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At the 3rd machine cycle (MC3: I) of the IN instruction Specify: (i) the contents of the demultiplexed low-order bus (A7-A,), (ii) the contents of the high-order bus (Ag-A15),

At the 3rd machine cycle (MC3: I) of the IN instruction Specify: (i) the contents of the demultiplexed low-order bus (A7-A,), (ii) the contents of the high-order bus (Ag-A15),

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Bus Demultiplexing The figure below shows a schematic ALE Enable that uses: G uProcessor a latch and the ALE signal to demultiplex the bus (AD7-ADo). While executing the instruction IN 8AH, the port address is duplicated on low-order (A7-A,) and high-order (Ag-A15) address buses. At the 3rd machine cycle (MC3: I) of the IN instruction Specify: (i) the contents of the demultiplexed low-order bus (A7-A,), (ii) the contents of the high-order bus (Ag-A15), (iii) and the contents of the multiplexed bus (AD7-AD,). Assume that data read from the Multiplexed bus AD7 A7 Output of the lat Latch AD, Ao Demultiplexed t D7-Do MC3: I 1/O Read T2 T3 A7 OUTPUT OF Port Address LATCH ??H ??H ??H A, A15 Port Address ??H ??H ??H Ag ALE AD, ??H ??H ??H ADO input port is 55H.
Transcribed Image Text:Bus Demultiplexing The figure below shows a schematic ALE Enable that uses: G uProcessor a latch and the ALE signal to demultiplex the bus (AD7-ADo). While executing the instruction IN 8AH, the port address is duplicated on low-order (A7-A,) and high-order (Ag-A15) address buses. At the 3rd machine cycle (MC3: I) of the IN instruction Specify: (i) the contents of the demultiplexed low-order bus (A7-A,), (ii) the contents of the high-order bus (Ag-A15), (iii) and the contents of the multiplexed bus (AD7-AD,). Assume that data read from the Multiplexed bus AD7 A7 Output of the lat Latch AD, Ao Demultiplexed t D7-Do MC3: I 1/O Read T2 T3 A7 OUTPUT OF Port Address LATCH ??H ??H ??H A, A15 Port Address ??H ??H ??H Ag ALE AD, ??H ??H ??H ADO input port is 55H.
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