On Thu, 2004-07-29 at 18:33, Robert Howells wrote:
> Hi People,
> I need to find out what voltage should be seen on what pins of the 50 
> way ribbons
> feeding to the Hard drive in a Mac 7600 box
> 
> Can anybody direct me to a source of information , please ?

You'll want to find the ATA disk interface specification. Google should
help.

--
Craig Ringer