The following functions are low-level functions which deal with the
timer and with the video display. In general, the video functions
should not be used by an application program because they do not know
anything about the windowing system.

 BIOSGetTime
 BIOSSetTime
 DosGetTime
 IsEGA
 IsVGA
 MonitorSetRoutine
 ToggleEGA
 VidBlankRect
 VidClearLine
 VidClearScreen
 VidFillFrame
 VidFrame
 VidGetMode
 VidGetPos
 VidHideCursor
 VidPutc
 VidPutcn
 VidPuts
 VidPutsn
 VidScroll
 VidSetCursor
 VidSetPos