[Info-vax] BASIC and AST routines

[Simon Clubley]

On 2021-11-24, Arne Vajhøj <arne at vajhoej.dk> wrote:
> On 11/24/2021 8:31 AM, Simon Clubley wrote:
>> On 2021-11-23, VAXman-  @SendSpamHere.ORG <VAXman- at SendSpamHere.ORG> wrote:
>>> In article <snjcd1$9hn$2 at dont-email.me>, Simon Clubley <clubley at remove_me.eisner.decus.org-Earth.UFP> writes:
>>>> That information is only needed because the lowest supported application
>>>> language on VMS is Macro-32 and not C (or another comparable low-level
>>>> language).
>>>
>>> You're slinging your BULLSHIT yet again.  Macro-32 has no inherent need
>>> or want to know R0, R1, the PC at AST delivery or the PS/PSL.  As I have
>>> requested previously, if you want to be slinging manure in here, please
>>> show us your shovel.
>> 
>> Fine. So why are these architecture-specific registers passed to what
>> is essentially a callback function in a normal application program
>> and why do those registers need to be visible from that same callback
>> function ?
>
> So far there has only been one guess: yours - that it is to
> support applications in Macro-32. And that explanation does
> not make any sense as Macro-32 applications do not need info
> that C applications does not.
>

Not directly, but you might have to manually manage or preserve
something in Macro-32 that an OS based around a higher-level language
could handle for you automatically in the code generated by the
compilers for that OS.

Simon.

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