8085 Microprocessor Quiz

Which signal is used to indicate the completion of a memory read operation in 8085?

• RD

• WR

• INTA

• ALE

What is the function of the IN instruction in 8085?

• Input data from a port to the accumulator

• Output data from the accumulator to a port

• Halt the processor

• Read data from memory

During the Memory Write Cycle, which signal is activated?

• RD

• WR

• INTA

• IO/M

What state is the 8085 microprocessor in when it is not executing any instruction?

• Wait State

• Hold State

• Halt State

• Ready State

Which instruction is used to output data from the accumulator to an output port?

• IN

• OUT

• STA

• LDA

Which interrupt has the highest priority in 8085?

• RST7.5

• RST6.5

• RST5.5

• TRAP

What is the purpose of the INTA signal?

• To acknowledge the IN instruction

• To acknowledge the interrupt request

• To acknowledge memory read operation

• To acknowledge memory write operation

Which peripheral device is used for interfacing a keyboard and display with 8085?

• 8155

• 8255

• 8279

• 8251

The programmable peripheral interface (PPI) 8155 consists of how many ports?

• 1

• 2

• 3

• 4

What does the RST6.5 interrupt in 8085 do?

• Resets the microprocessor

• Triggers an interrupt vector at 0034H

• Triggers an interrupt vector at 0024H

• Triggers an interrupt vector at 0044H