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_okbigbuf (T and S Memory Models Only).

   This variable defines which memory allocation scheme will be used. There
   are two methods.

   Method 1    Allocate all available memory up to 64 kb to the heap upon
   program startup. This is the default method.

   Method 2    Allocate memory to the heap only as needed. This method is
   to be used if a spawn function will be needed. To use, declare _okbigbuf

   as shown below. For more information see the chapter The Zortech C++
   Compiler in the Compiler Guide.

   Usage

   int _okbigbuf = 0;
   /* Allocate memory as needed */

   _okbigbuf != 0 also means that large disk buffers are used for stream I/O
   that are outside the data segment. This is all controlled by c.asm.