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omputer science Computer architecture question No. 9 Quick response!

omputer science Computer architecture question No. 9 Quick response!

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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Computer science

Computer architecture question No. 9

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Suppose a hypothetical processor has the following characteristics: Instruction format: 3 4 15 Opcode Address Internal CPU registers: Program Counter (PC) = Address of instruction Instruction Register (IR) = Instruction being executed Accumulator A (ACA) = Temporary Storage - Address of register ACA is 200 Accumulator B (ACB) = Temporary Storage - Address of register ACB is 201 Partial list of opcodes: 0001 = Load ACA from memory 0010 = Store ACA to memory 0011 = Load ACB from memory 0100 - Store ACB to memory 0101 = ADD memory to ACB 0111 = INC (Increment register) 1000 = DEC (Decrement register) The following is the content of the memory, PC. and registers. The PC is pointing at memory location 400. CPU Registers 400 PC Memory 400 1500 401 3501 ACA 402 5502 ACB 403 7200 1500 IR 404 500 0001 501 0003 502 0001 1/0 Device 805 0008 806 0009 Trace the processor fetch and execute the 4 instructions shown in the memory, starting from memory location 400 to memory location 403 inclusive, and then answer the following 4 questions. What will be the content of register ACA once the processor has finished fetching and executing the instructions shown in memory locations 400-403? O 0001 O 0002 O 0003 O 0004
Transcribed Image Text:Suppose a hypothetical processor has the following characteristics: Instruction format: 3 4 15 Opcode Address Internal CPU registers: Program Counter (PC) = Address of instruction Instruction Register (IR) = Instruction being executed Accumulator A (ACA) = Temporary Storage - Address of register ACA is 200 Accumulator B (ACB) = Temporary Storage - Address of register ACB is 201 Partial list of opcodes: 0001 = Load ACA from memory 0010 = Store ACA to memory 0011 = Load ACB from memory 0100 - Store ACB to memory 0101 = ADD memory to ACB 0111 = INC (Increment register) 1000 = DEC (Decrement register) The following is the content of the memory, PC. and registers. The PC is pointing at memory location 400. CPU Registers 400 PC Memory 400 1500 401 3501 ACA 402 5502 ACB 403 7200 1500 IR 404 500 0001 501 0003 502 0001 1/0 Device 805 0008 806 0009 Trace the processor fetch and execute the 4 instructions shown in the memory, starting from memory location 400 to memory location 403 inclusive, and then answer the following 4 questions. What will be the content of register ACA once the processor has finished fetching and executing the instructions shown in memory locations 400-403? O 0001 O 0002 O 0003 O 0004
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