INT 62 u - FGDRIVER v3.03 - "FG_MAKEPCX" - CREATE PCX FILE FROM SCREEN WINDOW
        AX = 0057h
        BX = left edge in screen space units
        CX = right edge in screen space units
        DX = top edge in screen space units
        SI = bottom edge in screen space units
        ES:DI -> ASCIZ filename of PCX file to create
Return: AX = status
            0000h successful
            0001h file not created
Notes:  For FGDRIVER v1.10, this function was unused; "FG_MAKEPCX" was AX=0061h
        The PCX file is created from the specified region of the active video
          page; the left and right edges are adjusted to a byte boundary if
          necessary
        If the specified file already exists, it is overwritten
        This call is ignored in text and Hercules low-resolution graphics modes
SeeAlso: AX=004Ah,AX=0058h,AX=0059h,AX=009Ah,AX=009Bh,AX=009Ch

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