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

Assignment, Write an assembly program that adds the elements in the odd ind...

Write an assembly program that adds the elements in the odd indices of the following array. Use LOOP. What is the final value in the register?

Assignment, Please let me know if you can do an assignment in the next 12 h...

Please let me know if you can do an assignment in the next 12 hours

Programming with an assembler-microprocessor, Programming with an assembler...

Programming with an assembler The procedure of hand-coding 8086 programs is somewhat tiresome; hence generally a programmer may find it hard to get a correct listing of the mac

Assembly help, use">http://www.raritanval.edu/uploadedFiles/faculty/cs/full...

use">http://www.raritanval.edu/uploadedFiles/faculty/cs/full-time/Brower/CISY256/2013Spring/CISY256%20Assembly%20Project.pdf use microsoft visual 2010 and http://www.asmirvine.c

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

Programming, Using the following table as a guide, write a program that ask...

Using the following table as a guide, write a program that asks the user to enter an integer test score between 0 and 100. The program should display the appropriate letter grade.

Write an assembly program to find out largest number, Program :  Write an...

Program :  Write an assembly program to find out the largest number from a given unordered array of 8-bit numbers that stored in the locations starting from a known address. S

Short-type-global-assemblers operator-microprocessor, SHORT  : The  SHO...

SHORT  : The  SHORT operator denoted to the assembler that only one byte is needed to code the displacement for a jump (for example displacement is within -128 to +127 bytes fr

Ocw-microprocessor, There are 3 kinds of OCWs. The command word OCWI is u...

There are 3 kinds of OCWs. The command word OCWI is utilized for masking the interrupt requests; when the mask bit corresponding to an interrupt request is value 1, then the requ

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