[Info-vax] A portable VMS, was: Re: OS Ancestry

[Arne Vajhøj]

On 5/18/2021 2:54 PM, Bill Gunshannon wrote:
> On 5/18/21 2:33 PM, Simon Clubley wrote:
>> On 2021-05-17, Arne Vajhøj <arne at vajhoej.dk> wrote:
>>> On 5/17/2021 3:12 PM, Simon Clubley wrote:
>>>>
>>>> Imagine if, for example, RMS had been designed in a world where C was
>>>> the lowest level instead of Macro-32. You would not need any of the
>>>> 32-bit versus 64-bit RMS APIs (it would be just one API at source code
>>>> level) and your program would either be a pure 32-bit application or a
>>>> pure 64-bit application.
>>>
>>> Note that there is no such thing as 32 bit and 64 bit mode on VMS.
>>
>> VAX. Which is where VMS started (and 32-bit processors are where Unix
>> and Linux started). 
> 
> PDP-7?  PDP-11?

:-)

Unix started with PDP-7 (18 bit) and PDP-11 (16 bit).

Linux started with 386 (32 bit).

Arne