Subject 2018 Question Paper — Government College of Engineering and T…
The 2018 Subject previous year question paper (Government College of Engineering and Technology, Jammu), with every question and its marks.
- University: Government College of Engineering and Technology, Jammu
- Course: MICROPROCESSOR 8085-COURSE NO. COM-503
- Branch: Comp. Engg.
- Year: 2018
- Paper: end-term
- Duration: 180 minutes
- Total marks: 100
Instructions
- Attempt Five questions in all, selecting at least two from each Section.
Questions
Section-A
- Q1. (a) Explain the architecture, data flow and instruction execution of 8085 microprocessor. (10) (b) With timing diagram, explain the memory read operation in 8085 microprocessor. (10) [20 marks]
- Q2. (a) Describe the instruction format and addressing modes of 8085 microprocessor. (10) (b) Write an assembly language program based on 8085 microprocessor instruction set to search the smallest data in a set. (10) [20 marks]
- Q3. (a) With suitable example, discuss about 8085 microprocessor instructions used for data manipulation and arithmetic groups. (10) (b) Write an assembly language program based on 8085 microprocessor instruction set to find the square root of data from 1 to n using Lookup table. (10) [20 marks]
- Q4. (a) Explain the purpose of the following signals in 8085 : (10) (i) READY (ii) AD0-AD7 (iii) HOLD (iv) IO/M (v) INTR. (b) Write an assembly language program based on 8085 microprocessor instruction set to transfer the data from one set of memory location to another. (10) [20 marks]
Section B
- Q5. (a) Explain the operation of 8255 PPI Port A programmed as input and output in Mode 1 with necessary handshaking signals. (10) (b) Show and explain the input interfacing with 8085 microprocessor. (10) [20 marks]
- Q6. What is DMA ? Which hardware pins are used for DMA control ? Draw and explain the architecture of 8237 DMA controller. Explain the various modes of operation of DMA controller. (20) [20 marks]
- Q7. (a) Draw and explain the block diagram of 8254 software programmable timer. Explain how the GATE input controls its operation in any two modes of operation. (10) (b) Design a memory system for 8085 such that it should contain 2KB of EPROM and 2 KB of RAM with starting address 0000H and 6000H. (10) [20 marks]
- Q8. (a) Write the control word need to perform the following : (10) (i) Enable Channels 0, 3 and Disable Channels 1,2 (ii) Disable rotating priority and extended write, Enable auto load and TC stop. Write an initialization program to transfer 256 bytes of data from a peripheral to memory starting at 2050H. After the transfer the DMA operation should be terminated. (b) Explain with neat waveforms Mode 1 operation of 8253. Describe the role of Gate input in this mode. (10) [20 marks]