Question

What are the read and write control line in a DMA controller bidirectional? Under what condition and for what purpose are they used as inputs and outputs?

Answer 1

Explanation:

The read and write control lines running through the data buses have control signals. The microprocessor can read data from memory or write data to the memory so the data buses are bidirectional. One direction is needed to write the data while another direction is required for the read command to fetch the data.