Noel,
On Fri, Nov 21, 2014 at 1:14 PM, Noel Chiappa <jnc at mercury.lcs.mit.edu>
wrote:
If you have a working UNIBUS PDP-11, there are still 20mA serial interfaces
avalable for it. I have a DL11-C (M7800-YA) you can have for what I paid
for
it (a song, just about), and someone on eBay has a DZ11-C (M7814) for sale
for cheap; someone else there has the breakout panel for it.
I have virtually no idea what any of that means. =/