[ Brian McCloud muttered to Brian Roche ]
 BR> As long as software is using  Dos/Int  21h  routines,  it  won't  handle
 BR> renumbered  or  crazy  sector numbers put in with Bios/Int 13h routines,
 BR> which was what the majority of Copy-protection schemes used.
 BM> I don't think my DiskCopy is using int 21h calls... I thinks it's
 BM> using the int 13h calls... from the diskette with bad sectors I tried
 BM> to copy, it tried but failed to read many of the sectors which had been
 BM> marked as bad.
iirc, the MS-dos   diskcopy and format generate calls through the IOCTL
functions in int 21h rather than directly going int 13h.
-df : Juukinzoku Game Development
      http://acm.vt.edu/~dpark/juukinzoku
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