The DUE doesn't express all of the necessary pins from the Atmel processor. The SAM3x does not multiplex A0-A7 and D0-D7. The Processor has D0-D15 (PC2-PC17) A0-A22 (PC21-PC30,PD0-PD9)
But the DUE only expresses
PC 2-9,12-17,21-26,28,30 Missing Data D8,9 Address A6,A8
PD 0-3,6-9 Missing Address A14,15
So, it is not possible unless a NEW Mega DUE is created and all of the necessary pins are expressed.
Chuck.