<Remember.. the *PDT* was supposedly a smart terminal (at least the <11/110 and 11/130 were little more than that) That was the plan. I found that the 11/130 I have runs RT-11 quite nicely and it's the fastest of the tu58 based systems (uses an oddball parallel interface tu58). <It is a member simply by virtue of the fact that the CPU is the same <architecture. Nothing that was done in the PRO precluded that... it <just took a little more programming to control anything since you had <to program the interrupt controller... Think of it as more flexible... runnin for the door. ;) Seriously the hardware boys seemed to be just a touch off center for the realm. Even the VT180, a very good CPM engine design they left off two sided (rev-H has it but I've never seen a real one) and that crippled disk expansion to the denser two sided media. Allison