zx_cross_loadwid
int zx_cross_loadwid(struct zx_softc *, u_int, u_int, u_int);
zx_cross_loadwid(sc, ZX_WID_DBL_8, 0, 0x2c0);
zx_cross_loadwid(sc, ZX_WID_DBL_8, 1, 0x30);
zx_cross_loadwid(sc, ZX_WID_DBL_8, 2, 0x20);
zx_cross_loadwid(sc, ZX_WID_DBL_24, 1, 0x30);