UNIT III: Assembly Language programming, Interrupts, Timing diagram: Questions and Notes

UNIT III: Assembly Language programming : Assembly Language programming with C/C++, Interrupt and Timing diagrams: Using Assembly Language with C/C++ for linking C/C++ into assembly language, Basic Programs – Use of BIOS and DOS Interrupts in assembly & C/C++, Interrupts of 8086 microprocessors, Timing diagram of 8086 microprocessor.

Syllabus Source:  

https://csvtu.ac.in/ew/download/b-tech-5th-semester-5/?wpdmdl=14364&refresh=63c24614a8a6f1673676308

👉Prerequisite: Study Following in detail before Attempting the Questions of this Unit.

1. INTERRUPTS?                            

2. ISR, IRET.                            

3. IVT .                         

4. TYPES OF INTERRUPTS. 

5. BLOCK DIAGRAMS OF TWO MODES of 8086 [ALSO SEE MN/MX(bar) pin diagrams].

6. Timing Diagram of Read and Write operation 8086 in Both Modes.

😃QUESTIONS : COMPILED FROM PREVIOUS YEAR CSVTU QP. :

Q. Draw Interrupt vector table of 8086 microprocessor and explain its various kinds of interrupts.

Interrupts in 8086:

While the CPU is executing a program, an interrupt breaks the normal execution of instructions, diverts its execution to some other program called Interrupt Service Routine (ISR).

Whenever an interrupt occurs the processor completes the execution of the current instruction and starts the execution of an Interrupt Service Routine (ISR) or Interrupt Handler. 

ISR is a program that tells the processor what to do when the interrupt occurs. At the end of the ISR the last instruction should be IRET. After the execution of ISR, control returns back to the main routine where it was interrupted.   

Q. Draw and Explain the Interrupt Vector Table. 

Q. Draw and Explain the Timing Diagram of Read and Write operation of Maximum Mode of 8086 Microprocessor.

Q. Draw the Timing diagram of the read and write cycle in minimum mode.

Q. Describe function of Maximum Mode pins/signals of 8086 Microprocessor. 

Q. Describe function of Minimum Mode pins/signals of 8086 Microprocessor. 

Q. Give the Maximum Mode of Operation of 8086 Microprocessor .

Q. Give the Minimum Mode of Operation of 8086 Microprocessor.

Ans: 

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