Archive for the ‘Computers and IT’ Category:

Guide To USB I2c

Generally, with a keyboard of an electronic musical instrument or computer keyboard, it is possible that more than one key is pressed at the same time. Depending on the design of the keyboard, it can recognize a maximum of two simultaneous key presses correctly (2 key roll over) or an n-key rollover.

Hinging upon the arrangement of the keys, the matrix may lead to false positives in the simultaneous activation of three or more keys. This may be detected as active keys that are not actually operated, this effect is referred to as phantom key and USB i2c.

To explain, a 6-key keyboard with two rows (A, B) and three columns (1, 2, 3) is taken as an example. U = A1, y = B2 = A2 and v are pressed simultaneously, it is not possible for the keyboard controller to distinguish, unlike when only x v or both are compressed. If set A is activated during scanning, the controller detects correct column 1 and 2 corresponding to u and v associated with USB i2c.

However, if bank B is active, the controller detects correct column 2 for y and falsely column 1 for x, because over y, v and u (of series B to column 2, the series a to column 1) has a connection with column 1.

In contrast, simultaneous actuation of w = z = A3 or B3 with u and y are not a problem and would be reliably detected. Generally, this effect occurs when three corners of a rectangle are pressed within the USB i2c matrix.

A common countermeasure is the key matrix to be arranged such that patterns do not occur at the usual key combinations. For example, that only very rarely more than one character keys must be pressed simultaneously while the combination of signs and caps lock is frequent.

In addition, some keyboards have a limit on the number of keys that they recognize when pressed simultaneously, for example, only two keys (2-key roll over).

Transfer to PC

Both the pressing and releasing of a key on the keyboard controller sends a code to the PC, which triggers an interrupt. The interrupt handler evaluates the scan code for each key that determines which key (Caps Lock, Num Lock, roles and introduction Shift , Ctrl, Alt , Alt Gr ) is the modifier which stores the result in the keyboard buffer and USB i2c.

The operating system or active application program works with software interrupts from this buffer and the associated scan code with a character (keycode) as number, letter or punctuation, etc.

That is, the keyboard provides only key numbers and non-ASCII characters. This link will only take place in the software of the PC operating system or application program.

Network Configuration And Change Management

The SDK adds the development libraries for mobile phones for Network Configuration and Change Management. It is therefore possible for the developer to create application projects for this system. To test the application, there are two possibilities: the developer can connect the phone to the Mac, then launch the application as a test to join the developer program, or launch the application being tested in iPhone Simulator
Interface Builder allows you to build an interface for Cocoa Touch manually, using drag and drop. It also allows an application to easily translate into several languages. In addition, it allows you to visually manage the Model-View-Controller pattern, connecting elements of an interface written for them, using drag and drop. Finally, the interface file is created and added to the Xcode project.

Instruments is a computer monitoring tool. It allows connection to the computer, observe real-time performance of the processor, once the application is launched on an Touch, but also, for example, the graphics engine or the accelerometer. In addition, it is also possible to monitor system performance in Simulator.

iPhone Simulator (formerly Aspen Simulator) is one of the tools developed specifically for the iPhone SDK. It simulates how a virtual iPhone software, which can run applications directly on the computer. The Multitouch movements are then reproduced manually with the mouse by the user, and it is possible to rotate the simulator with keyboard shortcuts. Furthermore, the user is able to choose which hardware and firmware version they wish to use.

The iOS system contains several limitations imposed by Apple. Among these are the system is closed (it is necessary to unleash the system to take advantage of some features not offered by the manufacturer: this is called the jailbreak)

The Adobe Flash is not supported and after Apple never will (mainly to extend the life of the battery and does not slow down the system), many video sites have replaced their video format by H.264 and HTML5 specifically for the iPad or iPhone. The operating system is designed for Apple devices, unlike other mobile operating systems like Android, MeeGo, and Windows Phone.

Since this mainly uses cellular functions and possibly 3G iPhone, which are available almost all the time, a process of this type lacks efficiency on the iPod Touch. Indeed, any function resembling Kill Switch has so far been found in the iPod Touch.

The Network Configuration and Change Management is considered by some as brutal as it simply removes the application without even informing the author. This means that Apple may decide at any time to remove any application without giving any reason. From there, one could consider that the firm uses this function for immoral purposes.

Anti Virus Support Sydney

The most simple computer viruses are composed of two essential parts sufficient to ensure the replication. A search routine, which is to search for files suitable to be infected by the virus and check that they do not already contain a copy, to avoid repeated infection of the same file.

A routine of infection, with the task of copying the viral code within each selected file from the search routine because it runs every time the infected file is opened, in a transparent way with respect to the user. Many viruses are designed to execute code extraneously for the purposes of replication and thus contain two other elements:

The activation routine, which contains the criteria according to which the virus decides whether or not to attack (eg, a date, or the attainment of a certain number of infected files). The payload, a sequence of instructions typically harmful to the host system, such as the deletion of certain files or displaying messages on the screen.

