#include "libepc.h"
void MyTimerISR(void); 
void MyKeyboardISR(void);

DWORD32 clockTickCount = 0;
int row=1, col=1;
main() {

   SetISR(IRQ2INT(IRQ_TICK), MyTimerISR) ; // install our timer ISR in the old location
   outportb(0x21, inportb(0x21) & ~0x01) ; /* Unmask IRQ0 (Timer IRQ) */

   SetISR(241, MyKeyboardISR) ;
   outportb(0x21, inportb(0x21) & ~0x02) ; /* Unmask IRQ1 (Keyboard IRQ) */

   enable();
   ClearScreen(0x07); 
   SetCursorPosition(row,col);

  while ( TRUE ) ; 

}
   
void MyTimerISR() {
 
   enable(); // enable higher priority interrupts
   
   clockTickCount++;
   if ( clockTickCount > 1500 ) Sound(1000); // get to work! 

   outportb(0x20,0x20); // send end of interrupt (EOI) to the 
                        // Programmable Interrupt Controller (PIC)

   __asm__("
         LEAVE;
         IRET;
        ");
} 

void MyKeyboardISR() {
   BYTE8 scanCode;
   char ch;

   enable(); // enable higher priority interrupts
 
   scanCode = inportb(0x60); // read the keyboard port (thereby acknowledging the
                   // interrupt
   if ( !(scanCode & 0x80)) { // key press, not key release
     ch = (char ) ScanCode2Ascii(scanCode);
     if ( col > 78) {
        row++;
        col = 1;
     }
     PutCharAt(ch,row,col++);
     SetCursorPosition(row,col);

     PUSHF;
     CLI;
     clockTickCount = 0;
     Sound(-1);
     POPF;
   }

   outportb(0x20,0x20); // send end of interrupt (EOI) to the 

   __asm__("
         LEAVE;
         IRET;
        ");
}