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e-Reader dissection   Message List  
Reply | Forward Message #14537 of 15019 |
Re: [gbadev] Re: e-Reader dissection


(just few personal opinion notes on e-reader, no facts)

> There are scanner/printer combos now that do 4800DPI (or claim
> to), and if you give them expensive enough glossy paper the
> print might be clean enough to scan into the e-reader. My
The e-reader itself can't have too much DPI IMHO, it has to be cheap? Or
not?

> trial and error and be able to publish stuff that way, I'm not
> sure how much encryption they could really be doing on the fly
> with a 16MHz processor.
Why on the fly? The amount of data on the card is very small (few kb, I
forgot the numbers, but somebody wrote it here in gbadev), it could be
easily copied into RAM and than decoded and than used. Or am I missing
some point about the usage of e-cards? (I'm not sure, how they works, if
the game needs to react instantly on the card, or has time to decypher
data)
Anyway, I bet the sw side of thing would be broken quite soon, if
somebody would take the care, thw hw side looks harder at the moment.

PED - Peter Helcmanovsky - wishing to have 48h days
Braniskova 7 Kosice 04001 Slovakia / phone +420 721308701
(_ -- actually in Brno, so don't look after me --
"~/\~" -=- deRATized RAT -=- Being beyond Yer imagination -=-
,_oo_, 7 GODS demo group WWW pages: http://7gods.sk
`'




Thu Oct 2, 2003 4:09 pm

ped7g
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Message #14537 of 15019 |
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... There are scanner/printer combos now that do 4800DPI (or claim to), and if you give them expensive enough glossy paper the print might be clean enough to...
Rob Kudla
raindog469
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Oct 2, 2003
3:42 pm

(just few personal opinion notes on e-reader, no facts) ... The e-reader itself can't have too much DPI IMHO, it has to be cheap? Or not? ... Why on the fly?...
Ped
ped7g
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Oct 3, 2003
3:47 pm

... I was thinking more along the lines of cheap inkjets not producing enough contrast at the edge of the dots. I actually have no idea how 2-dimensional...
Rob Kudla
raindog469
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Oct 4, 2003
11:59 am

... The best I have had with trying to print, was a read error, meaning some of the codes were scannable in the e-reader, and some of them were not. If only...
caitsith6502
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Oct 5, 2003
8:41 pm

... DMCA ?! *evil laughter* ... whatever you do, i'd start with looking at US patents - the barcode N uses for gamecube disc authentification is patented and...
Groepaz
groepaz2000
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Oct 5, 2003
10:21 pm

... From all the dot code related patents I have looked at so far (~30), the most interesting one is US patent 6116507. Search on ...
Tim Schuerewegen
firefly0072001
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Oct 5, 2003
10:52 pm

... mmmh there was also a simelar site for european and japan patents... (google should find it for you :=P). didnt have much luck there previously either, but...
Groepaz
groepaz2000
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Oct 5, 2003
11:06 pm

If print quality is a problem then write a program to generate the output to a tiff file. The file can then be taken a professional graphic arts shop and they...
Daniel
webmaster@...
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Oct 3, 2003
1:31 pm

Here's how to e-reader works for the most part. After plugging the E-Reader into the GBA as if it were a cartridge, turn on your GBA. Then you'll go into some...
pkmndata
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Oct 4, 2003
12:00 pm

I got a package fro ups the other day which has a small label that looks just like the code on an e-reader card (Not the usual clustered mess of a label). ...
webmaster
webmaster@...
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Oct 4, 2003
9:05 pm

It would probably be much easier to just disassemble the e-reader rom to find out exactly how it works. I'm assuming this would be much easier than staring at...
TJ
treyjazz2k2
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Oct 4, 2003
9:06 pm

I tried to decipher the e-Reader dotcodes last year by staring at the dots but had to give up, all those dots were starting to give me a headache :/ Here is a...
Tim Schuerewegen
firefly0072001
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Oct 5, 2003
12:54 pm

