VIDCON0_ENVID_F
decon_set_bits(ctx, DECON_VIDCON0, VIDCON0_ENVID | VIDCON0_ENVID_F, ~0);
val = VIDCON0_ENVID | VIDCON0_ENVID_F;
val |= VIDCON0_ENVID | VIDCON0_ENVID_F;
vidcon0 |= VIDCON0_ENVID | VIDCON0_ENVID_F;
vidcon0 &= ~VIDCON0_ENVID_F;