IMP FOR GTU EXAM S-2015 DATE: 22/04/2015 1. Draw & Explain Pin Diagram Of 8085 2. Draw & Explain Block Diagram Of 8085. 3. Addressing Mode & Classification of Instruction. 4. Draw & Explain Bus Structure 5. Explain Flag Register, SP & PC. 6. Draw & Explain interfacing of ____B Memory With 8085. 7. Compare Memory Mapped Io& Io Mapped Io. 8. Draw & Explain Demultiplexing Of Address & Data Bus. 9. Draw & Explain Generation Of Control Signal 10.Explain Instruction: RIM, SIM, ROTATE, JUMP, CALL,RET, DAA, DAD, LHLD, P US H, POP 11.Timing Diagram Of: 1) STA 2) LDA 3) IN 4) OUT 5) MOV Rd, Rs. 6) Opcode Fetch operation 7) Memory Read operation. 8) Memory Wright operation. 9) I/O Read operation. 10) I/O Wright Machine Cycle. 12.What is A-to-D conversion? How does it happen? Explain with example. 13.8255: 1) 2) 3) 4) Draw and explain the functional block diagram Discuss the main applications Explain various operating modes of 8255A. Give the control word 14.8254: 1) Explain block diagram the function 2) Discuss different working modes of IC 8254 3) Explain control word format 15.8259: 1) Working of IC 8259A 2) Explain the block diagram of 8259 Programmable interrupt controller. What are its features? Explain the interrupt operation of 8259 in the simplest format. 3) Explain the initialization of 8259 interrupt controller. 16.8237: 1. Explain how the 8237 DMA controller transfers 64K bytes of data per channel. 2. Explain the functions of DMA controller with proper diagrams. 3. What do you mean by direct memory transfer? Explain 8257 DMA controller with block diagram. 4. Draw and explain the logical block diagram of the 8253 with functions of each block. ( 23/05/2012) 17.What is USART? Draw the functional block diagram of 8251 and explain function of each block. 18.Compare serial and parallel data transfer. (25/11/2011) 19.Write short note on Serial I/O lines, SOD and SID (25/11/2011) 20.Write an assembly language program generate time delay of __msec. Assume system freq. =__MHz 21.8086: 1. Architecture 2. Pin diagram 3. Mini and maxi mode 4. Memory segmentation 22.All Programs of Practical File.