... the dots ... headache :/ ... the dotcode ... Maybe you could write something to output a higher quality error free dot code image, that might actually...
caitsith6502
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Oct 5, 2003
8:53 pm

... An error free dot code image? You mean something like http://users.skynet.be/firefly/gba/e-reader/slp100.bmp :) Btw, I printed it on a label using my Seiko...
Tim Schuerewegen
firefly0072001
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Oct 8, 2003
2:47 pm

Sunday, September 28, 2003, 9:44:04 AM, you wrote: DA> I posted some time ago regarding need for an e-Reader dissection. All DA> the leads that turned up as a...
Leonid Zaprudsky
leprud@...
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Oct 8, 2003
2:46 pm

That might have something to do with the fact that the dot code is 360 dpi ... -Stephen ... From: "Tim Schuerewegen" <Tim.Schuerewegen@...> To:...
Stephen Stair
sgstair
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Oct 8, 2003
6:26 pm

Pretty much. The dots should have some white space between them. Also, can you provide me that same image, but in 1200 DPI, length = 7.3cm, width = 0.3cm?...
Damien Good
caitsith6502
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Oct 8, 2003
6:30 pm

that image is dot-accurate :) you can easily do image processing on it to attain the correct size. -Stephen ... From: "Damien Good" <d_good@...> To:...
Stephen Stair
sgstair
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Oct 9, 2003
7:45 am

Still no luck in getting a successful printout. ... From: "Stephen Stair" <sgstair@...> To: <gbadev@yahoogroups.com> Sent: Wednesday, October...
Damien Good
caitsith6502
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Oct 9, 2003
11:31 am

Me either... I compared the printout of mine to another dot code though, and see it's a little bit smaller... I wonder if maybe it's not 360dpi (As I suspect),...
Stephen Stair
sgstair
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Oct 10, 2003
1:45 pm

... I had to print it at 344dpi on my HP DeskJet 3650 (brand new) to get the correct size. Tim...
Tim Schuerewegen
firefly0072001
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Oct 11, 2003
2:54 am

Did the printout scan and work? ... 3650 (brand new) to get the...
Daniel
webmaster@...
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Oct 11, 2003
8:24 am

... No, it did not. I guess the 203 DPI dotcode was too large for the e-Reader because the quality was perfect. Now some good news ... I bought a HP DeskJet...
Tim Schuerewegen
firefly0072001
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Oct 12, 2003
9:05 pm

Well as I said I would here is my effort to stimulate our efferts to understand how to use the e-Reader to 'play our code'.. A cash prize is now offered for...
Daniel
webmaster@...
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Oct 12, 2003
9:07 am

Cool Tim, keep up the good work. Did you see that website posted in the previous topic? They're offering 300 big ones ($300) to anyone who can figure out how...
pkmndata
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Oct 13, 2003
4:30 pm

... Pfff.. I'm doing this just for fun, not for the money, have plenty of that already. However, still great for someone to offer that money....
Tim Schuerewegen
firefly0072001
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Oct 14, 2003
2:25 pm

http://www.alpha-ii.com/caitsith2/ereader/dot-code%20block.jpg - explanation on how the raw data is stored in the dotcode blocks in the strip. Now, the only...
Damien Good
caitsith6502
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Dec 31, 2003
11:12 am

I just released a bit of e-reader information too, including a dotcode printing tool (some ppl already have it), more to follow soon... ...
Tim Schuerewegen
firefly0072001
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Jan 1, 2004
11:06 am

Sgstair was telling me that they have downloaded the code and are looking at it. He can tell you how to access that data.. ... From: "Damien Good"...
Daniel
webmaster@...
Send Email
Dec 31, 2003
5:25 pm

"they"? "code"? "data"? ... From: Daniel [mailto:webmaster@...] Sent: woensdag 31 december 2003 16:30 To: gbadev@yahoogroups.com Subject: Re:...
Tim Schuerewegen
firefly0072001
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Jan 1, 2004
11:07 am
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