Computer System Design End Term: 31 August 2025, Set QDB1 (May 2025 term)

In a 4-bit system, the one’s complement of the binary number 1100 is 0011.

A synchronous counter triggers all flipflops using a common clock signal, while an asynchronous counter triggers each flipflop using the output of the previous flipflop.

In a system with 64 unique states, 6 flipflops are sufficient to represent all the states.

In a decoder, at any point, exactly one of the outputs is 1 and all the rest are 0s.

According to Moore’s law, if a computer system has 2 million transistors today, then it will have approximately 32 million transistors in 8 years.

Consider a mod-12 up counter with an initial state of 0011. What will be the state of the counter after 25 clock pulses?

Consider a 9-bit Johnson counter. What is the total number of unique states it can cycle through?

Consider a common bus architecture comprising of memory, and registers X, Y, Z.

The control word format is given below.

What would be the control word if you intend to perform a register transfer from register Y to register Z?

Note: Enter the value in hexadecimal format(e.g. 0x24).

Suppose we want to execute a data movement instruction, where we move the data present in register $R_3$ to register $R_{21}$.

Instruction: MOV $R_d, R_r$

$R_d$: Destination register, $R_r$: Source register

Operands: $0 \le d \le 31, 0 \le r \le 31$

Instruction Format:

What will be the hexadecimal machine code for the instruction?

Note: Enter the value in hexadecimal format (e.g., 0x2438).