PDP emulation

From: allisonp_at_world.std.com <(allisonp_at_world.std.com)>
Date: Mon Mar 6 07:41:53 2000

> > I forget if V7 needed I&D space or 2.11 meaning the 11/23 was not enough.
> > The 11/73 has the added I&D bits where 11/23 only has user registers and
> > MMU.
>
> BSD2.11 does need separate I&D, but V7 doesn't. If you don't have separate
> I&D, ISTR you need to build it for "small machine", and it runs a bit
> slower.

I knew it was something like that.

> I tried swapping my M8186 (11/23) for M8192 (11/73) but it doesn't run.
> Maybe I need to rebuild the kernel (I've got an original distribution, not
> one of the images from PUPS), but perhaps it would work with more memory or
> by swapping RLV11 for RLV12.

Cpu doesn't run or doesn't run V7? The image I have only wants some 256k
of ram out of all teh installed ram. I get the impression it was
configured for an 11/34 or similar and that is mostly a 11/23 save for the
11/23 mmu can go to 22 bits.

Allison
Received on Mon Mar 06 2000 - 07:41:53 GMT