25 Questions
What is the size of the main memory in the MARIE architecture?
4K words
What is the size of the data words and instructions in the MARIE architecture?
16-bit
How many bits are used for the opcode and address in the MARIE instruction format?
4 for opcode, 12 for address
Which of the MARIE registers is responsible for holding the memory address of an instruction or operand?
Memory Address Register (MAR)
Which of the MARIE registers is responsible for holding the data after its retrieval from, or before its placement in, memory?
Memory Buffer Register (MBR)
What is the number of bits required to access one of the 16 registers in the system?
4 bits
What is the number of bits required for a memory address in the 4K memory system?
12 bits
Which ISA is described as having an infix expression of Z = X * Y + W * U?
Three-address ISA
Which ISA is described as having a postfix expression of Z = X Y * W U * +?
Stack ISA
Which technique can be used to recover some of the space wasted by instructions that require no operands in a fixed-length instruction set?
Expanding opcodes
What does the output register, OutREG, in the MARIE architecture do?
Holds data ready for the output device
How are the registers connected with the main memory in the MARIE architecture?
Through separate connections and a common data bus
What is the role of an instruction set architecture (ISA) in a computer system?
Defines the format of instructions and machine operations
How is each device on the bus identified in the MARIE architecture?
Through a unique number set on the control lines
What purpose do separate connections between the ALU and other devices serve in MARIE architecture?
Enable data transfer without using the main data bus
What is the purpose of the MARIE model computer?
To provide a simple model for illustrating basic computer system concepts
What is the relationship between the number of memory banks and the low-order bits used for bank selection in low-order interleaving?
The number of memory banks is equal to the number of low-order bits used for bank selection.
What is the purpose of interrupts in a computer system?
To allow the CPU to respond to high-priority events that occur during program execution.
What is the difference between maskable and nonmaskable interrupts?
Maskable interrupts can be ignored by the CPU, while nonmaskable interrupts cannot.
What is the purpose of the low-order bits in low-order interleaving?
To select the memory bank to be accessed.
In instruction pipelining, which stage is responsible for fetching the operands?
S4
What is the purpose of instruction pipelining in CPUs?
To increase instruction level parallelism
Which addressing mode was discussed in the example provided?
Base-offset addressing mode
What is the main benefit of breaking the fetch-decode-execute cycle into smaller steps in CPUs?
To allow parallel execution and increase throughput
In a six-stage pipeline, what does the fifth stage typically involve?
Executing the instruction
Test your knowledge on memory organization and interrupts in computer systems. This quiz covers topics such as low-order interleaving, memory banks, addressing, and interrupts during program execution.
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