[Info-vax] 64-bit (was Re: New CEO of VMS Software)

[Dave Froble]

On 1/11/2024 3:48 PM, Arne Vajhøj wrote:
> On 1/11/2024 1:17 PM, Simon Clubley wrote:
>> On 2024-01-11, Dave Froble <davef at tsoft-inc.com> wrote:
>>> On 1/11/2024 8:56 AM, Simon Clubley wrote:
>>>> On 2024-01-11, Dave Froble <davef at tsoft-inc.com> wrote:
>>>>> On 1/10/2024 8:43 AM, Simon Clubley wrote:
>>>>>> On 2024-01-09, Dave Froble <davef at tsoft-inc.com> wrote:
>>>>>>> As far as I know, totally 64 bit apps can be implemented on VMS.  So,
>>>>>>> what's the
>>>>>>> problem.  The fact that there is also that 32 bit capability hanging around
>>>>>>> should not be a detriment, right?
>>>>>>
>>>>>> Try using RMS in totally 64-bit mode. Unless there's been further
>>>>>> development since, not everything in RMS had a 64-bit address option.
>>>>>
>>>>> My understanding, which could be totally wrong, is that the major concept
>>>>> of "64
>>>>> bit" is about addresses.
>>>>
>>>> And that is exactly what I am talking about. Not everything in RMS had
>>>> a 64-bit addressing API the last time I checked.
>
> That is correct. Practically only data related fields in RAB64
> supports 64 bit addresses.
>
>>> Then I have to ask, "so what?"=
>>
>> You claimed that "totally 64 bit apps can be implemented on VMS".
>> I am showing you why that is not the case.
>
> I guess that depends on what is meant by "totally 64 bit".
>
> If it means that all addresses stored in process space whether
> user code or VMS code are stored as 64 bit then it indeed seems
> unlikely.
>
> It it means that in user code all addresses are 64 bit, then that
> should be doable.
>
>>> If RMS doesn't fit your requirements, then don't use it.
>>
>> Everyone uses RMS, even if it hidden from you by the language. The RMS
>> references are still in the executable you create however.
>
> In practice yes.
>
> In theory one can use SYS$QIO(W) for all IO and bypass RMS. But
> it is very cumbersome (especially if one cannot use RMS for stuff
> like finding IFI).
>
> Arne
>

And if one is using a database product that has nothing to do with RMS ???

-- 
David Froble                       Tel: 724-529-0450
Dave Froble Enterprises, Inc.      E-Mail: davef at tsoft-inc.com
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