On Sun, Feb 21, 2016 at 4:54 PM, Warren Toomey <wkt at tuhs.org> wrote: Oh. A few years ago I corresponded with DMR about precisely this project. He mentioned having those listings; we pondered whether it would be practical to get them machine-readable and try to get them loaded and booting on one of my pdp-15s to recreate an operational 18-bit Unix... but ultimately decided it was impractical at the time. And from 2007... "Post by Dennis Ritchie Was there a PDP-9 [Unix] port? Mr. Ritchie, sir? Yes, Ken moved the -7 system to both the PDP-9 and PDP-15 just to try them out. Minimal effort, just some new drivers, no effort to take advantage of extra features on either. Total time they actually ran was probably measured in hours or a few days at most. One of the machines ran a step-and-repeat camera for making IC masks. And all that software is presumably long gone along with the PDP-7 version. Oh, well." Mike http://www.corestore.org 'No greater love hath a man than he lay down his life for his brother. Not for millions, not for glory, not for fame. For one person, in the dark, where no one will ever know or see.'

No personal experience, but SIMH supports the PDP-7, and there is a "macro7" cross-assembler at: https://github.com/simh/simtools/tree/master/crossassemblers/macro7 Tho I did debug hand entered versions of DDT and MACRO for the PDP-1, so I've experienced the particular kind of pain involved in this sort of project... I even adapted the SIMH macro1 cross-assembler to be a more faithful emulation of PDP-1 MACRO. See http://www.ultimate.com/phil/xy/ Phil