#include <bios.h>

int PC_GetKey (void){
  int key;
  if (bioskey(1)==0) return 0;  //no key pressed
  key=bioskey(0);               //get key code
 
  if (key&0xFF) key=key&0x00FF; //if (key&0xFF) it's ASCII code or it's function code 
 
  return(key);
}