Centurion mini-computer, competitor of PDP-11, but smaller and cheaper

The terminal is probably some rebrand of ADDS Regent 40 Terminal or more likely
ADDS Regent 100 Terminal.

Applied Digital Data Sys., Inc., Hauppauge, New York.

The ADDS Regent 100 Terminal was the standard terminal used by Centurion
for many years. It uses a relatively common 80 columns x 24 lines design
with a highly crisp and clear display. Communication is through a
standard DB-25 connector that supports either RS-232 or 20/60mA current
loop (selectable via a dip switch on the back).

Special Characters

One problem that we ran into very early on is that this terminal does
not have any Function keys, and the version of the OS that we have is a
very late version, that was written with a later ADDS Regent 25 in mind,
which does have Function keys. In particular, when saving settings in
the operating system using the SYSGEN utility, the input information is
saved by pressing the F4 key (this procedure is outlined in the
excellent CPU6 Programmers Manual). To get the function key output, the
operator presses "CTRL+B" then presses the number "4" and finally
"Newline." It's a bit of a roundabout method, but works exactly as
intended.

Other capabilities

The ADDS 100 is a pre-ANSI terminal, released in 1977. It is
cursor-addressable and can display a subset of the VT100's highlight
modes and special characters, though it is not clear the Centurion
software ever used these capabilities. Its special control sequences can
be investigated by typing "infocmp adds200" at the shell prompt of any
Unix system; ignore the function-key definitions, as those are
physically absent on the 100.

Warrex Computer Corporation (1974-1976), later renamed Centurion
Computer Corp. (1976-1981), Dallas, (also called Centurion Business
Computers in some ads) later bought by Ross Perot and EDS (Electronic
Data Systems Corp.), from 1981-1984. In 1984, it was bougth back from
EDS by group that included Centurion's original owner, Centurion, Inc.
Eventually went bankrupt. After being sold to ZTRon in 1984 and ZTron
subsequently going bankrupt in 1986, Centurion was sold to Cruze
Computers who still currently hold the intellectual property rights to
Centurion.