INT 62 u - FGDRIVER v3.03 - "FG_PUTBLOCK" - RESTORE RECTANGLE OF DISPLAY
        AX = 007Dh
        ES:BX -> buffer containing previously-saved image
        CX = left edge
        DX = right edge
        SI = top edge
        DI = bottom edge
Notes:  For FGDRIVER v1.10, this function was "FG_MOUSEPOS" (see AX=0064h);
           "FG_PUTBLOCK" did not exist yet
        In text modes, coordinates are character positions; in graphics modes,
          they are defined in screen space, and the left and right edges are
          adjusted to a byte boundary if necessary
SeeAlso: AX=0031h,AX=007Eh

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