Looking for a ST419

[Chuck Guzis]

On 31 Oct 2008 at 10:43, Dave McGuire wrote:

>    What do the signals on the data connector look like?  I seem to  
> recall that there are some differential pairs on there...are they  
> analog or digital?

Differential, but digital on the data connector.  26LS31 drivers, 
26LS32 receivers across 100 ohm termination (one section of four is 
used in early drives).  All the control signals are the usual 74LS38 
open collector types.  For the data line driver/receiver, probably 
most RS-422-capable devices would work.

Cheers,
Chuck