Re: Could you write a BSD like os in ADA?

[already5chosen@yahoo.com]

On Wednesday, August 24, 2016 at 6:53:19 PM UTC+3, Bob Broderbund wrote:
> On 2016-08-24, already5chosen@yahoo.com <already5chosen@yahoo.com> wrote:
> > On Wednesday, August 24, 2016 at 6:15:09 PM UTC+3, Bob Broderbund wrote:
> >> On 2016-08-23, already5chosen@yahoo.com <already5chosen@yahoo.com> wrote:
> >> > On Monday, August 22, 2016 at 12:49:07 PM UTC+3, Bob Broderbund wrote:
> >> >> On 2016-08-22, Dmitry A. Kazakov <mailbox@dmitry-kazakov.de> wrote:
> >> >> > On 22/08/2016 07:01, J-P. Rosen wrote:
> >> >> >> Le 22/08/2016 ?? 02:18, Andrew Shvets a ??crit :
> >> >> >>> What would you consider to be a well designed operating system?
> >> >> >>
> >> >> >> VMS! :-)
> >> >> >
> >> >> > Yes, VMS was likely the best OS ever.
> >> >> 
> >> >> Close.. try another permutation of the same letters!
> >> >> 
> >> >> Hint: it's the oldest OS still in development and production, and processes
> >> >> 95% or more of the world's financial transactions.
> >> >>
> >> >
> >> > IBM MVS/zOS is ~42 y.o. It is certainly not the oldest OS still in
> >> > development and production.
> >> 
> >> MVS started in 1964. That's 52 years, not 42. Bad day to play hooky from
> >> math class?
> >
> > No, you had a bad day in history class.
> > MVS first shipped in 1974 as OS/VS2 Release 2.
> 
> Oh, I see. You want to play word games.
>

It's not word games. I fully recognize that "OS/VS2 Release 2" *was* a MVS despite not being called so. But "OS/VS2 Release 1" is not a MVS, because it lacks a main feature of MVS - multiple virtual address spaces.

> OS/360 developed into MVS which developed into MVS/XA which developed into
> MVS/ESA which developed into OS/390 which developed into z/OS. It's the
> evolution of the same OS, it's all upward compatible. It's so upward
> compatible you can run object code from OS/360 on today's latest version of
> z/OS.
> 
> Since you failed your computer history class you didn't know that MVS people
> use MVS as a generic name for _all_ these OSs unless we have a reason not
> to. Most of the time we just call it MVS. So does IBM.
> 
> Bob, who started working on MVS in 1975 after MVS was already 11 years old.

Well, I can't compete with you here, back in 1975 I wasn't 11 years old myself.
But calling OS/360 versions before "VS2 Release 1" a MVS is plain wrong. That's like, bringing analogy from DEC world, to refer to RSX-11 as VMS.