VB_DISPTYPE_CRT1
ivideo->currentvbflags &= ~VB_DISPTYPE_CRT1;
ivideo->currentvbflags |= VB_DISPTYPE_CRT1;
if( ((ivideo->currentvbflags & VB_DISPTYPE_CRT1) && mycrt1off) ||
((!(ivideo->currentvbflags & VB_DISPTYPE_CRT1)) && !mycrt1off) ) {
if(ivideo->currentvbflags & VB_DISPTYPE_CRT1) {
#define VB_DISPTYPE_DISP1 VB_DISPTYPE_CRT1