On 2013-01-06 21:34, John Wilson wrote: From: "Steve Davidson" <jeep at scshome.net> The main target for the PDT-11 was RT-11. It was slow. The floppies spent a great deal of time seeking. Slow, but still a PDP-11! I had a /150 (plus VT62 and LA36) as my main computer when I was a frosh at RPI ('84-'85) and it was quite a bit above average compared to other personal computers at the time (C64, Apple ][, TRS-80, Atari 800, but IBM PCs were still rare -- so mostly fun toys with pretty graphics but slow and no disk space and usually no 80-column text). With 60 KB and most of the floppy/TU58 driver up in ROM space its free memory was at the very high end of MMU-less PDP-11s -- stuff fits in a PDT that won't run on a "real" LSI-11. I ran a PDP-8 at home back then. Boy, those RK05 were fast, and stored a lot. :-) Also, PAL8 was ridiculously fast... MACREL was a bit worse... But still, compared to what most people played with... Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol