All,

 Does anyone know what the expected or effective bandwidth of this
 DSO is? or is supposed to be?   If it is less than 1 Mhz, it really
 isn't practical for much of anything except novelty.  If it's >1 Mhz
 but less than 50 Mhz, it should be useful for audio and some non
 critical higher frequency signals.  Ideally, it would be at least 50
 Mhz, but I reaaly doubt that a game machine that costs <$75.00 or so
 is going to be able to handle that speed.  Anyway, just curious.

                                               Regards,

                                                 Jim




On Mon, 02 October 2000, Bob Ammerman wrote:

>
> <SOAPBOX>
>
> The question is being avoided:
>
> Can one _legally_ copy that EPROM?
>
> This isn't really a question of morality or Elektor's business practices.
>
> </SOAPBOX>
>
> Bob Ammerman
> RAm Systems
> (contract development of high performance, high function, low-level
> software)
>
> ----- Original Message -----
> From: Michael Rigby-Jones <mrjones@NORTELNETWORKS.COM>
> To: <PICLIST@MITVMA.MIT.EDU>
> Sent: Monday, October 02, 2000 7:53 AM
> Subject: Re: [EE]: Oscilloscope
>
>
> > > > >build them. I really hope they are going to do a PCB for this.  The
> > > only
> > > > >downside is I can almost guarantee that the code will not be
> published,
> > > you
> > > > >will have to buy a pre-programmed eprom from them.
> > > >
> > > > As the code is in a 27256 series eprom you should need to buy only one
> > > and share the cost among the group of mates all wanting to build it. It
> > > does not use any micro on the ROM board that makes the gameboy into an
> > > oscilloscope - it uses the gameboy processor as a DSP.
> > >
> > >
> > > -----Original Message-----
> > > From: Martin Hill [SMTP:eaxmjhi@NOTTINGHAM.AC.UK]
> > > Sent: Monday, October 02, 2000 1:38 PM
> > > To:   PICLIST@MITVMA.MIT.EDU
> > > Subject:      [EE]: Oscilloscope
> > >
> > > Is this code available for free?  If not, then isn't what you are
> > > suggesting just what people complain about everytime somebody
> > > asks how to get around the code protection on a PIC?  Apologies if
> > > I have got the wrong end of the stick.
> > >
> > > Martin
> > >
> > I guess (as with the PIC thing) it depends on what side of the fence you
> are
> > sitting on.  Elektor obviously want to make as much money as they can out
> of
> > the article, and therefore charge a small fortune for the PCB and a
> > pre-programmed EPROM.  However, as a (potential) constructor, I think it's
> a
> > little short sighted no to publish the code.  Building a project such as
> > this should be fun and have at least some kind of educational value,
> > otherwise there's not a lot of point in building it.  Certainly the specs
> of
> > the scope, coupled with the cost of a Gameboy if you don't have one
> wouldn't
> > IMO make it worth building for use as a serious tool.  I suspect
> publishing
> > the code wouldn't make a huge dent in their chip sales, a lot of amateurs
> > who may be tempted to build this will not have sutiable programmers, but
> > having the code available makes the investment in building the unit far
> more
> > worthwhile.  As well as learning from code you have the possibility to
> > modify it for your own requirements, or to improve it.
> >
> > I personally think that although Elektor is generaly a quality magazine,
> by
> > their business decisions they aim these kind of projects above the heads
> of
> > most amateurs.
> >
> > Mike
> >
> > --
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> >
> >
>
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jim@jpes.com

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