On Wed, Aug 25, 2021 at 11:19 AM Tony Duell via cctalk < cctalk@classiccmp.org> wrote:
> On Wed, Aug 25, 2021 at 7:07 PM ben via cctalk <cctalk@classiccmp.org> > wrote: > > > > On 2021-08-25 11:08 a.m., Josh Dersch via cctalk wrote: > > > > > (The Three Rivers PERQ included a similar "RASTEROP" instruction in its > > Well, it might do.There is no requirement for the PERQ machine code > instruction set to include that, or any other particular instruction. > Sure there is -- if it was left out, all of the user code that depended on it would stop functioning :). I can remove instructions from the 11/780's microcode as well, but then it'd cease to be a VAX... - Josh