public void handler() {
            PORT_START();       /* IN0 */

            PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_COIN1);
            PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_COIN2);
            PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_COIN3);
            PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNKNOWN);
            PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_START1);
            PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_START2);
            PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNKNOWN);
            PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNKNOWN);

            PORT_START();       /* DSWA */

            PORT_DIPNAME(0x07, 0x07, DEF_STR("Coin_A"));
            PORT_DIPSETTING(0x01, DEF_STR("4C_1C"));
            PORT_DIPSETTING(0x02, DEF_STR("3C_1C"));
            PORT_DIPSETTING(0x03, DEF_STR("2C_1C"));
            PORT_DIPSETTING(0x00, "2 Coins/1 Credit (1 to continue)");
            PORT_DIPSETTING(0x07, DEF_STR("1C_1C"));
            PORT_DIPSETTING(0x06, DEF_STR("1C_2C"));
            PORT_DIPSETTING(0x05, DEF_STR("1C_3C"));
            PORT_DIPSETTING(0x04, DEF_STR("1C_4C"));
            PORT_DIPNAME(0x38, 0x38, DEF_STR("Coin_B"));
            PORT_DIPSETTING(0x08, DEF_STR("4C_1C"));
            PORT_DIPSETTING(0x10, DEF_STR("3C_1C"));
            PORT_DIPSETTING(0x18, DEF_STR("2C_1C"));
            PORT_DIPSETTING(0x00, "2 Coins/1 Credit (1 to continue)");
            PORT_DIPSETTING(0x38, DEF_STR("1C_1C"));
            PORT_DIPSETTING(0x30, DEF_STR("1C_2C"));
            PORT_DIPSETTING(0x28, DEF_STR("1C_3C"));
            PORT_DIPSETTING(0x20, DEF_STR("1C_4C"));
            PORT_DIPNAME(0x40, 0x40, DEF_STR("Unknown"));
            PORT_DIPSETTING(0x40, DEF_STR("Off"));
            PORT_DIPSETTING(0x00, DEF_STR("On"));
            PORT_DIPNAME(0x80, 0x80, DEF_STR("Unknown"));
            PORT_DIPSETTING(0x80, DEF_STR("Off"));
            PORT_DIPSETTING(0x00, DEF_STR("On"));

            PORT_START();       /* DSWB */

            PORT_DIPNAME(0x07, 0x07, DEF_STR("Difficulty"));
            PORT_DIPSETTING(0x07, "Super Easy");
            PORT_DIPSETTING(0x06, "Very Easy");
            PORT_DIPSETTING(0x05, "Easy");
            PORT_DIPSETTING(0x04, "Normal");
            PORT_DIPSETTING(0x03, "Difficult");
            PORT_DIPSETTING(0x02, "Very Difficult");
            PORT_DIPSETTING(0x01, "Super Difficult");
            PORT_DIPSETTING(0x00, "Ultra Super Difficult");
            PORT_DIPNAME(0x08, 0x08, DEF_STR("Unknown"));
            PORT_DIPSETTING(0x08, DEF_STR("Off"));
            PORT_DIPSETTING(0x00, DEF_STR("On"));
            PORT_DIPNAME(0x10, 0x10, DEF_STR("Unknown"));
            PORT_DIPSETTING(0x10, DEF_STR("Off"));
            PORT_DIPSETTING(0x00, DEF_STR("On"));
            PORT_DIPNAME(0x20, 0x20, DEF_STR("Unknown"));
            PORT_DIPSETTING(0x20, DEF_STR("Off"));
            PORT_DIPSETTING(0x00, DEF_STR("On"));
            PORT_DIPNAME(0x40, 0x40, DEF_STR("Unknown"));
            PORT_DIPSETTING(0x40, DEF_STR("Off"));
            PORT_DIPSETTING(0x00, DEF_STR("On"));
            PORT_DIPNAME(0x80, 0x80, DEF_STR("Unknown"));
            PORT_DIPSETTING(0x80, DEF_STR("Off"));
            PORT_DIPSETTING(0x00, DEF_STR("On"));

            PORT_START();       /* DSWC */

            PORT_DIPNAME(0x01, 0x01, DEF_STR("Unknown"));
            PORT_DIPSETTING(0x01, DEF_STR("Off"));
            PORT_DIPSETTING(0x00, DEF_STR("On"));
            PORT_DIPNAME(0x02, 0x02, DEF_STR("Unknown"));
            PORT_DIPSETTING(0x02, DEF_STR("Off"));
            PORT_DIPSETTING(0x00, DEF_STR("On"));
            PORT_DIPNAME(0x04, 0x04, DEF_STR("Free_Play"));
            PORT_DIPSETTING(0x04, DEF_STR("Off"));
            PORT_DIPSETTING(0x00, DEF_STR("On"));
            PORT_DIPNAME(0x08, 0x08, "Freeze");
            PORT_DIPSETTING(0x08, DEF_STR("Off"));
            PORT_DIPSETTING(0x00, DEF_STR("On"));
            PORT_DIPNAME(0x10, 0x10, DEF_STR("Flip_Screen"));
            PORT_DIPSETTING(0x10, DEF_STR("Off"));
            PORT_DIPSETTING(0x00, DEF_STR("On"));
            PORT_DIPNAME(0x20, 0x20, DEF_STR("Demo_Sounds"));
            PORT_DIPSETTING(0x20, DEF_STR("Off"));
            PORT_DIPSETTING(0x00, DEF_STR("On"));
            PORT_DIPNAME(0x40, 0x00, "Allow Continue");
            PORT_DIPSETTING(0x40, DEF_STR("No"));
            PORT_DIPSETTING(0x00, DEF_STR("Yes"));
            PORT_SERVICE(0x80, IP_ACTIVE_LOW);

            PORT_START();       /* Player 1 */

            PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_8WAY | IPF_PLAYER1);
            PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT | IPF_8WAY | IPF_PLAYER1);
            PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN | IPF_8WAY | IPF_PLAYER1);
            PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP | IPF_8WAY | IPF_PLAYER1);
            PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER1);
            PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_BUTTON2 | IPF_PLAYER1);
            PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_BUTTON3 | IPF_PLAYER1);
            PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNKNOWN);

            PORT_START();       /* Player 2 */

            PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_8WAY | IPF_PLAYER2);
            PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT | IPF_8WAY | IPF_PLAYER2);
            PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN | IPF_8WAY | IPF_PLAYER2);
            PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_UP | IPF_8WAY | IPF_PLAYER2);
            PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_BUTTON1 | IPF_PLAYER2);
            PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_BUTTON2 | IPF_PLAYER2);
            PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_BUTTON3 | IPF_PLAYER2);
            PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNKNOWN);
            INPUT_PORTS_END();
        }