Function            isExtended - is Extended memory installed

  Syntax              boolean isExtended(void);

  Prototype in        ibm.h

  Remarks             checks if Extended memory is installed.

  Return value        returns TRUE if Extended memory is installed, FALSE
                      otherwise.

  See also            Extendedtotal()

  Example             #include <ibm.h>

                      main()
                      {
                           printf("Extended memory is ");
                           if (! isExtended())
                                printf("not ");
                           printf("installed\n");
                      }