INT 62 u - FGDRIVER v3.03 - "FG_EGACHECK" - GET INFO ABOUT ACTIVE EGA DISPLAY
        AX = 0023h
Return: AX = number of 64K banks of video memory, or 0000h if no EGA or EGA
                  without an Enhanced Color Display
Note:   For FGDRIVER v1.10, this function was "FG_MOVE" (see AX=0068h);
          "FG_EGACHECK" was AX=0005h
SeeAlso: AX=00A2h

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