/*SINE4C.C - SINE PROGRAM WITH 4 POINTS USING INTERRUPTS                */
#include "aiccomc.c"                      /*AIC comm routines           */     
int AICSEC[4] = {0x162C,0x1,0x4892,0x67}; /*config data for AIC         */
int loop = 0;                             /*declare global variables    */
int sin_table[4] = {0,1000,0,-1000};      /*values for 4-point sinewave */

void c_int05()                            /*XINT0 interrupt routine     */
{
  PBASE[0x48] = sin_table[loop] << 2;     /*output value from sine table*/
  if (loop < 3) ++loop;                   /*increment loop counter < 3  */
  else loop = 0;                          /*reset loop counter          */
}                                                                       

main()
{
  AICSET_I();                             /*function to configure AIC   */ 
  for (;;);                               /*wait for interrupt          */
}