problem 1: describe what SIM is. Describe the bit pattern of the accumulator for SIM instruction.

problem 2: List all the operating modes of 8155A programmable device.

problem 3: prepare a brief note on any of the applications of the microprocessors.

problem 4: Describe the DMA controller 8257?

problem 5: Draw the block diagram of 8255 microprocessor and describe its working. What do you mean by Control Word?

Find out the control word for the given configuration of 8255:

Port A – Output
Mode of port A – Mode 1
Port B – Output
Mode of port B – Mode 0
Port C lower (pins PC0 – PC2) – Output

problem 6: What do you mean by 8254? Describe its different operating modes. prepare down its areas of applications?

problem 7: Describe main components of 8259 with the help of appropriate diagram.

problem 8: Describe USART in detail.

problem 9: Describe the functional diagram of keyboard and the display controller.

problem 10: Describe the functional diagram of 8155 and illustrate its control word.