/* example 28-3 */
        #include <stdio.h>
	#include <dos.h>
	main()
	{
	unsigned int convmem;
	union REGS regin,regout;
	int86(0x12,&regin,&regout);
	convmem=regout.x.ax;
	printf("This PC has %dKB of Conventional memory\n" ,convmem);
	}