0080-008F ---- DMA page registers   (74612)


0080   r/w extra page register (temporary storage)
0081   r/w DMA channel 2 address byte 2
0082   r/w DMA channel 3 address byte 2
0083   r/w DMA channel 1 address byte 2
0084   r/w extra page register
0085   r/w extra page register
0086   r/w extra page register
0087   r/w DMA channel 0 address byte 2
0088   r/w extra page register
0089   r/w DMA channel 6 address byte 2
0089   r/w DMA channel 7 address byte 2
0089   r/w DMA channel 5 address byte 2
008C   r/w extra page register
008D   r/w extra page register
008E   r/w extra page register
008F   r/w DMA refresh page register