[TUHS] Need a new PDP-11 or VAX?

[Larry McVoy]

The 68020 came close.

On Sun, Apr 28, 2013 at 01:38:47PM +1000, Nick Downing wrote:
> I think the 68K came fairly close to what you guys are asking for, with its
> addressing modes like (a0)+ and so on. it's only 32 bit but that's better
> than 16 bit :) the problem I have with 68K is that while the assembly
> language is basically orthogonal the machine code is not, there are too
> many exceptions in the encoding, which I think was done to save precious
> code space. (Kind of like ARM Thumb code -- and by the way you may find ARM
> more PDP11-like than the other archs you mentioned). Anyway, some of the
> latest 68K such as Dragonball(?) have gone some way towards correcting this
> deficiency by not implementing many of the more irregular insns.
> cheers, Nick
> On Apr 28, 2013 12:00 PM, "John Cowan" <cowan at mercury.ccil.org> wrote:
> 
> > Larry McVoy scripsit:
> >
> > > What I'd like is a new 64 bit PDP-11.
> >
> > With a 16-bit instruction stream still, or with wider instructions and
> > more registers, almost but not quite entirely unlike the Vax?
> >
> > --
> > De plichten van een docent zijn divers,         John Cowan
> > die van het gehoor ook.                         cowan at ccil.org
> >       --Edsger Dijkstra                         http://www.ccil.org/~cowan
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> >

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-- 
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Larry McVoy                lm at bitmover.com           http://www.bitkeeper.com