On , Alec Kadulin (2:5061/17.6@fidonet) wrote: 
 VN> Is Possible whether in C reading more 64K from file (is necessary 12-13
 VN> Mb)? How this is to do? Thank you.
 > I think I sure %subj% is impossible if you're writing for DOS. 'Cos C uses
 > DOS service (int 21h) whitch CANNOT read more than 64k at a time. UC this
 > is because of restrictions ``unsigned int'' type.
Alec...
  While the basic answer here is correct, it doesn't mean you can't hide the 
details from a calling program. For example, in SNIPPETS there is a file 
called HUGEREAD.C which implements reading and writing of huge data to/from 
either standard C or Posix streams. Implementing similar code in C++ would be 
trivial.
  A more significant question is the desire to read or write "12-13 Mb". To 
do this would require that the program operate in one of the x86's 32-bit 
modes, which would require double buffering to accomodate the underlying 
restrictions of real-mode DOS. The most basic question, of course, is do you 
physically have that much memory free?!? 
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