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What is the main function of primary memory in a computer system?
What is the main function of primary memory in a computer system?
- Access data at least 10msec faster than disk access
- Store data and code while executing a program (correct)
- Hold the CPU registers
- Store temporary and partial results of calculations
Where do CPU registers reside?
Where do CPU registers reside?
- On the CPU chip (correct)
- In the main memory
- In primary memory
- On the hard disk
What is the typical access time for main memory?
What is the typical access time for main memory?
- A few nanoseconds
- Measured in seconds
- At least 10 milliseconds
- A few tens of nanoseconds (correct)
Which memory is purely electronic and volatile?
Which memory is purely electronic and volatile?
What determines the size and number of programs that can be run simultaneously?
What determines the size and number of programs that can be run simultaneously?
Which memory has access time measured in seconds?
Which memory has access time measured in seconds?
What type of memory is arranged as a matrix of 'memory cells' laid out in rows and columns?
What type of memory is arranged as a matrix of 'memory cells' laid out in rows and columns?
In a memory with 16M addresses, what is the width of the address bus?
In a memory with 16M addresses, what is the width of the address bus?
Which type of memory is volatile and requires power to retain data?
Which type of memory is volatile and requires power to retain data?
Which type of memory is used in constructing a larger memory in terms of memory address space or word length?
Which type of memory is used in constructing a larger memory in terms of memory address space or word length?
What is the capacity of a memory if the address bus width is 8 bits and the data bus width is 8 bits?
What is the capacity of a memory if the address bus width is 8 bits and the data bus width is 8 bits?
What naming convention represents 8 by 32 primary memory?
What naming convention represents 8 by 32 primary memory?
What type of memory retains data even without power?
What type of memory retains data even without power?
What type of RAM is a volatile form of memory?
What type of RAM is a volatile form of memory?
What does $SRAM$ stand for?
What does $SRAM$ stand for?
What does primary memory refer to?
What does primary memory refer to?
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Study Notes
Primary Memory
- The main function of primary memory is to hold data and program instructions temporarily while the CPU processes them.
- CPU registers reside in primary memory.
Memory Characteristics
- Main memory has a typical access time of nanoseconds.
- Primary memory is purely electronic and volatile, meaning it loses data when power is turned off.
- The size and number of programs that can be run simultaneously are determined by the available primary memory.
Memory Types
- Magnetic disk memory has access time measured in seconds.
- Main memory is arranged as a matrix of 'memory cells' laid out in rows and columns.
- Volatile memory requires power to retain data and loses data when power is turned off.
- Non-volatile memory retains data even without power.
Memory Architecture
- In a memory with 16M addresses, the address bus width is 24 bits.
- A larger memory can be constructed in terms of memory address space or word length using virtual memory.
- The capacity of a memory with an 8-bit address bus width and an 8-bit data bus width is 256 bytes.
- An 8x32 primary memory represents 8-bit addresses and 32-bit data.
- SRAM stands for Static Random Access Memory.
- SRAM is a volatile form of memory.
- Primary memory refers to the internal memory of a computer system.
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