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

            ROM_LOAD("nprinces.001", 0x0000, 0x4000, 0xe0de073c); /* encrypted */

            ROM_LOAD("nprinces.002", 0x4000, 0x4000, 0x27219c7f); /* encrypted */

            ROM_LOAD("7151.96", 0x8000, 0x4000, 0xf2eeb0d8);

            ROM_REGION(0x10000, REGION_CPU2);/* 64k for sound cpu */

            ROM_LOAD("6559.120", 0x0000, 0x2000, 0x5a1570ee);

            ROM_REGION(0xc000, REGION_GFX1 | REGIONFLAG_DISPOSE);
            ROM_LOAD("6558.82", 0x0000, 0x2000, 0x2af9eaeb);
            ROM_LOAD("6557.65", 0x2000, 0x2000, 0x6eb131d0);
            ROM_LOAD("6556.81", 0x4000, 0x2000, 0x79fd26f7);
            ROM_LOAD("6555.64", 0x6000, 0x2000, 0x7f669aac);
            ROM_LOAD("6554.80", 0x8000, 0x2000, 0x5ac9d205);
            ROM_LOAD("6553.63", 0xa000, 0x2000, 0xeb82a8fe);

            ROM_REGION(0x10000, REGION_GFX2);/* 64k for sprites data */

            ROM_LOAD("6546.117", 0x0000, 0x4000, 0xa4785692);
            ROM_LOAD("6548.04", 0x4000, 0x4000, 0xbdf278c1);
            ROM_LOAD("6547.110", 0x8000, 0x4000, 0x34451b08);
            ROM_LOAD("6549.05", 0xc000, 0x4000, 0xd2057668);
            ROM_END();
        }