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

Code, 1. Assembly code for the flow chart we did in the class about the sim...

1. Assembly code for the flow chart we did in the class about the simple I/O interface driver 2. Enhanced driver (flow chart and its assembly code) to cater for interruptions in th

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

Div-idiv-arithmetic instruction-microprocessor, DIV: Unsigned Division:- T...

DIV: Unsigned Division:- This instruction performs unsigned division operation. It divides an unsigned word or double word by a 16-bit or 8-bit operand. The dividend might be in t

Cisc characteristics-microprocessor, CISC Characteristics : The design...

CISC Characteristics : The design of an instruction  set for a computer  might take into consideration  not only machine language constraints,  but  also  the  requirements  i

Program to perform a conversion on characters in a text file, Write an asse...

Write an assembly language program to perform a rot13 1 conversion on characters in a text file.  The program should read charatcers from the input file, perform the rot13 convers

ROTATION, CANI GET HELP WRITTING THIS CODE

CANI GET HELP WRITTING THIS CODE

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.

Flag manipulation and processor control instructions , Flag Manipulation an...

Flag Manipulation and Processor Control Instructions These instructions control the functioning of available hardware inside the processor chip. These are categorized into thes

Can you write this Program for me please? , $NOMOD51 $NOSYMBOLS ;**********...

$NOMOD51 $NOSYMBOLS ;***************************************************************************** ; Spring 2013 Project ; ; FILE NAME : Project.ASM ; DATE : 3/30/20

Port mapped or mapped input output, Port Mapped I/O or I/O Mapped I/O I...

Port Mapped I/O or I/O Mapped I/O I/O devices are mapped into a separate address space. This is generally accomplished by having a different set of signal lines to denote a mem

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