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2- Consider the internal structure of a pseudo-CPU discussed in class. Suppose the pseudo-CPU can be used to implement the hypothetical instructions given below (Actually, these are instructions from PDP-8, which is the first commercially successful minicomputer from the 60's). Give the sequence of microoperations required to implement the Fetch and Execute cycle for each of the instructions shown below. Your solution should result in minimum number of microoperations. Assume PC is currently pointing to the instruction and only PC and AC have the capability to increment itself. Increment and skip if zero: ALU AC IR CU External control signals PC ISZ Internal Data Bus Internal control signals TEMP Y; M(Y) M(Y) + 1, If(M(Y)+1=0) Then PC PC +1 ++ MDR MAR To/from memory and I/O devices

2- Consider the internal structure of a pseudo-CPU discussed in class. Suppose the pseudo-CPU can be used to implement the hypothetical instructions given below (Actually, these are instructions from PDP-8, which is the first commercially successful minicomputer from the 60's). Give the sequence of microoperations required to implement the Fetch and Execute cycle for each of the instructions shown below. Your solution should result in minimum number of microoperations. Assume PC is currently pointing to the instruction and only PC and AC have the capability to increment itself. Increment and skip if zero: ALU AC IR CU External control signals PC ISZ Internal Data Bus Internal control signals TEMP Y; M(Y) M(Y) + 1, If(M(Y)+1=0) Then PC PC +1 ++ MDR MAR To/from memory and I/O devices

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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2- Consider the internal structure of a pseudo-CPU discussed in class. Suppose the pseudo-CPU can be used to implement the hypothetical instructions given below (Actually, these are instructions from PDP-8, which is the first commercially successful minicomputer from the 60's). Give the sequence of microoperations required to implement the Fetch and Execute cycle for each of the instructions shown below. Your solution should result in minimum number of microoperations. Assume PC is currently pointing to the instruction and only PC and AC have the capability to increment itself. Increment and skip if zero: ALU AC IR CU External control signals PC ISZ Internal Data Bus Internal control signals MDR TEMP Y; M(Y) M(Y) + 1, If(M(Y)+1=0) Then PC PC +1 韓 MAR To/from memory and I/O devices
Transcribed Image Text:2- Consider the internal structure of a pseudo-CPU discussed in class. Suppose the pseudo-CPU can be used to implement the hypothetical instructions given below (Actually, these are instructions from PDP-8, which is the first commercially successful minicomputer from the 60's). Give the sequence of microoperations required to implement the Fetch and Execute cycle for each of the instructions shown below. Your solution should result in minimum number of microoperations. Assume PC is currently pointing to the instruction and only PC and AC have the capability to increment itself. Increment and skip if zero: ALU AC IR CU External control signals PC ISZ Internal Data Bus Internal control signals MDR TEMP Y; M(Y) M(Y) + 1, If(M(Y)+1=0) Then PC PC +1 韓 MAR To/from memory and I/O devices
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