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Re: new GA app notes

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In article <e887b111-30f1-4240-b4cf-de619ebf053e@cu1g2000vbb.googlegroups.com>,
Mark Wills  <markrobertwills@yahoo.co.uk> wrote:
>On May 25, 6:28=A0am, Paul Rubin <no.em...@nospam.invalid> wrote:
>> FYI, per the GA tech blog, I see there are a couple of new or revised
>> app notes on the GA site:
>>
>> *http://www.greenarraychips.com/home/documents/greg/AN001-120510-MD5.pdf
>>
>> This is a revision of the earlier MD5 app note, that supplies more
>> detail than the old version. =A0That's a very welcome addition to the
>> scarce amount of existing GA example code, and the exposition is very
>> good, though this still seems like a painful way to do MD5.
>>
>> *http://www.greenarraychips.com/home/documents/greg/AN008-120510-ACCEL...
>>
>> This is about interfacing a 3-axis accelerometer to the GA board,
>> programmed using Polyforth running in a virtual machine on the GA chip.
>> Polyforth puts all its stack, variables, program etc. in external SRAM
>> controlled by GA nodes, with resulting ram cycle time of about 4 mhz. =A0=
>A
>> Polyforth DUP uses two cycles or about 0.5 usec, very slow compared to
>> the GA. =A0The note mentions one can optimize stuff in GA native code, bu=
>t
>> I wonder if there is enough code space for that. =A0The Polyforth code ca=
>n
>> be fairly large, due to the external ram. =A0I wonder what happened to th=
>e
>> eForth which the board supposedly comes with.
>>
>> A couple of other app notes are listed as not yet released:
>>
>> * AN006 Pipelined SHA-256 ... Not Yet Released
>>
>> This sounds interesting. =A0I thought about how to do this back when we
>> were talking about bitcoins, but the implementations I could imagine
>> were all pretty inefficient. =A0So I'm looking forward to seeing how the
>> experts do it.
>>
>> * AN007 A Bit-Banged 10baseT NIC ... Not Yet Released
>>
>> I guess that can be useful for uploading sensor readings, or if you've
>> got a VM-interpreted program processing data. =A0Otherwise even if you ca=
>n
>> do stuff like ethernet frames and checksums in GA software, where will
>> the data come from that will fill actual packets? =A0I guess the 10baseT
>> speed confirms that 100 mbit is out of reach (this question came up in
>> some clf discussion a few weeks ago).
>
>I note with the interest some premlininary information on the F18B on
>the GA website:
>
>http://www.greenarraychips.com/home/documents/roadmap.html
>
>128 words of memory, which is room enough for ~512 instructions, plus
>20 words of stacks.

How is that different from F18A?
64 instructions in RAM
64 instructions in ROM
10 items on data stack
10 items on data return stack

(And the chip could not be claimed upwards compatible, if the size
of the circular stack would change)

Groetjes Albert

--
-- 
Albert van der Horst, UTRECHT,THE NETHERLANDS
Economic growth -- being exponential -- ultimately falters.
albert@spe&ar&c.xs4all.nl &=n http://home.hccnet.nl/a.w.m.van.der.horst

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new GA app notes Paul Rubin <no.email@nospam.invalid> - 2012-05-24 22:28 -0700
  Re: new GA app notes vandys@vsta.org - 2012-05-25 17:30 +0000
    Re: new GA app notes Rimas Avizienis <rimas@cnmat.berkeley.edu> - 2012-06-07 17:10 -0700
  Re: new GA app notes Mark Wills <markrobertwills@yahoo.co.uk> - 2012-06-14 06:08 -0700
    Re: new GA app notes Albert van der Horst <albert@spenarnc.xs4all.nl> - 2012-06-14 18:16 +0000
      Re: new GA app notes Coos Haak <chforth@hccnet.nl> - 2012-06-14 20:04 +0200
      Re: new GA app notes Mark Wills <markrobertwills@yahoo.co.uk> - 2012-06-14 11:58 -0700
        Re: new GA app notes rickman <gnuarm@gmail.com> - 2012-06-14 18:32 -0700
      Re: new GA app notes David Kuehling <dvdkhlng@gmx.de> - 2012-06-21 03:38 +0200
        Re: new GA app notes Paul Rubin <no.email@nospam.invalid> - 2012-06-20 19:27 -0700
          Re: new GA app notes rickman <gnuarm@gmail.com> - 2012-06-21 16:40 -0700
            Re: new GA app notes vandys@vsta.org - 2012-06-21 23:52 +0000
              Re: new GA app notes rickman <gnuarm@gmail.com> - 2012-06-21 17:07 -0700
              Re: new GA app notes rickman <gnuarm@gmail.com> - 2012-06-21 18:10 -0700
                Re: new GA app notes Paul Rubin <no.email@nospam.invalid> - 2012-06-21 19:34 -0700
                Re: new GA app notes rickman <gnuarm@gmail.com> - 2012-06-22 10:38 -0700
                Re: new GA app notes vandys@vsta.org - 2012-06-22 18:17 +0000
                Re: new GA app notes Bernd Paysan <bernd.paysan@gmx.de> - 2012-06-22 22:08 +0200
                Re: new GA app notes Albert van der Horst <albert@spenarnc.xs4all.nl> - 2012-06-22 11:31 +0000
        Re: new GA app notes Albert van der Horst <albert@spenarnc.xs4all.nl> - 2012-06-21 08:46 +0000

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