2. Consider a 16-bit processor in which the following appears in main memory, starting at location 200: Load to AC Mode 200 201 500 202 Next Instruction 399 999 400 1000 500 1100 800 1400 1000 1600 The first part of the first word indicates that this instruction loads a value into an accumulator. The mode field specifies an addressing mode and if appropriate, indicates a source register; Assume that when used, the source register is R1, which has a value of 400. There is also an index register (XR) that contains 100. The value of 500 in location 201 may be part of the address calculation. Assume that location 399 contains the value 999, location 400 contains the value 1000, and so on. Determine the effective address and the operand to be loaded for the following address modes: Addressing Mode Effective Address (EA) Content of AC Direct Immediate Indirect Relative Register Register Indirect Displacement Autoincrement Autodecrement
2. Consider a 16-bit processor in which the following appears in main memory, starting at location 200: Load to AC Mode 200 201 500 202 Next Instruction 399 999 400 1000 500 1100 800 1400 1000 1600 The first part of the first word indicates that this instruction loads a value into an accumulator. The mode field specifies an addressing mode and if appropriate, indicates a source register; Assume that when used, the source register is R1, which has a value of 400. There is also an index register (XR) that contains 100. The value of 500 in location 201 may be part of the address calculation. Assume that location 399 contains the value 999, location 400 contains the value 1000, and so on. Determine the effective address and the operand to be loaded for the following address modes: Addressing Mode Effective Address (EA) Content of AC Direct Immediate Indirect Relative Register Register Indirect Displacement Autoincrement Autodecrement
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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Question
Consider a 16-bit processor in which the following appears in main memory, starting at location 200:
B.
The first part of the first word indicates that this instruction loads a value into an accumulator. The mode field specifies an addressing mode and if appropriate, indicates a source register; Assume that when used, the source register is R1, which has a value of 400. There is also an index register (XR) that contains 100. The value of 500 in location 201 may be part of the address calculation. Assume that location 399 contains the value 999, location 400 contains the value 1000, and so on. Determine the effective address and the operand to be loaded for the following address modes:
Transcribed Image Text:2. Consider a 16-bit processor in which the following appears in main memory, starting at location 200:
Load to AC Mode
200
201
500
202
Next Instruction
399
999
400
1000
500
1100
800
1400
1000
1600
The first part of the first word indicates that this instruction loads a value into an accumulator. The mode
field specifies an addressing mode and if appropriate, indicates a source register; Assume that when
used, the source register is R1, which has a value of 400. There is also an index register (XR) that contains
100. The value of 500 in location 201 may be part of the address calculation. Assume that location 399
contains the value 999, location 400 contains the value 1000, and so on. Determine the effective address
and the operand to be loaded for the following address modes:
Addressing Mode Effective Address (EA)
Content of AC
Direct
Immediate
Indirect
Relative
Register
Register Indirect
Displacement
Autoincrement
Autodecrement
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