void MGADisplayPowerManagementSetMerged(ScrnInfoPtr pScrn,
int PowerManagementMode,
int flags);
void MGAMergePointerMoved(int scrnIndex, int x, int y);
void MGAAdjustMergeFrames(int scrnIndex, int x, int y, int flags);
Bool MGAPreInitMergedFB(ScrnInfoPtr pScrn1, int flags);
Bool MGACloseScreenMerged(int scrnIndex, ScreenPtr pScreen);
Bool MGASaveScreenMerged(ScreenPtr pScreen, int mode);
typedef struct _MergedDisplayModeRec {
DisplayModePtr Monitor1;
DisplayModePtr Monitor2;
MgaScrn2Rel Monitor2Pos;
} MergedDisplayModeRec, *MergedDisplayModePtr;
#define MDMPTR(x) ((MergedDisplayModePtr)(x->currentMode->Private))