<>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). < <And is that using the technique I developed for positioning files <on the TU58 to reduce latency on RT? I've had RT cold boot from TU58 <in as little as 28 seconds... That and the PDT11/130 parallel interface VS standard TU58 serial interface. The PDT11 version of the TU58 is an oddity and becuase of the parallel interface some of the serial versions buffer overflow and data pasing issues are not a reality so you end up running closer to the possible peak data rate with less host latency. The giveback is the PDT11 uses the LSI-11 clearly the slowest of the PDP-11s (t11 can beat it!) so if there is any procesing the tu58 is not the bottleneck anymore. Allison