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Subject: Re: is there a version of unix written in Ada
From: Shark8 <onewingedshark@gmail.com>
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Xref: reader02.eternal-september.org comp.lang.ada:60402
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On Thursday, October 1, 2020 at 3:36:40 PM UTC-6, Brian Drummond wrote:
> On Wed, 30 Sep 2020 21:42:21 +0200, Dmitry A. Kazakov wrote: 
> 
> > On 30/09/2020 19:27, Paul Rubin wrote: 
> >> "Dmitry A. Kazakov" writes: 
> >>> OK, but that again is rather retrograde, MS-DOS pops into my mind 
> >>> (:-)). 
> >> 
> >> MSDOS had no memory protection at all, and was basically single 
> >> tasking. 
> >> Singularity had the limitation that you were only allowed to use 
> >> trusted compilers, but in exchange it gave an interesting approach to 
> >> programming high performance multiprocessor systems. 
> > 
> > Put a trusted compiler into MS-DOS, where is a difference? Tasking would 
> > be up to the compiler's run-time, obviously. 
> > 
> > I want an OS protecting from compilers I do not trust without 
> > performance loss. Static checks must be enforced at run-time.
> Maybe I should knock together a new Linn Rekursiv on an FPGA. 
> https://en.wikipedia.org/wiki/Rekursiv 
> 
> Objects were essentially memory segments, together with their own object 
> number, type, size : static checks happened in parallel with operations. 
> Even inheritance was handled below the instruction set level (in 
> microcode) 
> 
> -- Brian
There are some really interesting things about the Rekursiv, and I'd be interested in both the FPGA project, as well as possibly taking inspiration from it (and a few other architectures).