24 Aug
2012
24 Aug
'12
7:06 p.m.
On 08/24/2012 09:41 PM, Chuck Guzis wrote:
8-bit mode is required by the CF standard. It's not required for IDE,
and most IDE devices don't implement it. I've seen a few very old ones
that do, but that's about it.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
If it helps, I
made an ATA interface for my Z80 single board computer.
It uses five IC's (two 74374's, one 74245, one 74367, one 7432). It
can't support DMA as the high and low bytes of the 16-bit bus are at
different addresses, but it's easy to make.
Just about any CF card can be set to operate in 8 bit mode. Same
goes for Microdrives. So the circuitry can be very simple indeed if
all you are going to use are the CF cards.