Microprocessor 8085

In 8085 microprocessor is an 8-bit microprocessor designed by?

• IBM

• Dell

• Intel

• VAX

In 8085, 16-bit address bus, which can address up to?

• 16KB

• 32KB

• 64KB

• 128KB

There are _______ general purpose registers in 8085 processor

• 5

• 6

• 7

• 8

It is also a 16-bit register that works like a stack, which is always incremented/decremented by 2 during push & pop operations.

• Stack pointer

• Temporary register

• Flag register

• Program counter

What is true about the Program counter?

• It is an 8-bit register, which holds the temporary data of arithmetic and logical operations.

• When an instruction is fetched from memory then it is stored in the program counter

• It provides timing and control signal to the microprocessor

• It is a 16-bit register used to store the memory address location of the next instruction to be executed.

Flag register is an 8-bit register having __________ 1-bit flip-flops.

• 3

• 4

• 5

• 6

This signal is used as the system clock for devices connected with the microprocessor.

• X1, X2

• CLK OUT

• CLK IN

• IO/M

Which of the following is true about Control and status signals?

• These signals are used to identify the nature of the operation.

• There are 3 control signals and 3 status signals.

• Three status signals are IO/M, S0 & S1.

• All of the above

This signal indicates that another master is requesting the use of the address and data buses.

• READY

• HOLD

• HLDA

• INTA

MVI K, 20F is an example of?

• Immediate addressing mode

• Register addressing mode

• Direct addressing mode

• Indirect addressing mode