🚀 go-pugleaf

In article <sehari.827706428@eng3.iastate.edu>, sehari@iastate.edu (Babak $ehari) writes:
|> ----
|> 
|> I am looking for a book or other informative material about reading
|> and writing tracks of a CD-ROM.  Can I do it with BIOS only or do I
|> need DOS?  Is it any different from reading and writing regular floppy
|> or hard disks?!
|> 
|> I Like to do this in C or C++, if there is any good library that can
|> read or write sectors/tracks of CD-ROM.  If that is not
|> possible, I like to know about BIOS INT or DOS INT that does this.
|> 
|> Any good assembly books that talks about this subject?
|> 
|>                             With highest regards,
|>                                  Babak   Sehari.
|> 

I suggest you look at the MSCDEX documentation.  It discusses the ways on how to
read from a CDROM.  As reagrds to writing to one, I don't have any idea -- but I
think your CDROM drive must support it before you can perfrom a write.

YO!
-- 
Erwin D. Paguio
http://rh.iist.unu.edu/~ep/ydeeps.html
Pascal and ASM Enthusiast

ep@iist.unu.edu (Erwin Paguio) wrote:

>In article <sehari.827706428@eng3.iastate.edu>, sehari@iastate.edu (Babak $ehari) writes:
>|> ----
>|> 
>|> I am looking for a book or other informative material about reading
>|> and writing tracks of a CD-ROM.  Can I do it with BIOS only or do I
>|> need DOS?  Is it any different from reading and writing regular floppy
>|> or hard disks?!
>|> 
>|> I Like to do this in C or C++, if there is any good library that can
>|> read or write sectors/tracks of CD-ROM.  If that is not
>|> possible, I like to know about BIOS INT or DOS INT that does this.
>|> 
>|> Any good assembly books that talks about this subject?
>|> 
>|>                             With highest regards,
>|>                                  Babak   Sehari.
>|> 

>I suggest you look at the MSCDEX documentation.  It discusses the ways on how to
>read from a CDROM.  As reagrds to writing to one, I don't have any idea -- but I
>think your CDROM drive must support it before you can perfrom a write.

You can't write to a CD-ROM. Just to remind, the RO part stands for
"read-only". There is such a thing as a CD-ROM burner (for people with
$many) which will write whole CDs at a time on special writeable
blanks, but this is still write-once - you can't change it thereafter.
[at a push, these will do multiple "sessions" on one CD, sequentially,
but for technical reasons, you lose a number of megs per new "session"
apart from whatever it is you want to write]. If you want to use one
of these, I believe (being far too poor to own one myself!) that they
generally need their own, proprietary software, which will probably be
sold seperately to you for another $many.

>YO!
>-- 
>Erwin D. Paguio
>http://rh.iist.unu.edu/~ep/ydeeps.html
>Pascal and ASM Enthusiast

L8r.
-Matt

In article <4j6vqn$qra@soap.news.pipex.net>, gm78@dial.pipex.com (Matt Francis) writes:
|> ep@iist.unu.edu (Erwin Paguio) wrote:
|> 
|> >In article <sehari.827706428@eng3.iastate.edu>, sehari@iastate.edu (Babak $ehari) writes:
|> >|> ----
|> >|> 
|> >|> I am looking for a book or other informative material about reading
|> >|> and writing tracks of a CD-ROM.  Can I do it with BIOS only or do I
|> >|> need DOS?  Is it any different from reading and writing regular floppy
|> >|> or hard disks?!
|> >|> 
|> >|> I Like to do this in C or C++, if there is any good library that can
|> >|> read or write sectors/tracks of CD-ROM.  If that is not
|> >|> possible, I like to know about BIOS INT or DOS INT that does this.

I think MSCDEX hooked INT 25h and 26h so that you can perform disk read or
write (if the drive is capable) just like on an ordinary hard disk...

|> >|> Any good assembly books that talks about this subject?
|> >|> 
|> >|>                             With highest regards,
|> >|>                                  Babak   Sehari.
|> >|> 
|> 
|> >I suggest you look at the MSCDEX documentation.  It discusses the ways on how to
|> >read from a CDROM.  As reagrds to writing to one, I don't have any idea -- but I
|> >think your CDROM drive must support it before you can perfrom a write.
|> 
|> You can't write to a CD-ROM. Just to remind, the RO part stands for
|> "read-only". 

