Just to let everyone know that the Reed Solomon error correction used by the
Nintendo e-Reader has been finally figured out. You can download the first
custom created set of dot codes for the NES game called "BombSweeper" by
SnowBro from http://users.skynet.be/firefly/gba/

In the next few weeks I am probably going to write several Z80 based
e-reader mini-games and release the source code so that anyone who is
interested can write his/her own mini-games too.

Tim

> -----Original Message-----
> From: Damien Good [mailto:d_good@...]
> Sent: donderdag 1 januari 2004 23:17
> To: gbadev@yahoogroups.com
> Subject: Re: [gbadev] Re: e-Reader dissection
>
> although, if the reed solomon encoding/decoding process gets figured out,
> then I am sure a 100% error free raw file can be made from the error free
> bin file.
>
>
> ----- Original Message -----
> From: "Tim Schuerewegen" <Tim.Schuerewegen@...>
> To: <gbadev@yahoogroups.com>
> Sent: Thursday, January 01, 2004 5:43 AM
> Subject: RE: [gbadev] Re: e-Reader dissection
>
>
> > One important thing that people ought to know is that the RAW data is
> not
> > 100% error free. If you would scan/dump the same dotcode over and over
> > again, you will get slightly different RAW data each time. These errors
> get
> > corrected by the Reed-Solomon decoding of the e-Reader and the resulting
> BIN
> > data is therefore error free. Remember this if you decide to print out
> some
> > dotcodes using my printing tool. E.g. if you have printed a dotcode
> based
> on
> > a RAW dump containing lots of errors, then you will add these "printed"
> > errors to your own "scanned" errors and lower the chance of getting a
> > successful read.
> >
> > -----Original Message-----
> > From: Damien Good [mailto:d_good@...]
> > Sent: donderdag 1 januari 2004 13:07
> > To: gbadev@yahoogroups.com
> > Subject: Re: [gbadev] Re: e-Reader dissection
> >
> > more e-reader info at http://www.alpha-ii.com/caitsith2/ereader
> >
> > the released bin/raw data of the e-reader cards might cause controversy,
> but
> > at the same time, the items these cards unlock, can also be unlocked
> with
> an
> > action replay, and the bin/raw data is very similar, that it might help
> > with the reed-solomon code cracking. (heck, the dotcodes on the actual
> > powerup cards look very similar, with only a few bytes in the bin data,
> and
> > maybe 20-60 bytes in the raw data being different.)
> >
> >
> >
> >
> >
> >
> >
> >
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