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From: russ lyttle <lyttlec@removegmail.com>
Newsgroups: comp.lang.ada
Subject: Re: Why couldn't an operating system be written in ada
Date: Wed, 27 Feb 2019 01:20:39 -0500
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Date: 2019-02-27T01:20:39-05:00
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On 2/26/19 9:00 PM, Dennis Lee Bieber wrote:
> On Tue, 26 Feb 2019 18:32:12 -0500, lyttlec <lyttlec@removegmail.com>
> declaimed the following:
> 
>> Often overlooked is that any "C-esque" POSIX compliant OS turns the
>> computer into a VAX. C was written to be easily translated into VAX
>> machine code and POSIX signals are all the original interrupts on a VAX.
>> If you have a CISC computer running VMS, C is your language.
> 
> 	Pardon? The C language predates the VAX architecture by over half a
> decade, if not more. The language was created ~1972 (as a derivative of
> BCPL via the language B); it was PDP-7, followed by PDP-11.
> 
> 	The VAX-11/780 was released near the end of 1977.
> 
> 	Oh, and the high-level systems language used for the VMS OS just
> happens to be BLISS https://en.wikipedia.org/wiki/BLISS .
> 
> 	Both predate POSIX (1988).
> 
> 
That is all true. You could make the case that C turns your computer 
into a PDP-11. I was being generous.