I think the original poster meant CD-R for writing and CDROM for reading.
There already a couple of drives allowing for personal mastering of CDs.

|> There is such a thing as a CD-ROM burner (for people with
|> $many) which will write whole CDs at a time on special writeable
|> blanks, but this is still write-once - you can't change it thereafter.

Yes, the technology only allows for writing unto the disc once...

|> [at a push, these will do multiple "sessions" on one CD, sequentially,
|> but for technical reasons, you lose a number of megs per new "session"
|> apart from whatever it is you want to write]. 

A new session would take about 9MB of space.  But I've read in an article
once that you could create new volumns instead which only take around 300KB
of overhead (which is much better than 9MB).

|> If you want to use one of these, I believe (being far too poor to own 
|> one myself!) 

Same here :-(

|> that they generally need their own, proprietary software, which will 
|> probably be sold seperately to you for another $many.

Most CD recorders use proprietary software.  But more often, the software
is bundled with the drive when you buy it.  I myself am on the lookout for
any information of how to go about doing a CD writer software.  Unfortunately,
I haven't found any material discussing that nor the drive to test it.  
Maybe next year....

YO!
-- 
Erwin D. Paguio
http://rh.iist.unu.edu/~ep/ydeeps.html
Pascal and ASM Enthusiast

---

I found a CD machine in my friend's school that writes CDs as well as
read it.  So, I want to copy a few of his "public domain" CDs.  In order
to this I would like to read the CD sector by sector and record it on
the hard drive.  Then, write each sector on the same place on the
recordable CD.  This way I can copy his CDs.

Of course, I need more info on this.  For example is there a hidden
track on CDs like track 81 on floopies?  Or how many tracks there is
on each CD? or how many bytes each sector holds? 


                      With highest regards,
                           Babak   Sehari

On Mon, 25 Mar 1996 20:32:57 GMT gm78@dial.pipex.com (Matt Francis)
spewed such:


>You can't write to a CD-ROM. Just to remind, the RO part stands for
>"read-only". There is such a thing as a CD-ROM burner (for people with
>$many) which will write whole CDs at a time on special writeable
>blanks, but this is still write-once - you can't change it thereafter.
>[at a push, these will do multiple "sessions" on one CD, sequentially,
>but for technical reasons, you lose a number of megs per new "session"
>apart from whatever it is you want to write]. If you want to use one
>of these, I believe (being far too poor to own one myself!) that they
>generally need their own, proprietary software, which will probably be
>sold seperately to you for another $many.

	Actually to clear things up just a bit more : CD writeable drives have
been plummeting in price for a while now, with a little searching you
can pick one up for about $1500.
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sehari@iastate.edu (Babak $ehari) wrote:

>---

>I found a CD machine in my friend's school that writes CDs as well as
>read it.  So, I want to copy a few of his "public domain" CDs.  In order
>to this I would like to read the CD sector by sector and record it on
>the hard drive.  Then, write each sector on the same place on the
>recordable CD.  This way I can copy his CDs.

Just about any CD creation software will let you read in a CD (usually
cinsidered a master) and make an image of it on the HD for later use
of duplication.

You cannot use conventional techniques (as you would with floppy
drives or hard drives) to just read a sector then write it out.
Information is stored in a standard ISO format.  Along with this (and
although it isn't apparent by doing a directory of the CD) all of the
information is actually stored in single sector on the CD (this is
used to seperate the different ISO type for PC's, MAC's, Video and
audio tracks.

Writing to a CD can be VERY dependant on the drive itself.  I would
hope that the cd-burner came with some software for doing these types
of operations.

If you are really want to write your own software, you will most likly
have to contact ISO to get the format information.  As this
information is copyrighted and is sold by the ISO (and it definatly
can be VERY pricy dependying on the information in it), it is very
doubtfull that you will find it anywhere on the net.

If you are adament about copying public domain CD's and plan on
duplication several over the course of time, I would look into getting
Corel's CD creation software.  Its a very complete package and will do
exactly what you want. (I really recommend getting this software over
writing it...it will probably be a LOT cheaper considering ISO prices
and it won't take you several months and 30-40 test CD's to get it
right).

(also check of the duplication restrictions and/or licensing formation
on shareware CD's and some information such as the installation
programs or other special items may be copyrighted by the
manufacturers and/or distributor of the CD).




Chet Simpson
-----------------------------------------------
http://www2.eos.net/chets/index.html

>>I found a CD machine in my friend's school that writes CDs as well as


I wish MY school had a CD-R...   *sigh*