Queue operation-microprocessor, Assembly Language

Assignment Help:

Queue Operation :

326_queue operation.jpg

 

RQ/CT0, RQ/G1-Request/Grant:  These pins are utilized by other local bus masters, in themaximum mode, to force the processor to release the local bus at the end of the processor's current bus cycle. Each of the pins is bi- directional with RQ/GT () having greater priority than RQ/GT1.  RQ/GT pins have pull up internally resistors and can be left unconnected. The request& grant sequence is described below.

1) A pulse1 clock wide from another bus master requests the bus access to 8086.

2) During 74 (current)  or T, (next) clock cycle, a pulse 1 clock wide from 8086 to the requesting master,  show  that the 8086  has allowed  the local  bus  to float  and that it will enter  the "hold acknowledge" state at next clock cycle. The CPU's bus interface unit is probable to be disconnected from the local bus of the system.

 3) A 1 clock wide pulse from the master indicates to 8086 that the 'hold' request is just going to end and the 8086 can regain control of the local bus at the next clock cycle.

Thus each master to master exchange of the local bus is a sequence of 3 pulses. There might be at least 1 dead clock cycle after each bus exchange. The request &grant pulses are active low. Those are received for the bus requests when 8086 is performing I/O cycle or memory, the granting of the bus is ruled by the rules as discussed in case of, HLDA andHOLD in minimum mode.

Yet now, we have described the architecture and pin configuration of 8086. Next, we will study some operational features of 8086 based systems.

 

 


Related Discussions:- Queue operation-microprocessor

Plus and underline , What is the hex for + and - under with a sum involved

What is the hex for + and - under with a sum involved

LAB homework, 1. Write a program that calculates the Fibonacci series: 1, 1...

1. Write a program that calculates the Fibonacci series: 1, 1, 2, 3, 5, 8, 13, ….. (Except for the first two numbers in the sequence, each number is the sum of the preceding two n

Copy a string backwards, I can get it to copy the string but can''t get it ...

I can get it to copy the string but can''t get it to reverse it.

Rep-string manipulation instruction-microprocessor, REP : Repeat Instructi...

REP : Repeat Instruction Prefix :- This instruction is utilized as a prefix to other instructions. The instruction in which the REP prefix is provided, is executed repetitively

Signal descriptions of 8086-microprocessor, Signal descriptions of 8086 : ...

Signal descriptions of 8086 : described below are common for the maximum andminimum mode bothdata lines AD15 -AD0: These are the time multiplexed andmemory I/O address. Addre

Code using hla language, You have been hired by the Elbonian government to ...

You have been hired by the Elbonian government to write an Assembly program to help its workforce determine how much their tax will be. The tax laws in Elbonian are very simple. Th

Aaa-arithmetic instruction-microprocessor, AAA: ASCII Adjust after Additio...

AAA: ASCII Adjust after Addition operation the AAA instruction is executed after an ADD instruction that adds 2 ASCII coded operands to give a byte of outcome in the AL. The AAA i

Program to evaluate equation, Write a program to evaluate the following exp...

Write a program to evaluate the following expression. You are to evaluate the following equation: num1 - (input + num2) - (num3 + num4) Input will be a hex number input by

Any project ideas plz, can any one help me in my project by using assembly ...

can any one help me in my project by using assembly language

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