Pc bus and interrupt system-microprocessor, Assembly Language

Assignment Help:

PC Bus and Interrupt System

The PC Bus utilized a bus controller, address latches, and data transceivers (bidirectional data buffers).

1) Bus controller :( Intel 8288 Bus Controller) coordinates activities on bus. It converts clock signal and CPU status into bus control signals. These control signals direct operations  of data transceivers, latches and the I/O bus

2) Address latches:  these are buffers for the address lines. They consider 2 reasons, fill the speed gap between the CPU and other devices; and permit the CPU pins to be utilized for other purposes.

3) Data transceivers:  it is bidirectional data buffers

Interrupt processing: interrupt processing follows the below steps:

  • When an external device requests for an interrupt then the CPU initiates a special sequence of bus cycles, that called Interrupt-acknowledge sequence
  • The external device known the interrupt-acknowledge sequence by decoding the bus control signals

 

Once the external device recognizes the acknowledge, then it places the interrupt vector number on the data bus (through interrupt controller, in the case of IBM PC)

After  the  CPU  receives  the  interrupt  vector,  it  start  the  standard  interrupt-initiation   sequence: forming the interrupt vector address; then  it is starting execution of the interrupt handler routine.

 


Related Discussions:- Pc bus and interrupt system-microprocessor

Pointer and index registers-microprocessor, Pointer and Index Registers ...

Pointer and Index Registers The pointers contain offset within the specific segments. The pointers BP, IP and SP generally containoffsets within thedata, code and stack segment

C#, * * * * **** ...

* * * * **** * * * * * How can i print this help me pls

Merge Sort, Write a program to merge two sorted arrays to create a third so...

Write a program to merge two sorted arrays to create a third sorted array containing all values from the two original arrays. Merge is a key component to the mergesort algorithm.

Program, move a byte string ,16 bytes long from the offset 0200H to 0300H i...

move a byte string ,16 bytes long from the offset 0200H to 0300H in the segment 7000H..

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

Formulate the linear programming model , Print Media Advertising (PMA) has ...

Print Media Advertising (PMA) has been providing a contract to market Buzz Cola via newspaper ads in a main southern newspaper. Full-page ads in the weekday editions (Monday throug

Operating System, Why is the capability to relocate processes desirable?

Why is the capability to relocate processes desirable?

Write a program to find the average of the array , Write a program on the a...

Write a program on the assembly language to do the following: 1- Allocate array with 32bit 100 element 2- Prompt the user to enter the maximum or the upper bound of the rando

8086, Ask(2) Write a program to mask bits D3D2D1D0 and to set bits D5D4 and...

Ask(2) Write a program to mask bits D3D2D1D0 and to set bits D5D4 and to invert bits D7D6 of the AX register question #Minimum 100 words accepted#

Write an assembly program to design an array, 1- Write an assembly program ...

1- Write an assembly program that:   a- Defines an array of 10 (word type)elements;   b- Finds out the number of negative elements   c- Calculate the summation of the posi

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