Re: Writing images in substrate
>From: Len Sorensen <[EMAIL PROTECTED]> >I suspect it would require very detailed knowledge of the media and >drive, and probably require manually doing all the ECC data as well, >if you want to be able to do an image. What Yamaha did was neat, but >not very practical I suspect. I certainly don't imagine it doable in >general on generic hardware. Yamaha added a chip to circumvent the EFM modulator which is intended to _prevent_ the possibility to create visible images. Jörg EMail:[EMAIL PROTECTED] (home) Jörg Schilling D-13353 Berlin [EMAIL PROTECTED] (uni) If you don't have iso-8859-1 [EMAIL PROTECTED] (work) chars I am J"org Schilling URL: http://www.fokus.gmd.de/usr/schilling ftp://ftp.fokus.gmd.de/pub/unix -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Writing images in substrate
>From: [EMAIL PROTECTED] >I'm sure everybody has seen the Slashdot article about the Yamaha drive >that write images, etc in the part of a CDR/CDRW in the unused space >that's viewable by the naked eye >(http://slashdot.org/article.pl?sid=02/06/24/1227200&tid=126). I didn't >see this in the archives, so I was wondering if there's any interest or >development on this type of thing for "regular" CDR/CDRW drives? >Would it be as simple as turning on the laser to burn the parts of the >disk that you would want to appear different? Then it just needs to be >figured out how to get everything lined up as you move toward the outside >of the disk. (Gross simplification. I don't remember most of those angle >formulas from math class.) Yamaha did show the one and only drive at CeBIT and I did talk to the developers. Is the drive really available? At CeBIT they stated that they show it to see if there is interest. There is must likely some image-format interface. Jörg EMail:[EMAIL PROTECTED] (home) Jörg Schilling D-13353 Berlin [EMAIL PROTECTED] (uni) If you don't have iso-8859-1 [EMAIL PROTECTED] (work) chars I am J"org Schilling URL: http://www.fokus.gmd.de/usr/schilling ftp://ftp.fokus.gmd.de/pub/unix -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Writing images in substrate
On Thu, Jun 27, 2002 at 03:58:06PM -0500, [EMAIL PROTECTED] wrote: > I'm sure everybody has seen the Slashdot article about the Yamaha drive > that write images, etc in the part of a CDR/CDRW in the unused space > that's viewable by the naked eye > (http://slashdot.org/article.pl?sid=02/06/24/1227200&tid=126). I didn't > see this in the archives, so I was wondering if there's any interest or > development on this type of thing for "regular" CDR/CDRW drives? > > Would it be as simple as turning on the laser to burn the parts of the > disk that you would want to appear different? Then it just needs to be > figured out how to get everything lined up as you move toward the outside > of the disk. (Gross simplification. I don't remember most of those angle > formulas from math class.) I suspect it would require very detailed knowledge of the media and drive, and probably require manually doing all the ECC data as well, if you want to be able to do an image. What Yamaha did was neat, but not very practical I suspect. I certainly don't imagine it doable in general on generic hardware. Len Sorensen -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]