[Info-vax] clock problems with OpenVMS x86 on VirtualBox

[Arne Vajhøj]

On 5/12/2023 8:32 AM, Dave Froble wrote:
> On 5/11/2023 9:41 PM, gah4 wrote:
>> On Thursday, May 11, 2023 at 4:42:06 PM UTC-7, Arne Vajhøj wrote:
>>> On 5/11/2023 7:02 PM, gah4 wrote:
>>>> How does VMS keep track of time?
>>
>>> According to IDSM then it reads time from the HW clock
>>> at boot and then update it N (N >= 1000) times per
>>> second at IPL 22.
>>
>> So, for all architectures?
>>
>> https://www.digiater.nl/openvms/freeware/v60/vmsfaq/vmsfaq_004.html
>>
> 
> As far as I know, there hasn't been an IDSM release since Alpha.  So, 
> who knows?

Various VMS people know.

But my understanding is that:
* VAX to Alpha added a ton of new features
* Alpha to Itanium was mostly a 1:1 port (unless new ISA
   required a change)
* Itanium to x86-64 is mostly a 1:1 port (unless new ISA
   required a change)

So unless there is a difference between Alpha, Itanium
and x86-64 regarding clocks requiring a change then I
would expect it to still be so.

Arne