COMPUTER SCIENCE AND ENGINEERING
COMPUTER ARCHITECTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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I/O read
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Memory read
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memory write
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I/O write
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Detailed explanation-1: -I/O Read: The command over this control line causes the data from the addressed I/O port to be placed over the data bus. Transfer ACK: This control line indicates the data has been received from the data bus or is placed over the data bus.
Detailed explanation-2: -The control bus contains a control line for write instructions and a control line for read instructions. When the CPU writes data to the main memory, it transmits a signal to the write command line. The CPU also sends a signal to the read command line when it needs to read.
Detailed explanation-3: -Memory Read-causes data from the addressed location to be placed on the data bus.
Detailed explanation-4: -Transfer ACK: Indicates that data have been accepted from or placed on the bus.