74F244 that is connected to port 7. Include in the solution the steps required to get the address for the port 7 before writing polling instruction. Vec
74F244 that is connected to port 7. Include in the solution the steps required to get the address for the port 7 before writing polling instruction. Vec
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
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Publisher:James Kurose, Keith Ross
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Question
![For the circuit in Figure 1. write a sequence of instruction to poll switch at 16 of
74F244 that is connected to port 7. Include in the solution the steps required to get the address for
the port 7 before writing polling instruction.
WR
CLK
ALE
P₁
CLK
Ag-As
2 m KH
8086
MPU
MNMX
ADAD
MIO
DT/R
DEN
RD
AD-AD
AIL
74F373
(2)
Address
latch
CE
74F245
Transceiver
bi-directional)
DIR
Demultiplexing
P₁
74F138
Input/Output P
Address
decoder
Decoder
74F374
Output
Port
74F244
Input
Port
Buffer
Latch or buffer
Input/output](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F0f8a22b8-9828-40a3-b15f-5df7162fb338%2Fd88c14b4-7ec7-424a-b04b-a83de405e203%2Fif2kvhs7_processed.jpeg&w=3840&q=75)
Transcribed Image Text:For the circuit in Figure 1. write a sequence of instruction to poll switch at 16 of
74F244 that is connected to port 7. Include in the solution the steps required to get the address for
the port 7 before writing polling instruction.
WR
CLK
ALE
P₁
CLK
Ag-As
2 m KH
8086
MPU
MNMX
ADAD
MIO
DT/R
DEN
RD
AD-AD
AIL
74F373
(2)
Address
latch
CE
74F245
Transceiver
bi-directional)
DIR
Demultiplexing
P₁
74F138
Input/Output P
Address
decoder
Decoder
74F374
Output
Port
74F244
Input
Port
Buffer
Latch or buffer
Input/output
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