| 0x15 || dec || $cX || $cY || <code>$cX = aes_dec(active_key_idx, $cY);</code> || <code>(ACL(active_key_idx) & 1) && (ACL(Y) & 2)</code> | | 0x15 || dec || $cX || $cY || <code>$cX = aes_dec(active_key_idx, $cY);</code> || <code>(ACL(active_key_idx) & 1) && (ACL(Y) & 2)</code> |