public void handler() {
            ROM_REGION(0x10000, REGION_CPU1);/* 64k for code */
            ROM_LOAD("bh1", 0x0000, 0x0800, 0x64998819);
            ROM_LOAD("bh2", 0x0800, 0x0800, 0x26f26ce4);
            ROM_LOAD("bh3", 0x1000, 0x0800, 0x3418bc45);
            ROM_LOAD("bh4", 0x1800, 0x0800, 0x735ff481);
            ROM_LOAD("bh5", 0x2000, 0x0800, 0x3f657be9);
            ROM_LOAD("bh6", 0x2800, 0x0800, 0xa057ab35);

            ROM_REGION(0x1000, REGION_GFX1 | REGIONFLAG_DISPOSE);
            ROM_LOAD("bh7", 0x0000, 0x0800, 0x975ba821);
            ROM_LOAD("bh8", 0x0800, 0x0800, 0x03d11020);

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