DICMDBUF0
WR4(sc, DICMDBUF0, DI_CMD_REQUEST_ERROR);
WR4(sc, DICMDBUF0, DI_CMD_STOP_MOTOR | cmdflags);
WR4(sc, DICMDBUF0, DI_CMD_INQUIRY);
WR4(sc, DICMDBUF0, DI_CMD_REQUEST_ERROR);
WR4(sc, DICMDBUF0, DI_CMD_READ_DVD);
WR4(sc, DICMDBUF0, DI_CMD_READ_DVD_STRUCT(cmd->bytes[6]));
WR4(sc, DICMDBUF0, DI_CMD_REPORT_KEY(cmd->bytes[9] >> 2));
WR4(sc, DICMDBUF0, DI_CMD_READ_DVD_STRUCT(DVD_STRUCT_PHYSICAL));