On 31/01/11 21:25, Dawn Wolthuis wrote:
> PrimeOS was originally written in Fortran (then later I thought it was
> C -- was it PL/I?)  --dawn

As someone (as a customer) who dabbled in this stuff, the original
versions of Primos were written in FORTRAN - which is why all Primes
came with FTN included.

I'm not sure at what point (before my time, probably the switch from the
100 series to the 50 series, rev 15?), new stuff was written in PL/1.
Condition handling was well entrenched in Primos by the time I knew it,
and that came straight out of PL/1. Much better than C++'s exception
throwing, imho. But all the PL/1 code in Primos was written to compile
with either PLP or SPL (their two subsets of PL/1), and again the
compilers were provided free with Primos. I think it was SPL I used to
write my code, that I gave to Prime. I don't remember ever seeing it
appear as part of Primos though :-)

I think the C code only really started to appear with the 386/MIPS boxes
that ran Unix, about the time of rev 21 or 22. Certainly I don't
remember hearing about any C code in rev 19, which was a *major* change
from 18 before it. I never knew of Primos coming with a C compiler.

Cheers,
Wol
> 
> On Mon, Jan 31, 2011 at 2:52 PM, Clive Hills <discordia...@gmail.com> wrote:
>> I note that PrimOS written by Prime was done in later iterations in PL/1.
>> Projects like UV/UD and others originated on Prime.
>> I think it's likely that some knowledge of PL/I existed.
>> Clive
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> 
> 
> 

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