i have this code :
#include "fxlib.h"
#include "dispbios.h"
#include "stdio.h"

int AddIn_main(int isAppli, unsigned short OptionNum)
{
int pos[2] = {8,8};
int dir[2] = {1,0};
int key;

while(1){


if (IsKeyDown(35)) {break; return 1;}

//GetKey(&key);

if (IsKeyDown(30021)) {
dir[0] = 1;
dir[1] = 0;
}
if (IsKeyDown(30020)) {
dir[0] = -1;
dir[1] = 0;
}
if (IsKeyDown(30018)) {
dir[0] = 0;
dir[1] = -1;
}
if (IsKeyDown(30023)) {
dir[0] = 0;
dir[1] = 1;
}
Bdisp_AllClr_DDVRAM();
PrintMini(4*pos[0]-2,4*pos[1]-3," ",0);

if (pos[0]+dir[0]>=1 && pos[1]+dir[1]>=1 && pos[0]+dir[0]<=15 && pos[1]+dir[1]<=15) {
pos[0] += dir[0];
pos[1] += dir[1];
}
PrintMini(4*pos[0]-2,4*pos[1]-3,"0",0);
Bdisp_PutDisp_DD();


}
return 1;
}

just basic moving into 4 directions but when i quit the program i get an error 28