The virus can be encrypted and may change algorithm and/or key each time they are run, so they can contain three elements: a decryption routine, which contains the instructions to crack the code of the virus. an encryption routine, usually encrypted itself, which contains the procedure to encrypt each copy of the virus. A routine of mutation, which is responsible to modify the encryption and decryption routines for each new copy of the virus, which can be removed by Anti Virus Support Sydney.

Today, the x86 architecture is widely used – a typical representative of the CISC class – internally actually a RISC architecture, which decomposes the complex instructions provided in simple, RISC -like μ — code.

Another type of processor designs involves the use of the VLIW. There are several instructions that are summarized in one word. This is defined from the beginning, on which unit which instruction is running as shown by Anti Virus Support Sydney

How computer viruses spread

What distinguishes the computer viruses from computer worms is the mode of replication and dissemination: a virus is a fragment of code that can not be performed separately from a host program, while a worm is a program in itself. In addition, some worms exploit security vulnerabilities to spread, and therefore do not depend on fooling you to get it to perform.

Before the widespread use of Internet the prevailing means of dissemination of the virus from one machine to another was the exchange of floppy disks containing infected files or a boot sector virus. The preferred vehicle of infection is instead represented today by e-mail communication and peer to peer networks (eg, eMule).

Why Use Apple Repair Services

Irrespective of how long you have owned a phone or computer, there will come a point in time when you will need repairs. This is because when you use a device daily, it is susceptible to wear and tear and most often than not, accidents do happen. However, when this happens it is important to decide exactly where you are going to take your phone or computer to be repaired. While some people are looking for the cheapest quote when it comes to computer repairs, others are looking for the most reputable computer repair shop. Ultimately, it all depends on what you place high on your list of priorities.

While some people place the privacy of their personal data high on the list of priorities, others don’t. People who use computers for business purposes or work purposes will often want to protect their private data. Even those that use their computers for personal use wish to protect sensitive information such as pictures, passwords, etc.

Some people, on the other hand, are more concerned with getting a bargain when it comes to repairing their computer. So they are not so concerned about protecting personal information. It could also be that they don’t have much personal information stored on their computers and use it purely for gaming purposes. Ultimately, it is up to you to decide which is more important to you and then choose a computer repair service accordingly.

One of the best ways to find a reputable and reliable repair service is by speaking to family and friends. In most cases, word of mouth is the best form of advertising, and if a company is worth talking about and they have offered honest and reliable services, you will definitely hear about it. While computer centers and repair centers may place their own ads in magazines and even online, this is purely self-promotion, and they can promise you a number of things, however the only way to know whether they deliver or not is by speaking to people that you know and trust ho have used them before.

Ultimately, it is also in your best interest to take your device into a repair center that is experienced and knowledgeable about your phone or computer. So if you own an Apple device, you should take it into any of the Apple repair services around you. This will ensure that your device is in the best possible hands and is getting repaired by people who have experience working with the specific make and model each and every day.

Guide To Best Laptop Brands

The touchpad, trackpad or just pad is a touch input device that can control a cursor or facilitate navigation through a menu or any GUI of the Best Laptop Brands. Most touchpads are generally placed in the bottom of the laptop keyboards and take the role of mice on desktops. They are usually rectangular in shape and accompanied by 1, 2 or more buttons that represent the buttons on a mouse.

Finger position is calculated accurately based on mutual capacitance variations at various points to determine the center of the contact surface. The resolution of this system is up to 1/40 mm. You can also measure the pressure also makes the finger. You can not use pencils or other non-conductive materials as pointers. It is very resistant to the environment. Supports perfectly dust, humidity and static electricity. It is also lightweight, thin and can be flexible or transparent.

The netbook is designed to meet simple needs: web browsing, word processing, spreadsheets and viewing multimedia content. However, a netbook can run slower than a modern laptop computer when working with intensive applications (eg audio and video compression). In addition, it is possible to play video games when they do not burden too hard the chipset of these machines. Diskless models are well suited for safe use in transport, due to their robustness and their lightness.

Netbooks are at the crossroads between ultra-portable computers, personal digital assistants (PDA), handheld game consoles, portable video player, computer terminals, mobile, and aim to combine their qualities without their faults. The concept could be summed up in three words: connectivity, mobility and simplicity.

Several factors that led to the emergence of netbooks: modern ultra portable computers are expensive: however, they are faster and their screens have more pixels than netbooks, limited to a maximum of 1366 × 768 pixels. Mobile phones do not allow Skype video communication type (except Smartphone) and personal digital assistants (PDAs) have a small screen size.

The electronic data storage, flat panel displays and batteries on the Best Laptop Brands have evolved and wireless and broadband networks are spreading. Server-side applications are spreading and standards (communication protocols, file formats) are now stable.

