On Mon, Nov 29, 2021 at 1:06 PM Ethan Dicks via cctalk <
cctalk at classiccmp.org> wrote:
  On Mon, Nov 29, 2021 at 3:19 PM Henk Gooijen via
cctalk
 <cctalk at classiccmp.org> wrote:
  I think the FP11 boards are not essential for the
11/70
 They only add hardware FP support. 
 Not essential for many uses, but I'm pretty sure UNIX is unhappy
 without them.  If you are going to run RSTS/E or RT-11, should be just
 fine either way.
 
Depends on the UNIX.  Ultrix works fine, and the latest patchlevel of
2.11BSD has floating point simulation that works fine.
(I'm running my 11/70 sans floating point hardware at the moment, I'd still
like to find a boardset one of these days, though.  Floating point
emulation is slow!)
  However, I think that the cache boards are
essential.
 Not sure the 11/70 will work without them. 
 Agreed.  I think those _are_ mandatory.
 
 
Yes, the cache is an integral part of the memory system on the 11/70.
- Josh
  Cheers,
 -ethan