#include <stdio.h>
	#include <dos.h>
 	main()
 	{ 
 	unsigned char b1,b2;
 	int extmem;
	int w;		/* upper byte of word size extended memory */
 	outp(0x70,0x30);	/* get the low byte */
 	b1=inp(0x71);
 	outp(0x70,0x31);	/* get the high byte */
 	b2 = inp(0x71);
 	w = b2<<8; /* shift left 8 digits (in binary) to make it upper byte */
 	extmem=w+b1;	/* add it to lower byte and display the size */
 	printf("The extended memory installed is: %d KB \n",extmem);
	}