Question

Clark 202

Part 1: Approximately how many bits are required to address a 4M x 16 main memory if:

a. Main memory is byte addressable?

b. or Main memory is word addressable?

Part 2: Consider 256 x 8 RAM chips for the following:

a. About how many are needed to provide a memory capacity of 4096 bytes?

b. How many lines must go to each and every chip?

Part 3: Digital computers have a memory unit with 24 bits per each word. The instruction set consists

of 150 different operations. All instructions have an operation code part (opcode) and

an address portion (allowing for only one address). Each instruction is stored in approximately one word

of memory.

a. How many bits are needed for the opcode?

b. How many bits are left for the address part of the instruction?

c. What is the approximate maximum allowable size for memory?

d. Please explain what is the largest unsigned binary number that can be accommodated in one word

of memory

Part 4: Assume a 230-byte memory.

a. What are the smallest and highest addresses if memory is byte addressable?

b. What are the smallest and highest addresses if memory is word addressable,

assuming a 16-bit word?

c. What are the lowest and highest addresses if memory is word addressable,

assuming a 32-bit word?

Let me know if you have any questions.

Answer 1