On 01/15/2014 07:20 PM, Johnny Billquist wrote: Heh! The DZ-11 is a hog. We all know that. But the LP11 is not really much better. It's also interrupt per character unless I remember wrong. But it's only one printer per card, and no input. And of course, much faster, since it's parallel with handshaking. The Unibus controller I used at work, and later at home, with an LA180 was an LS11. I don't remember if it was interrupt-per-character as well, but since it was fairly non-dense TTL logic, I'd assume it was. It fared very well on my 11/34 running (at the time) RSX. In the mid-1980s, I was the first person to turn in high-school homework on printer paper. Even some of the teachers were asking what kind of "typewriter" made such "strange-looking print". ;) -Dave -- Dave McGuire, AK4HZ New Kensington, PA