Re: Installing 360 games

In article <6ol2kvF464e9U2@xxxxxxxxxxxxxxxxxx>,
Gareth Halfacree <usenet@xxxxxxxxxxxxxxx> wrote:
Kendrick Kerwin Chua wrote:
I don't agree on this point, largely based on Sega deviating from ISO9660
when they made the Saturn disk format. Having extra data pressed in the
area outside of the last track gave them the ability to identify the
region and the developer of a game in a fashion that didn't require the
actual code in the data portion of the disk to be any different. It might
not be unfeasible to press a run of blank disks that use this area for
unique IDs, and are therefore each unique. Then you press identical data
on each of them with the usual manufacturing method.

But how would this work - you'd need a unique master for each 'unique'
disc. Sega could do it because they /did/ have a separate master for
each region and developer, but they certainly didn't have a master for
each /copy/.

Pressing relies on making an exact duplicate of the master - you're
literally 'pressing' the glass master onto the blank disc to make an
impression. There's no way to change the contents of a pressed disc
without changing the master.

You'd need some sort of dynamic mastering process. Since it's only for the
one track, you could probably adapt the archival CD-R technology for just
that one track, and the press the rest of the disk the traditional way.
Making it laser-based would also make replacing bad pressings easier, as
you'd just do one-off blank production out of sequence.

I'll be the first to admit that it's still an absurd idea. Nobody makes
200,000 unique, slightly differentiated things in a factory. At the
Franklin Mint, maybe.

-KKC, hunting down CDi games.
--
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