Thursday, October 13, 2005
Main Memory
Two mark questions
1. What is main memory?
It is the central storage unit in computer, which communicates directly with CPU. It is relatively fast, and it hold programs and data for execution.
2. What are the two operating modes of RAM chips?
i) Static RAM – It has flip-flops to store binary information. The information stays till power is applied
ii) Dynamic RAM – It store binary information as charges in capacitors. Capacitors must be recharged to restored data
3. What are the advantages of static RAM and dynamic RAM?
Static RAM- It is easier to use, and has short read and write cycles
Dynamic Ram- reduces power consumption and large storage capacity in single memory chip
4. What is ROM?
ROM stands for read only memory. It holds permanently resident programs and tables that do not change its value after it is embedded in the computer chip once
5. What is bootstrap loader?
Bootstrap loader is a program, which starts the operating system when power is turned on. It resides in ROM
6. What are the differences between RAM and ROM?
i) RAM – Volatile storage
ROM – non-volatile storage
ii) RAM – Contents can be destroyed and new data can be written again. Hence it is Read/ Write memory
ROM- Data remain unchanged. Hence it is Read only memory
iii) RAM- Signals used are CS1, CS2, RD, WR and 7 address lines
ROM- Signals used are CS1, CS2, 9 address lines
7. Draw the block diagram of RAM chip (2)
8. What is high impedance state?
The state in which output does not carry a signal and has no logic significance
9. What are the uses of chip select signals in RAM chip?
CS1 is used for enabling the chip, and CS2 is to decode the address and also indicate about RAM/ ROM selection
10. Draw the block diagram of ROM chip (8)
11. What is memory address map?
Memory address map is a table, which specifies the memory address assigned to each chip, and also helps in selection of chip
Other questions:
1. Explain main memory, and the types of main memory (16)
2. Draw the block diagram of RAM and ROM and explain about them (10)
3. How memory is connected when 512 x 8 RAM and 512 x 8 ROM are needed? Explain in detail. (10) ¶ 8:37 PM
1. What is main memory?
It is the central storage unit in computer, which communicates directly with CPU. It is relatively fast, and it hold programs and data for execution.
2. What are the two operating modes of RAM chips?
i) Static RAM – It has flip-flops to store binary information. The information stays till power is applied
ii) Dynamic RAM – It store binary information as charges in capacitors. Capacitors must be recharged to restored data
3. What are the advantages of static RAM and dynamic RAM?
Static RAM- It is easier to use, and has short read and write cycles
Dynamic Ram- reduces power consumption and large storage capacity in single memory chip
4. What is ROM?
ROM stands for read only memory. It holds permanently resident programs and tables that do not change its value after it is embedded in the computer chip once
5. What is bootstrap loader?
Bootstrap loader is a program, which starts the operating system when power is turned on. It resides in ROM
6. What are the differences between RAM and ROM?
i) RAM – Volatile storage
ROM – non-volatile storage
ii) RAM – Contents can be destroyed and new data can be written again. Hence it is Read/ Write memory
ROM- Data remain unchanged. Hence it is Read only memory
iii) RAM- Signals used are CS1, CS2, RD, WR and 7 address lines
ROM- Signals used are CS1, CS2, 9 address lines
7. Draw the block diagram of RAM chip (2)
8. What is high impedance state?
The state in which output does not carry a signal and has no logic significance
9. What are the uses of chip select signals in RAM chip?
CS1 is used for enabling the chip, and CS2 is to decode the address and also indicate about RAM/ ROM selection
10. Draw the block diagram of ROM chip (8)
11. What is memory address map?
Memory address map is a table, which specifies the memory address assigned to each chip, and also helps in selection of chip
Other questions:
1. Explain main memory, and the types of main memory (16)
2. Draw the block diagram of RAM and ROM and explain about them (10)
3. How memory is connected when 512 x 8 RAM and 512 x 8 ROM are needed? Explain in detail. (10) ¶ 8:37 PM
