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

            ROM_LOAD("zaxxon.3", 0x0000, 0x2000, 0x6e2b4a30);
            ROM_LOAD("zaxxon.2", 0x2000, 0x2000, 0x1c9ea398);
            ROM_LOAD("zaxxon.1", 0x4000, 0x1000, 0x1c123ef9);

            ROM_REGION(0x1800, REGION_GFX1 | REGIONFLAG_DISPOSE);
            ROM_LOAD("zaxxon.14", 0x0000, 0x0800, 0x07bf8c52);/* characters */

            ROM_LOAD("zaxxon.15", 0x0800, 0x0800, 0xc215edcb);
            /* 1000-17ff empty space to convert the characters as 3bpp instead of 2 */

            ROM_REGION(0x6000, REGION_GFX2 | REGIONFLAG_DISPOSE);
            ROM_LOAD("zaxxon.6", 0x0000, 0x2000, 0x6e07bb68);/* background tiles */

            ROM_LOAD("zaxxon.5", 0x2000, 0x2000, 0x0a5bce6a);
            ROM_LOAD("zaxxon.4", 0x4000, 0x2000, 0xa5bf1465);

            ROM_REGION(0x6000, REGION_GFX3 | REGIONFLAG_DISPOSE);
            ROM_LOAD("zaxxon.11", 0x0000, 0x2000, 0xeaf0dd4b);/* sprites */

            ROM_LOAD("zaxxon.12", 0x2000, 0x2000, 0x1c5369c7);
            ROM_LOAD("zaxxon.13", 0x4000, 0x2000, 0xab4e8a9a);

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

            ROM_LOAD("zaxxon.8", 0x0000, 0x2000, 0x28d65063);
            ROM_LOAD("zaxxon.7", 0x2000, 0x2000, 0x6284c200);
            ROM_LOAD("zaxxon.10", 0x4000, 0x2000, 0xa95e61fd);
            ROM_LOAD("zaxxon.9", 0x6000, 0x2000, 0x7e42691f);

            ROM_REGION(0x0200, REGION_PROMS);
            ROM_LOAD("zaxxon.u98", 0x0000, 0x0100, 0x6cc6695b);/* palette */

            ROM_LOAD("zaxxon.u72", 0x0100, 0x0100, 0xdeaa21f7);/* char lookup table */

            ROM_END();
        }