Computer Science Illuminated
6th Edition
ISBN: 9781284055917
Author: Nell Dale, John Lewis
Publisher: Jones & Bartlett Learning
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Chapter 6, Problem 27E
a.
Program Plan Intro
Instruction Specifier:
- The instruction specifier is used to store the binary value of the instruction.
- It instructs the machine regarding which operation has to be performed.
- Every instruction uses instruction specifier.
- The instruction specifier is 8 bits (1 byte) long.
- The first four or five bits are used to represent the operation code.
- The last three bits are used to represent the addressing mode.
- Immediate addressing mode (000)
- Direct addressing mode (001)
Diagrammatic representation of instruction specifier:
The instruction specifier is depicted as given below:
Explanation of Solution
b.
Direct addressing mode:
- The last three bits of the instruction specifier is used to refer the addressing mode.
- Immediate addressing mode (000)
- Direct addressing mode (001)
- In direct addressing mode, the operand contains the address of the data that is to be loaded into the accumulator.
- If the last three bits of the instruction specifier is “001”, then the address of the data will be available in the operand specifier...
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I need help creating the network diagram and then revising it for the modified activity times.
Activity No.
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Requirements collection
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Process analysis
3
2
4
Data analysis
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Logical design
50
3,4
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Physical design
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c. Using the information from part b, prepare a network diagram. Identify the critical path.
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.
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Chapter 6 Solutions
Computer Science Illuminated
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