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lizzzzi7908
lizzzzi7908
18.12.2019 • 
Computers and Technology

In a dma employed system, an i/o device has a data transfer rate of 100kbps and wants to transfer a block of 256 bytes where the data are transferred two bytes at a time. in the same system, bus control transfer takes 100 ns each way, i.e., from i/o device to processor or vice versa. the bus cycles takes 200 ns.

a. how long would the device tie up the bus when transferring the block in a burst mode, i.e., the dma interface gains bus mastership prior to the start of a block transfer and maintains control of the bus until the whole block is transferred?

b. repeat the calculation for cycle-stealing mode.

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