Digital Copy Bit Clarification

Gary Laatsch Gary_Laatsch at
Wed Aug 15 10:34:34 PDT 2001

* From the T10 Reflector (t10 at, posted by:
* Gary Laatsch <Gary_Laatsch at>
I am looking at the defintions of control bits in Table 7 in section
of MM3 R7 and have a question about the "digital copy"(bit 1).  All the data
cd's I see have a "0" in this bit (value of 14h in the TOC).  But apparently
some are starting to come with a "1" (value of 16h in the TOC).  This
indicates that digital copying is prohibited on every disk I have seen so
far.  Of course this doesn't make sense to me and I am wondering if this is
a don't care bit if it is a data cd.  I cannot find a good definition on
these bits and the meaning in the spec.  Is there another document I can
look at to get a better definition and understanding. Or am I looking at the
wrong table?

Gary Laatsch
Phoenix Technologies Ltd.
Email:Gary_Laatsch at

"Whatever is begun in anger ends in shame. " 
     - Benjamin Franklin (1706-1790) 

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