Around 1990 we (students) inherited a bunch of these. I remember they were pretty slow for the time, and I think the compiler was K&R only...
The terminal was pretty nice, I mean the keyboard had a nice feel. I think it deviated from ANSI in some weird ways, it needed its own termcap entry... ah yes, pt1500 I think- 26 rows!
pt|pt1500|gt|t0|Convergent Technologies PT:\
:ae=\17:al=\E[1L:am:as=\16:bs:\
:cd=\E[0J:ce=\E[0K:cl=\E[2J\E[1;1H:cm=\E[%i%2;%2H:co#80:\
:dc=\E[1P:dl=\E[1M:do=\E[1B:ei=:ho=\E[1;1H:\
:ic=\E[1@:im=:kb=\10:kd=\E[B:kl=\E[D:kr=\E[C:ku=\E[A:li#26:\
:k0=\EOY:k1=\EOP:k2=\EOQ:k3=\EOR:k4=\EOS:\
:k5=\EOT:k6=\EOU:k7=\EOV:k8=\EOW:k9=\EOX:\
:nd=\E[C:se=\E[m:sf=\E[1S:sr=\E[1T:so=\E[7m:ue=\E[m:up=\E[A:us=\E[4m: