1. How many bits are required to address a 16 Giga on 64 bits (16 G x 64 bits) main memory if

1. Main memory is byte addressable? ______

2. Main memory is word addressable? ______

2. Suppose that a 64 Mega x 16 bits main memory is built using 16M x 8 bits chips of RAM and memory is word addressable.

1. How many RAM chips are necessary? ______

2. How many RAM chips are needed for each memory word? _______

3. How many address bits are needed for each RAM chip? _______

4. How many address bits are needed for all memory? _______

3. A digital computer has a memory unit with 32 bits per word. The instruction set consists of 127 different operations. All instructions have an operation code part (opcode), and an address part (allowing for only one address). Each instruction is stored in one word of memory.

1. How many bits are needed for the opcode? ________

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

3. What is the maximum allowable size for memory? _________

4. Write the following MARIE assembly language equivalent of the following machine language instructions

1. 0001 0010 0000 0100
2. 0010 0010 0000 0110
3. 1001 0000 0000 1011
4. 0111 0000 0000 0000

5. Please fill the Binary contents of memory address and hex contents of memory address in the following table:

Program

Hex Memory Address	Instruction	Binary contents of Memory Address	Hex Contents of Memory Address
200	Load 204
201	Subt 205
202	Store 206
203	Halt

Data

Hex Memory Address		Binary contents of Memory Address	Hex Contents of Memory Address
204		0000 0000 0010 1100	002C
205		0000 0000 0010 1101	002D
206		0000 0000 0000 0000	0000

After execution of this program in the memory cell 206 will be

Hex Memory Address		Binary contents of Memory Address	Hex Contents of Memory Address
206

The exercise is similar with the program to Add two numbers (table 4.3 page 200 book Linda Null)

Please use MARIE simulator to enter and run the program

Post a screen capture with simulator execution of your program.

6. What is the difference between hardwired control and microprogrammed control?