ACM_CURSOR_POSITION
pos->x = acm[ACM_CURSOR_POSITION + 0] +
(acm[ACM_CURSOR_POSITION + 1] << 8);
pos->y = acm[ACM_CURSOR_POSITION + 2] +
(acm[ACM_CURSOR_POSITION + 3] << 8);
*(acm + (ACM_CURSOR_POSITION+1)) = x >> 8;
*(acm + (ACM_CURSOR_POSITION+0)) = x & 0xff;
*(acm + (ACM_CURSOR_POSITION+3)) = y >> 8;
*(acm + (ACM_CURSOR_POSITION+2)) = y & 0xff;