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

End-endp-assemblers directive-microprocessor, END : END of Program:- Th...

END : END of Program:- The END directive marks the ending of the assembly language program. When the assembler comes across this END directive, it avoided the source lines avai

Counters, #question. counters using 8051.

#question. counters using 8051.

Org-proc-assemblers directive-microprocessor, ORG : Origin:- The ORG di...

ORG : Origin:- The ORG directive directs the assembler to begin the memory allotment for the specific segment, code or block from the declared  address in the ORG  statement. W

LC-3 Program, Write an Lc-3 assembly language program to read in a sequence...

Write an Lc-3 assembly language program to read in a sequence of single-digit positive integers from the keyboard(one integer per line) until the sentinel value of 0 is reached and

Read architecture:look through-microprocessor, Read Architecture: Look Thro...

Read Architecture: Look Through Main memory that located is conflicting the system interface. The least concerning feature of this cache unit is that it remain between the proc

CONSTANTS, Ask question #MinimuWHAT ARE CONSTANTS AND WHAT DO THEY DO?m 100...

Ask question #MinimuWHAT ARE CONSTANTS AND WHAT DO THEY DO?m 100 words accepted#

Write a program, write a program that calculates the fibonacci series: exce...

write a program that calculates the fibonacci series: except for the first two numbers in the sequence

4 bit 2s complement multiplier, How to design 4 bit signed 2s complement m...

How to design 4 bit signed 2s complement multiplier?

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

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