cctech Digest, Vol 78, Issue 3

Dave McGuire mcguire at
Fri Feb 5 16:17:56 CST 2010

On Feb 5, 2010, at 5:14 PM, Chuck Guzis wrote:
>>    8255s are frequently used to interface to IDE drives, and mode
>> switching is required in that application, and it does get in the
>> way.  Mostly people have dealt with it by using inverters on some of
>> the lines.
> Really?  I don't think I've seen a single piece of modern gear made
> in the last 10 years that uses an 8255 to interface to an IDE drive.
> They do have specialized chips to do that...
> If it's the hobbyist clan, well, that's a different matter.

   The SBC6120 comes to mind.  Considering the number of units sold  
and the level of commercialization of the whole deal, I'm not sure  
I'd consider it "hobbyist clan".

>   I'd think even a small CPLD would do a better job.

   That's what I'd have done on that board.


Dave McGuire
Port Charlotte, FL

More information about the cctech mailing list