public void handler() {
            ROM_REGION(0x10000, REGION_CPU1);/* 64k for code */
            ROM_LOAD("swarm1.bin", 0x0000, 0x0800, 0x21eba3d0);
            ROM_LOAD("swarm2.bin", 0x0800, 0x0800, 0xf3a436cd);
            ROM_LOAD("swarm3.bin", 0x1000, 0x0800, 0x2915e38b);
            ROM_LOAD("swarm4.bin", 0x1800, 0x0800, 0x8bbbf486);
            ROM_LOAD("swarm5.bin", 0x2000, 0x0800, 0xf1b1987e);

            ROM_REGION(0x1000, REGION_GFX1 | REGIONFLAG_DISPOSE);
            ROM_LOAD("swarma.bin", 0x0000, 0x0800, 0xef8657bb);
            ROM_LOAD("swarmb.bin", 0x0800, 0x0800, 0x60c4bd31);

            ROM_REGION(0x0020, REGION_PROMS);
            ROM_LOAD("galaxian.clr", 0x0000, 0x0020, 0xc3ac9467);
            ROM_END();
        }