public void handler() {
            ROM_REGION(2 * 0x10000, REGION_CPU1);/* 64k for code + 64k for decrypted opcodes */

            ROM_LOAD("u27", 0x0000, 0x2000, 0x254f350f);
            ROM_LOAD("u28", 0x2000, 0x2000, 0x3a1eaa99);
            ROM_LOAD("u29", 0x4000, 0x2000, 0x0ee67e78);

            ROM_REGION(0x1800, REGION_GFX1 | REGIONFLAG_DISPOSE);
            ROM_LOAD("1921.u68", 0x0000, 0x0800, 0x77f8ff5a); /* characters */

            ROM_LOAD("1922.u69", 0x0800, 0x0800, 0xcf63621e);
            /* 1000-17ff empty space to convert the characters as 3bpp instead of 2 */

            ROM_REGION(0x6000, REGION_GFX2 | REGIONFLAG_DISPOSE);
            ROM_LOAD("1934.113", 0x0000, 0x2000, 0x39bb679c); /* background tiles */

            ROM_LOAD("1933.112", 0x2000, 0x2000, 0x1022185e);
            ROM_LOAD("1932.111", 0x4000, 0x2000, 0xc7a715eb);

            ROM_REGION(0x6000, REGION_GFX3 | REGIONFLAG_DISPOSE);
            ROM_LOAD("1925.u77", 0x0000, 0x2000, 0xa7965437); /* sprites */

            ROM_LOAD("1926.u78", 0x2000, 0x2000, 0x9a3af434);
            ROM_LOAD("1927.u79", 0x4000, 0x2000, 0x0323de2b);

            ROM_REGION(0x8000, REGION_GFX4 | REGIONFLAG_DISPOSE);/* background tilemaps converted in vh_start */

            ROM_LOAD("1929.u91", 0x0000, 0x2000, 0x55c7c757);
            ROM_LOAD("1928.u90", 0x2000, 0x2000, 0xe58b155b);
            ROM_LOAD("1931.u93", 0x4000, 0x2000, 0x55fe0f82);
            ROM_LOAD("1930.u92", 0x6000, 0x2000, 0xf355f105);

            ROM_REGION(0x0200, REGION_PROMS);
            ROM_LOAD("clr.u98", 0x0000, 0x0100, 0x0fd671af);/* palette */

            ROM_LOAD("clr.u72", 0x0100, 0x0100, 0x03233bc5);/* char lookup table */

            ROM_REGION(0x1000, REGION_SOUND1);/* sound? */

            ROM_LOAD("1923.u50", 0x0000, 0x0800, 0x59994a51);
            ROM_LOAD("1924.u51", 0x0800, 0x0800, 0xa75e0011);
            ROM_END();
        }