//---------------------------------------------------------------
// EXAMPLE EX7.C :  Demonstrate the FOR statement - II.
//
// C.P. Diduch, Dec 1999.
//---------------------------------------------------------------
#define	KEY_PA 	0x138	  // 82C55A port addresses for PA,
#define KEY_PB 	0x13A	  // PB,
#define KEY_PC 	0x13C	  // PC and the
#define KEY_CON	0x13E	  // Control Register.

#include <conio.h> 	  // conio.h contains prototypes for 
			  // inportb() and outportb(). 
//---------------------------------------------------------------
void main()
{
char i, j;

outportb(KEY_CON, 0x82);  // Initialize 82C55A PPI with ports 
			  // KEY_PC and KEY_PA as OP ports and 
			  // port PB as an IP port.

for (i = 1, j = 10; j > 0; i++, --j) {
   outportb(KEY_PC, j/i);
   outportb(KEY_PA, j%i);
   }
}