Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Draw and elucidate the block diagram of programmable interrupt controller 8259.
The 8259A adds 8 vectored priority encoded interrupts to microprocessor. It can be expanded to 64 interrupt requests by employing one master 8259A and 8 slave units. CS and WR should be decoded. Other connections are direct to microprocessor.
Pins D7 - D0: bidirectional data connection, IR7 - IR0: Interrupt request, used to request an interrupt and connect to a slave in a system with multiple 8259A.
WR :-Connects to a write strobe signal (upper or lower in a 16 bit system) , RD :- Connects to IORC signal , INT :- Connects to INTR pin on the microprocessor from master and is connected to a IR pin on a slave and INTA :- Connects to INTA pin on the microprocessor. In a system only master INTA signal is connected A0:- Selects different command words with in 8259A, CS: - Chip select - enables 8259A for control andprogramming, SP/EN: - Slave Program (1 for master, 0 for slave)/Enable Buffer (controls data bus transceivers in a large microprocessor based system when in buffered mode) and CAS2-CAS0:- Used as outputs from master to the slaves in cascaded systems.
What is page fault? Its types? Page fault refers to the situation of not having a page in the major memory when any process references it. There are two kinds of page fault :
DATA DICTIONARY ON ONLINE QUIZ SYSTEM
Units of artificial neural networks: However the input units simply output the value that was input to them from the example to be propagated. So every other unit in a network
Likewise to arrays but is preferred over an array due to of the following reasons. 1. A collection objects uses less Memory than an array. 2. It gives methods to add and dele
Name some Popular Internet Browsers There are many internet browers are available on internet. Some Popular Internet Browsers are: Internet Explorer, Netscape Navigato
Your task is to propose a business that has a Web presence on the Internet. Your business may be an online only business or a so-called "clicks and mortar" business. You
By using Rwatch, Awatch command in GDB we can set read or write watchpoint for a variable.
Different systems that can participate in grid computing as platform are: Windows 3.1, 95/98, NT, 2000 XP , DOS, OS/2, , supported by Intel ( x86); Mac OS A/UX (Unix) sup
How and when race conditions happen in process control? How can it be avoided? b. Differentiate among following functions giving related syntax: (i) fork and vfork (ii) w
What is the use of status command, data output command, and data input command. A status command is used to test a variety of status conditions in the interface and the periphe
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd