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Questions and Answers

What is the role of the processor in a computer architecture?

The processor controls fetching and execution of instructions and moves data between memory, registers, the arithmetic/logic unit, and I/O devices.

What is the role of memory in a computer architecture?

Memory stores instructions and data.

What is the role of I/O devices in a computer architecture?

I/O devices bring data into the system and send data out from the system.

What is a signal in the context of computer architecture?

A signal is a logical value represented as a voltage on a wire inside the machine, with binary values of on (1) and off (0). Signup and view all the answers

What is a bus in the context of computer architecture?

A bus is a group of signals with a specific purpose. Signup and view all the answers

What is the function of the Control Bus in a computer architecture?

The Control Bus is responsible for controlling the fetching and execution of instructions, as well as moving data between memory, registers, the arithmetic/logic unit (ALU), and I/O devices. Signup and view all the answers

What is the purpose of the Address Bus in a computer architecture?

The Address Bus is used to specify the memory location or I/O device that needs to be accessed. Signup and view all the answers

What is the role of the Data Bus in a computer architecture?

The Data Bus is responsible for transferring data between the processor, memory, and I/O devices. Signup and view all the answers

What is the significance of the M/IO# signal in a computer architecture?

The M/IO# signal is used to determine whether the system should access memory (M/IO# = 1) or an I/O device (M/IO# = 0). Signup and view all the answers

Define a bus in the context of computer architecture.

A bus is a group of signals that serve a specific purpose, such as transferring data or controlling the flow of information within a computer system. Signup and view all the answers

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Study Notes

General Computer Architecture

The processor controls the fetching and execution of instructions and moves data between memory, registers, the arithmetic/logic unit (ALU), and I/O devices.
Memory stores instructions and data.
I/O devices bring data into the system and send data out from the system.

Control Bus and Signals

A signal is a logical value represented as a voltage on a wire inside the machine, and is binary (on = 1, off = 0).
Each signal value has a specific function assigned to it, e.g., the memory or I/O select (M/IO#) signal.
M/IO# = 1 means access memory, while M/IO# = 0 means access an I/O device.
A bus is a group of signals with one purpose.

System Architecture

The processor is connected to the control bus, which includes the arithmetic logic unit (ALU), and C-Bus (M/IO#, W/R#, and D/C# signals).
The 32-bit address bus connects the processor to memory.
The 32-bit data bus connects the processor to memory and I/O devices.
Registers are part of the processor.