards.
In my experience it's mostly shakey because of cable/motherboard issues. Force grounding the master at "source" usually is fine.
> In a previous life some years ago, we tried to add internal storage > for a device with an externally-accessible CF card by simply wiring a > second CF slot in parallel and trying to use CSEL as you describe. We > found some cards would fight.