On 8/8/2017 9:35 PM, Jon Elson via cctalk wrote:
The EE department had an 8S which I wish I could have gotten my hands on
(UMR). I had both it and an 8I in the lab in the Materials Research
Center building and ran a number of programs on both which matched,
8 **S** Arrgh! The worst computer DEC ever made! It was a real
speed demon, when compared to computers with vacuum tubes and drum
The 1949 rack under the 8S backplane is a tty controller, clock and
power supply with attendant hoses to the backplane above.
I think that may be what you were asking about. I don't know much 8s
history, but unlike the 8L and 8I which came with the backplane wired
with a spot for the TTY, this may have been what you had to do to get a
TTY attached. Or it may be an extra second device. Perhaps someone with
more familiarity with the 8S backplane and options might know.