DoubleScanMode
if(modeflag & DoubleScanMode) temp |= 0x80;
if((!(modeflag & DoubleScanMode)) || (!(modeflag & HalfDCLK))) {
if(modeflag & DoubleScanMode) tempax |= 0x80;
if(modeflag & DoubleScanMode) yres <<= 1;
if(modeflag & DoubleScanMode) temp |= 0x80;
if(modeflag & DoubleScanMode) tempax |= 0x80;
if(modeflag & DoubleScanMode) tempah |= 0x80;
if(SiS_Pr->SiS_EModeIDTable[j].Ext_ModeFlag & DoubleScanMode) {