Re: e8th prototype hardware!

From	Paul Rubin <no.email@nospam.invalid>
Newsgroups	comp.lang.forth
Subject	Re: e8th prototype hardware!
Date	2016-05-12 23:59 -0700
Organization	A noiseless patient Spider
Message-ID	<87oa8a4f4t.fsf@jester.gateway.pace.com> (permalink)
References	(5 earlier) <nh2imo$2h6$1@dont-email.me> <nh2v1d$lrp$1@dont-email.me> <8760ui6gh5.fsf@jester.gateway.pace.com> <nh32hs$vvg$1@dont-email.me> <c72e3745-b0ee-4bb4-945e-cf79d359f898@googlegroups.com>

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Raimond Dragomir <raimond.dragomir@gmail.com> writes:
> Here are some insights about the e8th board: ..

Oh cool, thanks for this info.  Are you involved with the hw design?

> - Completely industrial temp (-40C..+85C)

Nice!  Despite the name "raspberry pi" you are not supposed to actually
bake them, i.e. the rpi's temp range is much lower.

> - RTC and backup SRAM on a coin CR2032 cell type

This is important for lots of things and I can't understand why so many
otherwise good boards omit it

> - SDRAM 8Mx16 (16MBytes) at 100MHz (on the back side, right under the cpu).
> - 8MBytes quad-spi serial flash.

Cool, any reason to not use a 16mb qspi flash?  They are cheap...  Also
is there any eeprom in the system?  Either on the chip or off.  Even a
smallish amount like a few dozen bytes can be very useful.

> - ethernet 10/100.

Really needed?  I guess it can be useful, and can be turned off to save
power.

> Power supply input: 5VDC only.

Hmm, lipo power would have been useful.

The $0.64 question: consider the loop

  : test 0  begin 1+ again ;

or the 8th equivalent.  I.e. just count upwards forever.

How much power does the board use while this loop is running?  What
about with heavier processing such as crypto or floating point?

> There is an user button and an user led.

Nice.

> The board is not something very special. It is intended to be a simple
> design

I realize these 2 comments are exactly the opposite of each other, but:
1) there are so many boards in this category, why bother with another?

   and

2) this board seems nicely thought out, and gets lots of simple things
right that other boards manage to miss.

Anyway, well done, I could imagine using them for various purposes.

Thread

e8th prototype hardware! Ron Aaron <rambamist@gmail.com> - 2016-05-12 12:01 +0300
  Re: e8th prototype hardware! Paul Rubin <no.email@nospam.invalid> - 2016-05-12 09:03 -0700
    Re: e8th prototype hardware! Ron Aaron <rambamist@gmail.com> - 2016-05-12 19:19 +0300
      Re: e8th prototype hardware! Cecil Bayona <cbayona@cbayona.com> - 2016-05-12 12:44 -0500
        Re: e8th prototype hardware! Ron Aaron <rambamist@gmail.com> - 2016-05-12 20:48 +0300
          Re: e8th prototype hardware! rickman <gnuarm@gmail.com> - 2016-05-12 13:57 -0400
            Re: e8th prototype hardware! Paul Rubin <no.email@nospam.invalid> - 2016-05-12 11:04 -0700
        Re: e8th prototype hardware! Paul Rubin <no.email@nospam.invalid> - 2016-05-12 10:53 -0700
          Re: e8th prototype hardware! Cecil Bayona <cbayona@cbayona.com> - 2016-05-12 13:43 -0500
            Re: e8th prototype hardware! rickman <gnuarm@gmail.com> - 2016-05-12 18:14 -0400
              Re: e8th prototype hardware! Paul Rubin <no.email@nospam.invalid> - 2016-05-12 15:47 -0700
                Re: e8th prototype hardware! rickman <gnuarm@gmail.com> - 2016-05-12 19:14 -0400
                Re: e8th prototype hardware! Raimond Dragomir <raimond.dragomir@gmail.com> - 2016-05-12 23:38 -0700
                Re: e8th prototype hardware! Paul Rubin <no.email@nospam.invalid> - 2016-05-12 23:59 -0700
                Re: e8th prototype hardware! Raimond Dragomir <raimond.dragomir@gmail.com> - 2016-05-13 00:16 -0700
                Re: e8th prototype hardware! Ron Aaron <rambamist@gmail.com> - 2016-05-13 10:31 +0300
                Re: e8th prototype hardware! Paul Rubin <no.email@nospam.invalid> - 2016-05-13 01:23 -0700
                Re: e8th prototype hardware! Raimond Dragomir <raimond.dragomir@gmail.com> - 2016-05-13 02:08 -0700
                Re: e8th prototype hardware! rickman <gnuarm@gmail.com> - 2016-05-13 10:42 -0400
                Re: e8th prototype hardware! Raimond Dragomir <raimond.dragomir@gmail.com> - 2016-05-13 08:36 -0700
                Re: e8th prototype hardware! rickman <gnuarm@gmail.com> - 2016-05-13 11:57 -0400
                Re: e8th prototype hardware! Paul Rubin <no.email@nospam.invalid> - 2016-05-14 12:53 -0700
                Re: e8th prototype hardware! Bernd Paysan <bernd.paysan@gmx.de> - 2016-05-14 21:41 +0000
                Re: e8th prototype hardware! rickman <gnuarm@gmail.com> - 2016-05-15 00:08 -0400
                Re: e8th prototype hardware! Raimond Dragomir <raimond.dragomir@gmail.com> - 2016-05-14 21:46 -0700
                Re: e8th prototype hardware! rickman <gnuarm@gmail.com> - 2016-05-15 09:37 -0400
                Re: e8th prototype hardware! Raimond Dragomir <raimond.dragomir@gmail.com> - 2016-05-15 07:26 -0700
                Re: e8th prototype hardware! rickman <gnuarm@gmail.com> - 2016-05-15 11:26 -0400
                Re: e8th prototype hardware! Raimond Dragomir <raimond.dragomir@gmail.com> - 2016-05-15 09:20 -0700
                Re: e8th prototype hardware! rickman <gnuarm@gmail.com> - 2016-05-15 17:17 -0400
                Re: e8th prototype hardware! Raimond Dragomir <raimond.dragomir@gmail.com> - 2016-05-15 22:10 -0700

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