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   _bios_memsize

   Usage
   #include <bios.h>
   int _bios_memsize(void);

   Description
   The  function _bios_memsize executes a BIOS interrupt 0x12,  which  is
   the memory size determination routine.

   Example
   #include <stdio.h>
   #include <bios.h>

   main()
   {
      printf("The memory size of this system is %dK\n",_bios_memsize());
   }

   Return Value
   Returns  the  maximum number of contigous 1K memory blocks  which  are
   present, as an integer.