These data variables are defined when an EGA or VGA is installed.

Address   Size Contents   (most are in BIOS Data Area)
0000:0074   4  prVidInit  INT 1dH address of VidInitRec
0000:010c   4  prFont     INT 43H addr of Font Definition Data for gfx

0040:0085   2  wPoints    height of character matrix (scan lines)
0040:0087   1  bInfo      bit fields in EgaMiscInfoRec layout
0040:0088   1  bInfo2     bit fields in EgaMiscInfo2Rec layout
0040:0089   1  rFlags     bit fields in VgaFlagsRec layout (VGA only)
0040:008A   1  bDccIdx    current display combo in VgaDccRec (VGA only)
0040:00a8   4  pfrSavePtr far address of an EgaSavePtrRec     
  pfrVidParms         EgaVidParmsRec
  pfrDynParms         EgaDynamicSaveRec   or 0000:0000
  pfrTxtAuxFnt        EgaTxtFontRec       or 0000:0000
  pfrGfxAuxFnt        EgaGfxFontRec       or 0000:0000
  pfrSavePtr2         VgaSavePtr2Rec     
      font info        
      pfFontDefData       Font Definition Data
      font info        
      pfFontDefData       Font Definition Data
      VgaSavePtr2Rec   (VGA only)
  pfrDccRec           VgaDccRec
  pfrTxtAuxFnt        EgaTxtFontRec        or 0000:0000
  pfrPalProf          VgaPaletteProfileRec or 0000:0000

See Also: EGA
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EGA/VGA Data Areas