19 Aug
2004
19 Aug
'04
6:36 a.m.
>>>> "Antonio" == Antonio Carlini
<a.carlini(a)ntlworld.com> writes:
> Please correct me if I'm wrong, but it was my
understanding that
> (part of?) the VAX instruction set was prototyped using the 11/60
> as well.
That seems improbable -- the VAX instruction set is clearly inspired
by the PDP11, but at the bit level they are completely different. I
rather doubt that more than a few percent of the VAX instruction set
would fit into an 11/60 WCS.
Antonio> I believe that there were hardware test rigs in use before
Antonio> the first VAX protos arrived. I believe that I've read that
Antonio> they were based on a modified PDP-11 but I don't recall
Antonio> where I read that. Time to go peruse the early DTJs again I
Antonio> suppose.
Software emulation? That's how initialy PDP11 development was done
(MIMIC on the PDP10).
paul