MSX stick

stick.c

/*
z88dk / WebMSX
zcc +msx -lndos -create-app stick.c
bload"cas:",r
*/

#include <msx/gfx.h>
#include <stdio.h>

const int dx[] = { 0, 0, 1, 1, 1, 0, -1, -1, -1 };
const int dy[] = { 0, -1, -1, 0, 1, 1, 1, 0, -1 };

void main()
{
    int px = 0;
    int py = 0;

    printf("\xc");

    while (! get_trigger(0)) {
        int st = get_stick(0);
        px += dx[st];
        py += dy[st];
        printf("\xbST:%d X:%d Y:%d", st, px, py);
    }
}