Int n-unconditional branch instruction-microprocessor, Assembly Language

Assignment Help:

INT N : Interrupt Type N:-

In the interrupt structure of 8086/8088, 256 interrupts are distinct equivalent to the types from OOH to FFH. When an instruction INT N is executed, the TYPE byte N is multiplied by value 4 and the contents of IP and CS register of the interrupt  service routine will be taken from hexadecimal multiplication (Nx4) as offset address and 0000 as the segment address. In other terms, the multiplication of type N by value 4 (offset) points to a memory block in the 0000 segment, which have the IP and CS register values of the interrupt service routine.

For the execution of this instruction, the IF ought to be enabled.

Example :

Therefore the instruction INT 20H will find out the address of the interrupt service routine as follows:

INT       20H

Type* 4 = 20 * 4 = 80H

Pointer to CS and IP of the ISR is 0000: 0080 H

Given figure shows the arrangement of CS and IP  register addresses of the ISR in the interrupt vector table.

922_RET.jpg


Related Discussions:- Int n-unconditional branch instruction-microprocessor

Digital and embedded software, hi!im looking for someone who expert in an a...

hi!im looking for someone who expert in an assembly language and help me write the programmed!Thank you

Linking a program-microprocessor, Linking a program The DOS linking pro...

Linking a program The DOS linking program LINK.EXE links the different object modules of function library routines and source program to produce an integrated executable code o

Addressing mode of 8086-microprocessor, Addressing mode of 8086 : Addre...

Addressing mode of 8086 : Addressing mode specify a way of locating operands or data. Depending on the data types used the memory  addressing  modes and in the instruction  ,

String manipulation instruction-microprocessor, String Manipulation Instruc...

String Manipulation Instruction A series of words or data bytes are available in memory at consecutive locations, to be mention to individually or collectively, are known as by

Label-assemblers directive-microprocessor, LABEL :   The Label directive...

LABEL :   The Label directive which is used to assign a name to the current content of the location counter. At the beginning of the assembly process, the assembler start a loca

Counting Array Values(Programming exercises), Write an application that doe...

Write an application that does the following:(1) fill an array with 50 random integers; (2) loop through the array, displaying each value, and count the number of negative values;

Dec-micro processor, DEC : A powerful new Alpha 64 bit RISC computer ch...

DEC : A powerful new Alpha 64 bit RISC computer chip was introduced in the year 1977, as new VAX (Virtual Address Extension) Computer. The VAX was 32 bit computer line based on

Base convertor, take an integer and its base and the base in which you want...

take an integer and its base and the base in which you want to convert the number from user and perform conversion.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd