Explain the flag register in 8085 microprocessor.
[3 marks]Explain the following pins of 8085: (1) INTR (2) HOLD (3) SOD (4) READY
[4 marks]Draw the block diagram of internal architecture of 8085 and explain its working.
[7 marks]Explain the following instructions 1. LHLD 2. RAL 3. DAA
[3 marks]Explain demultiplexing of data and address bus of 8085.
[4 marks]Explain the timing diagram of the instruction MOV C,A (4FH ) stored in location 2005H is being fetched. Define T-state, Machine cycle and Instruction cycle.
[7 marks]Explain interfacing of 4KB EPROM with 8085 using decoder and gates as required. Assume starting address as 0000H.
[7 marks]Write a program to find 2’s complement of a number stored at 2050H and store result at 2055H.
[3 marks]Compare memory mapped I/Oand I/Omapped I/O.
[4 marks]What are interrupts? List and explain the interrupt available in microprocessor 8085?
[7 marks]Explain the concept of stack.
[3 marks]Explain arithmetic instructions of 8085.
[4 marks]Write an 8085 program to copy block of ten numbers starting from location 2050h to locations starting from 3050h.
[7 marks]State the difference between PUSH and POP instruction.
[3 marks]Explain the generation of control signals in 8085.
[4 marks]Draw the internal block diagram of 8259A and explain the functions of each block in detail.
[7 marks]Explain Machine level language and Assembly level language with examples.
[3 marks]Explain 8085 bus organization.
[4 marks]Write a program to count continuously in hexadecimal from FFH to 00H in a system with a clock period of 0.5 μs. Use register Cto set up 1 millisecond delay between each count and display the number at the output port1.1
[7 marks]How many memory locations can be addressed by microprocessor with 14 address lines? Also specify how many address lines are required for 2KB memory.
[3 marks]Load the hexadecimal numbers 56H and A9H in registers Dand E respectively and add them. If sum is greater than FFH, display 01H at output PORT0; otherwise display sum.
[4 marks]Draw the internal block diagram of 8255 and explain the functions of each block in details.
[7 marks]Explain the given pins of 8086. 1. ALE 2. DEN 3.MN/MX
[3 marks]Explain the modes of operation of 8086 microprocessor.
[4 marks]Explain the block diagram of 8086 microprocessor.
[7 marks]