[Info-vax] VMS Software needs to port VAX DIBOL to OpenVMS X86 platform

[Simon Clubley]

On 2020-12-24, David Jones <osuvman50 at gmail.com> wrote:
> On Thursday, December 24, 2020 at 12:06:47 PM UTC-5, John Dallman wrote:
>> I reckon VSI should stay on their current course with the x86-64 port, 
>> but should do so with an eye to a need to follow up with ARM. Clang and 
>> LLVM are already mature technology on ARM, so there should not be any 
>> need for switching compilers. 
>> 
>
> And there is also RISC-V on the horizon.

The one thing I am not seeing people address when they make suggestions
for alternative architectures for VMS to run on, is how they would
efficiently solve the 4-mode KESU problem when running on a 2-mode KU
architecture.

VSI got lucky with x86-64 because PCID is available on Intel at least.

What about the other architectures that you would like to see VMS
running on ?

And no, the address space stuff which exists in some versions of ARM
is not a viable alternative as was pointed out previously by someone.

Simon.

-- 
Simon Clubley, clubley at remove_me.eisner.decus.org-Earth.UFP
Walking destinations on a map are further away than they appear.