On Wed, Apr 17, 2019 at 2:48 PM W2HX via cctalk <cctalk@classiccmp.org> wrote: > ?Hi friends. I am putting together a PDP-11 set up. i have a few CPUs > available to me, a 11/23+, an 11/73 and I also have available to me an 11/83, > M8190-AE . > > I would like to try to run as many different OS's as may interest me, > including some unixes as possible (bsd...etc). My question is, are there any > OSes that need the floating point option?
I know old UNIX (v2) needs a KE11-A or KE11-B (a Unibus peripheral integer math option), which really wasn't something people bought/installed in an 11/34 or later. v5, v6, and v7 UNIX shouldn't require any sort of math hardware. Simple OSes like RT-11 do not require it and the The usual DEC timesharing OSes (RSX-11, RSTS/E...) won't require it,, though you may encounter a FORTRAN application that was compiled to require it. -ethan
