Essentials of Computer Organization and Architecture
5th Edition
ISBN: 9781284123036
Author: Linda Null
Publisher: Jones & Bartlett Learning
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Chapter 5, Problem 22E
Program Plan Intro
Immediate addressing mode:
In immediate addressing mode, the instruction is immediately followed by the data which means that the data that is to be used is already given in the instruction itself.
Example:
ADD R4, #4
This instruction is used to add the data 4 immediately with the contents of register R4.
Direct addressing mode:
The address of the instruction that includes address of an operand is known as direct addressing.
Example:
MOV R3, 46H
This instruction is used to move the data present at the location 46H to register R3.
Indirect addressing mode:
The address of the instruction that includes actual operand is known as indirect addressing.
Example:
MOV R2, 37H
This instruction is used to move the content of address present at 37H to register R2.
Indexed addressing mode:
The address of the operand is acquired by aggregating the contents related to general register to index register that contains constant value.
Example:
MOV R3, R4÷DPTR
This instruction is used to move the content of the register and given constant memory location to register R3.
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Given the following Extended-BNF grammar of the basic mathematical expressions:
Show the derivation steps for the expression: ( 2 + 3 ) * 6 – 20 / ( 3 + 1 )
Draw the parsing tree of this expression.
SEE IMAGE
Whentheuserenters!!,themostrecentcommandinthehistoryisexecuted.In the example above, if the user entered the command:
Osh> !!
The ‘ls -l’ command should be executed and echoed on user’s screen. The command should also be placed in the history buffer as the next command.
Whentheuserentersasingle!followedbyanintegerN,theNthcommandin the history is executed. In the example above, if the user entered the command:
Osh> ! 3
The ‘ps’ command should be executed and echoed on the user’s screen. The command should also be placed in the history buffer as the next command.
Error handling:
The program should also manage basic error handling. For example, if there are no commands in the history, entering !! should result in a message “No commands in history.” Also, if there is no command corresponding to the number entered with the single !, the program should output "No such command in history."
Activity No.
Activity
Time (weeks)
Immediate Predecessors
1
Requirements collection
3
2
Requirements structuring
4
1
3
Process analysis
3
2
4
Data analysis
3
2
5
Logical design
50
3,4
6
Physical design
5
5
7
Implementation
6
6
c. Using the information from part b, prepare a network diagram. Identify the critical path.
Chapter 5 Solutions
Essentials of Computer Organization and Architecture
Ch. 5 - Prob. 1RETCCh. 5 - Prob. 2RETCCh. 5 - Prob. 3RETCCh. 5 - Prob. 4RETCCh. 5 - Prob. 5RETCCh. 5 - Prob. 6RETCCh. 5 - Prob. 7RETCCh. 5 - Prob. 8RETCCh. 5 - Prob. 9RETCCh. 5 - Prob. 10RETC
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