PDP-11/70 Boards

[Paul Koning]

> On Nov 29, 2021, at 4:12 PM, Josh Dersch via cctalk <cctalk at classiccmp.org> wrote:
> 
> 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!)

Another option would be a compiler that generates no-FP code.  That's faster than emulation.  gcc can do that; does 2.x BSD cc have such an option?

	paul