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Q. Explain functions of direct memory access?
Though CPU intervention in DMA is minimised however it should use path between interfaces that is system bus. So DMA involves an extra interface on system bus. A scheme known as cycle stealing permits DMA interface to transfer one data word at a time, after that it should return control of bus to processor. Processor merely delays its operation for one memory cycle to permit directly memory I/O transfer to 'steal' one memory cycle. When an I/O is requested processor issues a command to DMA interface by transmitting to DMA interface the subsequent information (Figure below):
Figure: DMA block diagram
The extra key inserted at the end of the array is called a Sentinel is the extra key inserted at the end of the array
how to breadboARD THE 4 BIT COMPARATOR
HCP
Define the meaning of business-to-business. B2B (business-to-business): The consensus is universal: it is the priority; it is where the money is. It’s rather true; theref
What is PBO and PAI events? PBO- Process before Output-It verifies the flow logic before displaying the screen. PAI- Process after Input-It verifies the flowlogic after
Explain FDM and show how CCITT standards help in building the base band? Frequency Division Multiplexing: This is the process of combining some information channels through s
Q. Explain Indirect Cycle in control unit? Once an instruction is fetched the subsequent step is to fetch the operands. The instruction may have indirect and direct addressing
What do you understand by Hit ratio? When a processor refers a data item from a cache, if the referenced item is in the cache, then such a reference is called hit. If the refer
Q. Explain Error Detection and Correction Codes? Before we wind up data representation in reference of today's computers one should determine about code that helps in correctio
A number of 256 x 8 bit memory chips are available. To design a memory organization of 2 K x 8 memory. Identify the requirements of 256 x 8 memory chips and explain the details.
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