Re: Industrial Single Board Forth Computer - recommendations?

From	Paul Rubin <no.email@nospam.invalid>
Newsgroups	comp.lang.forth
Subject	Re: Industrial Single Board Forth Computer - recommendations?
Date	2015-06-24 16:37 -0700
Organization	A noiseless patient Spider
Message-ID	<87wpyswudg.fsf@nightsong.com> (permalink)
References	(7 earlier) <mmc5k6$5d8$1@dont-email.me> <87lhfaxik6.fsf@nightsong.com> <mmehg9$rf5$1@dont-email.me> <87616cyde1.fsf@nightsong.com> <mmfbec$91c$1@dont-email.me>

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rickman <gnuarm@gmail.com> writes:
> The guy building the BBB has a tight connection with TI, so I'm sure
> he has an assurance from TI that this chip will be around.

That's good to hear.

> Think about it a bit, do cell phones need an HDMI output?
> My understanding is that the rPi CPU was intended for settop boxes,
> hence the HDMI output.

Some cell phones and many tablets do have HDMI.  I don't know what

> Apples and oranges.  I don't get your point.  My understanding is the
> only part of the BCM2835 that is not fully documented is the GPU which
> is very common on such chips.

The BCM GPU is not just non-fully documented, it's actually secret :(.
By badly documented though, I meant there is documentation but it has
gaps and errors, edge cases and bugs not described, etc.  For
commodity-ish parts where there's a larger number of smaller customers
making support calls when the docs don't suffice, there's greater effort
to document thoroughly.

> The "ARM7" chips you talk about are really CM3 and CM4 devices and
> don't typically have GPUs.  They also run some 10 times slower than
> the larger chips and are targeted to very different apps.

The ones we used (I don't know the part numbers) had MMU's and needed
external memory and flash and we ran Linux on them.  Actually it may
have been an ARM6.  This is not the board we used but it was along these
lines:

  http://www.glomationinc.com/products/index.php?n=SBC.GESBC-9G20w

Those M3/M4's are generally MCU's with flash and ram on the chip and are
very different.  I never ran serious computational benchmarks on the 300
mhz ARM but 10x slower than the BBB is conceivable (if I had to guess
I'd say 5x based on mhz and architecture).  It was much more than 10x
slower than the x86 laptop that I cross-developed from, though the
kernel thread switching time was maybe only maybe 2x slower (I measured
that but don't remember the numbers).  300 mhz is still stupendously
fast compared to old PC's/industrial boards and current 8-bitters.  Can
I ask what your application is?

> What envelope?  I don't think anyone considers the BBB or rPi to be
> bleeding edge.

They may have been closer to it when they were first introduced.

