Re: GCR <--CP/M --> MS-DOS and vice versa?

[david@uow.edu.au (David Wilson)]

Matthew Montchalin <mmontcha@OregonVOS.net> writes:

>On Fri, 7 Mar 2003, Bill Garber wrote:
>|> > A better comparison is a DVD/CD compared to a 45 record
>|> > both about the same size with cylinders or a spiral
>|> > but neither is hardware compatible.
>|>
>|> DVDs, CDs and 45 records all use a spiral not cylinders.
>|>
>|> Charlie
>|
>|What?!, DVD and CD use spiral? What about the 650 mb floppy
>|you can make on a CD writer with CD/RW disks? Are they also
>|spiral? I think not.

>The DVD is a spiral, I thought?  But the CD used more or less
>circular tracks.

Yes, the CD-R and CD-RW discs are spirals. There is a groove
in the substrate that the CD writer can follow so that it knows
where to write. The 650MB you make with DirectCD or InCD is still
a spiral but written in packet format rather than a single continuous
track.

>|Anyway, where can I read about that? I never heard that before.

Just do a web search (google or altavista) looking for keywords
like CD FAQ packet writing.
--
David Wilson  School of IT & CS, Uni of Wollongong, Australia