On Wed, May 1, 2019 at 1:54 PM Antonio Carlini via cctalk < cctalk@classiccmp.org> wrote:
> Then (I think) came the VAX 8600 and that needed VMS V4.0. That (I > think, but I can't find anything to support this right now ...) is when > the last of the PDP-11 compatibility code was finally removed. > The VAX 8600 and 8650 were the last VAX models to have PDP-11 compatibility mode, so if the purpose of VMS 4.0 was to support the 8600, I would expect it to still contain compatibility mode support. VMS versions at least as late as 5.2 still supported the 8600. I don't have firsthand experience, as the only 8600 I used ran BSD.