Thread

Industrial Single Board Forth Computer - recommendations? Howerd <howerdo@yahoo.co.uk> - 2015-06-17 04:35 -0700
  Re: Industrial Single Board Forth Computer - recommendations? Mark Wills <markwills1970@gmail.com> - 2015-06-17 05:21 -0700
  Re: Industrial Single Board Forth Computer - recommendations? Raimond Dragomir <raimond.dragomir@gmail.com> - 2015-06-17 08:57 -0700
  Re: Industrial Single Board Forth Computer - recommendations? Jason Damisch <jasondamisch@yahoo.com> - 2015-06-17 10:58 -0700
  Re: Industrial Single Board Forth Computer - recommendations? Jan Coombs <Jan-54 <jenfhaomndgfwutc@murmic.plus.com>> - 2015-06-17 22:39 +0100
    Re: Industrial Single Board Forth Computer - recommendations? Raimond Dragomir <raimond.dragomir@gmail.com> - 2015-06-17 23:10 -0700
      Re: Industrial Single Board Forth Computer - recommendations? rickman <gnuarm@gmail.com> - 2015-06-18 16:24 -0400
  Re: Industrial Single Board Forth Computer - recommendations? rickman <gnuarm@gmail.com> - 2015-06-18 16:17 -0400
    Re: Industrial Single Board Forth Computer - recommendations? Howerd <howerdo@yahoo.co.uk> - 2015-06-20 07:49 -0700
      Re: Industrial Single Board Forth Computer - recommendations? Raimond Dragomir <raimond.dragomir@gmail.com> - 2015-06-20 09:36 -0700
        Re: Industrial Single Board Forth Computer - recommendations? Howerd <howerdo@yahoo.co.uk> - 2015-06-20 13:40 -0700
      Re: Industrial Single Board Forth Computer - recommendations? rickman <gnuarm@gmail.com> - 2015-06-20 13:00 -0400
        Re: Industrial Single Board Forth Computer - recommendations? Howerd <howerdo@yahoo.co.uk> - 2015-06-20 11:13 -0700
          Re: Industrial Single Board Forth Computer - recommendations? rickman <gnuarm@gmail.com> - 2015-06-20 15:04 -0400
        Re: Industrial Single Board Forth Computer - recommendations? Paul Rubin <no.email@nospam.invalid> - 2015-06-20 20:25 -0700
          Re: Industrial Single Board Forth Computer - recommendations? Paul Rubin <no.email@nospam.invalid> - 2015-06-20 20:34 -0700
          Re: Industrial Single Board Forth Computer - recommendations? rickman <gnuarm@gmail.com> - 2015-06-23 09:40 -0400
            Re: Industrial Single Board Forth Computer - recommendations? Raimond Dragomir <raimond.dragomir@gmail.com> - 2015-06-23 08:29 -0700
              Re: Industrial Single Board Forth Computer - recommendations? rickman <gnuarm@gmail.com> - 2015-06-23 13:40 -0400
                Re: Industrial Single Board Forth Computer - recommendations? Paul Rubin <no.email@nospam.invalid> - 2015-06-23 13:42 -0700
                Re: Industrial Single Board Forth Computer - recommendations? Raimond Dragomir <raimond.dragomir@gmail.com> - 2015-06-24 07:11 -0700
                Re: Industrial Single Board Forth Computer - recommendations? rickman <gnuarm@gmail.com> - 2015-06-24 11:15 -0400
                Re: Industrial Single Board Forth Computer - recommendations? Raimond Dragomir <raimond.dragomir@gmail.com> - 2015-06-24 10:16 -0700
                Re: Industrial Single Board Forth Computer - recommendations? rickman <gnuarm@gmail.com> - 2015-06-24 17:54 -0400
                Re: Industrial Single Board Forth Computer - recommendations? Paul Rubin <no.email@nospam.invalid> - 2015-06-24 15:01 -0700
                Re: Industrial Single Board Forth Computer - recommendations? rickman <gnuarm@gmail.com> - 2015-06-24 18:38 -0400
                Re: Industrial Single Board Forth Computer - recommendations? Paul Rubin <no.email@nospam.invalid> - 2015-06-24 16:37 -0700
                Re: Industrial Single Board Forth Computer - recommendations? rickman <gnuarm@gmail.com> - 2015-06-24 21:01 -0400
                Re: Industrial Single Board Forth Computer - recommendations? Paul Rubin <no.email@nospam.invalid> - 2015-06-26 12:58 -0700
      Re: Industrial Single Board Forth Computer - recommendations? Paul Rubin <no.email@nospam.invalid> - 2015-06-20 12:24 -0700
        Re: Industrial Single Board Forth Computer - recommendations? Howerd <howerdo@yahoo.co.uk> - 2015-06-20 14:03 -0700
          Re: Industrial Single Board Forth Computer - recommendations? Paul Rubin <no.email@nospam.invalid> - 2015-06-20 15:03 -0700
          Re: Industrial Single Board Forth Computer - recommendations? Raimond Dragomir <raimond.dragomir@gmail.com> - 2015-06-21 01:33 -0700
            Re: Industrial Single Board Forth Computer - recommendations? rickman <gnuarm@gmail.com> - 2015-06-23 09:47 -0400
  Re: Industrial Single Board Forth Computer - recommendations? darek.maksimiuk@gmail.com - 2015-06-30 13:52 -0700
    Re: Industrial Single Board Forth Computer - recommendations? visualforth@rocketmail.com - 2015-07-01 10:45 -0700
      Re: Industrial Single Board Forth Computer - recommendations? Howerd <howerdo@yahoo.co.uk> - 2015-07-01 15:01 -0700
        Re: Industrial Single Board Forth Computer - recommendations? visualforth@rocketmail.com - 2015-07-01 18:14 -0700
          Re: Industrial Single Board Forth Computer - recommendations? Mark Wills <markwills1970@gmail.com> - 2015-07-02 00:49 -0700
            Re: Industrial Single Board Forth Computer - recommendations? Howerd <howerdo@yahoo.co.uk> - 2015-07-02 03:02 -0700

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