INT 17 - INSET - START GETTING SCALED IMAGE
        AX = CD0Bh
        DS:SI -> ASCIZ pathname of .PIX file
        BX = number of bitplanes
        CX = number of rows in output bitmap
        DX = number of columns in output bitmap
Return: AX = status
            0000h OK
            FFFFh error
Note:   image is returned in strips by repeated calls to AX=CD0Ch