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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Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
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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
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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