Re: New Vax - future directions :-)

[Anders Magnusson <ragge%tethuvudet.se@localhost>]

Den 2021-07-07 kl. 11:37, skrev Hans Rosenfeld:
> On Sat, Jul 03, 2021 at 03:46:00PM +0200, Anders Magnusson wrote:
> > Convenience:
> > Even though there are 288 instructions, a few are missing that would be
> > nice.  For example;
> > - Unsigned mul/div.  Vax only have signed.
> > - logical shift right.  Vax have EXTZV, but it is an unneccessarily
> > complicated instruction.
> > - AND.  Vax have BIC instead, but that (almost) always require a complement
> > as well.
> And, can we perhaps get a PDP11 compatibility mode, too? Like the one
> early VAX-11 models had? Please? :)
>
> Thanks for breathing some life back into the VAX, and into port-vax.
> This is so amazing on so many levels. :)
Hm, I haven't thought of that before, but it might be quite trivial to 
do that.
Almost no extra hardware, just a separate match for the microassembler.

I'l keep it in mind.  Does not have high priority though :-)

-- R