#include <dos.h>
	void interrupt mybeep(unsigned bp, unsigned di, unsigned si,
					  unsigned ds, unsigned es, unsigned dx,
					  unsigned cx, unsigned bx, unsigned ax)

	{      unsigned i, j;

		char originalbits, bits;
		unsigned char bcount = ax >> 8;      /* Get port setting */
		outportb(0x43,182);
		outportb(0x42,0xd0);
		outportb(0x42,0x11);
		bits = originalbits = inportb(0x61);
		   outportb(0x61, bits | 3);            /* Turn on speaker */
		for (i = 0; i <= bcount*8; i++)         /*delay a few seconds*/
		{
		   for (j = 0; j < 65535; j++) ;
		}
		outportb(0x61, bits & 0xfc);            /* Turn off speaker */
		/*outportb(0x61, originalbits);           /* Restore port setting */

	}
void install(void interrupt (*faddr)(), int inum)
	{
	    setvect(inum, faddr);
	}
void testbeep(unsigned char bcount, int inum)
	{
	    _AH = bcount;
	    geninterrupt(inum);
	}

main()
	{  char ch;
	    install(mybeep,250);
	    testbeep(255,250);
	    /*  ch = getch();*/
	}