IIDC_ISO_EN
err = fwcam_write_quadlet(sc, IIDC_ISO_EN, IIDC_ISO_EN_ON);
err = fwcam_write_quadlet(sc, IIDC_ISO_EN,
fwcam_write_quadlet(sc, IIDC_ISO_EN, 0);
fwcam_write_quadlet(sc, IIDC_ISO_EN, 0);
fwcam_write_quadlet(sc, IIDC_ISO_EN, 0);