VID1_INTERLACE
if (check_video1 & VID1_INTERLACE) {
bootpref[ARRAY_VID1] |= VID1_INTERLACE;
check_video1 |= VID1_INTERLACE;
if (check_video1 & VID1_INTERLACE) {
bootpref[ARRAY_VID1] &= ~VID1_INTERLACE;
check_video1 |= VID1_INTERLACE;
if (vid1 & VID1_INTERLACE) {
if (vid1 & VID1_INTERLACE) {