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Re: What is TI PRU-ICSS processor core?

Newsgroups comp.arch.embedded
Date 2019-08-27 00:39 -0700
References <0e7b1a2c-7dde-4c94-9d82-32b633417df8@googlegroups.com> <87d0grisir.fsf@nightsong.com> <f57327fd-3822-431d-8d2d-1281e0b9bdc5@googlegroups.com> <878srfhxx4.fsf@nightsong.com>
Message-ID <bd838331-e771-4804-86f0-df0e770cb671@googlegroups.com> (permalink)
Subject Re: What is TI PRU-ICSS processor core?
From Rick C <gnuarm.deletethisbit@gmail.com>

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On Tuesday, August 27, 2019 at 3:26:04 AM UTC-4, Paul Rubin wrote:
> Rick C <gnuarm.deletethisbit@gmail.com> writes:
> > By "legacy" part you mean the first TI ARM that used it?  Or did it
> > come from an unrelated design?
> 
> I don't know its origins but just looking at its instruction set, it
> seems to come from an earlier era of cpu design than what we usually
> deal with today.  Its heritage may have been in industrial automation
> rather than computing.  It's not my area but I think PLC's originally
> didn't have the features of normal microprocessors, but gradually
> acquired them, and now they have normal microprocessors inside.

Maybe the instruction set is optimized for it's application and construction.  I haven't looked at it in detail, but I've been told it isn't intended to be general purpose.  

I'm pretty sure they aren't from PLCs. 

-- 

  Rick C.

  + Get 1,000 miles of free Supercharging
  + Tesla referral code - https://ts.la/richard11209

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Thread

What is TI PRU-ICSS processor core? Dave Nadler <drn@nadler.com> - 2019-08-26 05:23 -0700
  Re: What is TI PRU-ICSS processor core? Paul Rubin <no.email@nospam.invalid> - 2019-08-26 13:25 -0700
    Re: What is TI PRU-ICSS processor core? Rick C <gnuarm.deletethisbit@gmail.com> - 2019-08-27 00:19 -0700
      Re: What is TI PRU-ICSS processor core? Paul Rubin <no.email@nospam.invalid> - 2019-08-27 00:25 -0700
        Re: What is TI PRU-ICSS processor core? Rick C <gnuarm.deletethisbit@gmail.com> - 2019-08-27 00:39 -0700
          Re: What is TI PRU-ICSS processor core? David Brown <david.brown@hesbynett.no> - 2019-08-27 09:52 +0200
    Re: What is TI PRU-ICSS processor core? Dave Nadler <drn@nadler.com> - 2019-08-27 12:38 -0700

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