It has been almost 20 years since I used that stuff, I did work on Burroughs on mainframe-PC integration and terminal subsystem stuff for three years, so I should remember some of it, shouldn't I? Almost no one was using MT-985 when I got there in 86. We all had ET-1100s and ET-2000s (a Burroughs PC clone that was also a Burroughs terminal). I don't recall them having any dumb serial terminal capability. It was a block mode terminal where the mainframe application would send down the form (a mix of text and formatting codes) in one chunk and the terminal would display it, then the use would fill in the fields and send it back to the application in a block when the user hit the transmit key. Electrically, we always used a two-wire interface (TDI or Two Wire Direct Interface). I recall that the connector was a DB-25, but only two pins were used, but that could just be bad memory. The protocol used to communicate with the terminals was called Poll/Select. It was half duplex. The terminal processor (can't remember what those were called in Burroughs-speak) would go through the terminals attached to it and query them to see if they had anything to send and, if a terminal did, it would. Given how hard it is to find info on Burroughs stuff these days, I wish that had saved more stuff when I left. alan