the pdp-7 was run on the almost compatible pdp-9 and pdp-15 computers. i dont think that version of unix ever made it out of the research department. On Mon, Dec 18, 2023 at 5:54 PM segaloco via TUHS <tuhs(a)tuhs.org> wrote: > Are there any documented or remembered instances PDP-7 or Interdata 8/32 UNIX being installed on any such machines for use in the Bell System aside from their original hosts? Along similar lines, was the mention of PDP-7 UNIX also supporting the PDP-9 based solely on consistencies in the architecture or did this early version of UNIX actually get bootstrapped on a real PDP-9 at some point? > > My understanding of the pre-3B-and-VAX landscape of UNIX in the Bell System is predominantly PDP-11 systems, but there was also work in the late 70s regarding 8086 hosts as evidenced in some BSTJ and other publications, and there is the System/370 work (Holmdel?) which I don't know enough about to say whether it technically starts before or after UNIX touches the VAX. > > Thanks for any info! > > - Matt G.