A memory card reader allows reading and writing of memory cards such as SD cards. Memory Card Readers are available in both external as well as internal models. The external shape is a small box that plugs into a USB or FireWire to the PC or can be plugged in stick form directly into a USB socket. The internal form is located in the PC case as a permanently installed rack, usually in the 3.5 “format and is connected by cable to the motherboard.

Introduction To Anti Virus Support

A firewall is used by Anti Virus Support to prevent unwanted access to network services. It is geared to the address of the communication partners ( ie, “who is allowed to access what “). As a rule, can not prevent the exploitation of a vulnerability in the Network Service.

When utilizing the backward path, it cannot protect against access to vulnerabilities, if the communication partner can access the vulnerable areas of the program. Therefore, programs that are intended for network access, must be kept up to date to close known vulnerabilities. Some firewalls provide filters that limit the remote access to the used network service by, for example, the filtering of vulnerable ActiveX objects from web pages.

The browser can then no longer access embedded Web page objects, which also means that it can not be attacked via these objects. Alternatively, this behavior can also be reached through the configuration of the browser.

Depending on the type, a firewall can draw attention to the network access of a secretly installed malicious software at best, and sometimes even prevent their network access. Such success, however, is strongly influenced by the complexity of the harmful software. The exploitation of bugs in the networking implementation of the operating system can outsmart a firewall at best.

The effectiveness of a firewall can be compared with the safety of a car, for which there are also scenarios where it is unable to protect the driver. It is useful to put on the belt and at the same time not to drive carelessly with the knowledge of its limitations, so there must be an active Anti Virus Support on your computer.

Anti Virus Support: Filtering technologies

The simple filtering of data packets based on the network address is the basic function of all firewalls (in a TCP/IP network, meant for more accurate filtering of the ports and the IP address of the source and target system).

This stateful filtering is an advanced form of packet filtering. In order to restrict access to an established connection in more detail and better protect unauthorized access to the internal network.

A proxy filter is representative of the requesting client, it connects to the target system and forwards the response from the target system to the actual client. As it leads the communication itself, it can not only see, but also influences. Specializing in a particular communication protocol, such as HTTP or FTP, it can analyze the contiguous data, filter requests and make, if necessary, any adjustments.

Sometimes it serves to cache certain answers for faster processing of recurring requests. On a single device, often several such filters are used in parallel in order to serve different protocols.

Guide To Computer Repair Store

The notebook computer is a subtype of laptop computer which is characterized by being constituted by two hardware blocks of similar size and connected together by one or more hinges that allow the superposition. In particular, when the computer is not in use, the two blocks can be stacked to save space and facilitate the transport of the computer.

When using the computer, you must remove the two blocks instead. In fact, the upper block featues the display, the lower block, the keyboard (respectively the main user interface output and the main user interface for input of the notebook computer). And only two blocks away the dispay and the keyboard can be used. An additional benefit that is obtained by superimposing the two blocks is to protect the display and keypad: two components of the computer particularly delicate.

However, this does not apply to types that do not require a conventional picture tube. Other characteristics of a monitor are aspect ratio, the maximum vertical frequency from which a specific resolution (eg 1024 × 768 pixels) gives a refresh rate (eg 80 Hertz (Hz)), the brightness, the contrast, the reaction time and especially in liquid crystal displays, the number of pixels and the maximum viewing angle.


The fixed number and arrangement of the pixels makes it impossible for a monitor to process the call intended for another graphics mode signals correctly.

Even with tube monitor’s deflection coils allow only a minimal change of image and line frequency. Therefore, the hardware detection ensures the activation of an appropriate display driver, as well as an appropriate configuration of the graphics card.

In practice, this corresponds to the following two characteristics: a weight sufficiently content, all the major hardware components of computers form a single block even while the computer is used.

The mouse is an input device (control station) for computers. The development of graphical user interfaces has made the computer mouse a standard input device, it is now practically available in any PC. The alternatives entail the operation of the computer using a trackball, a keyboard, a touch screen or a tablet.

The movement of the mouse, run with the hand on the table or a suitable base, such as the mouse pad is received via a sensor in the mouse, digitized and transmitted via an interface to the connected computer.

The operating system uses this two-dimensional motion information in the same way as it does the pointer around on the screen. By pressing the buttons or additional elements of the mouse, the user can perform various actions in the operating system or application program.

The introduction of the computer mouse can be regarded as a major breakthrough in improving the usability of computers thanks to the Computer Repair Store.

MAC Computer Repairs Sydney

A computer case also known as a computer chassis, system unit, box, base unit or just case is the enclosure that contains the components of the computer, usually made of steel, plastic or aluminum. There is also other materials such as wood and polymethylmethacrylate that are used to design boxes. Often electroplated metal. Its function is to protect computer components.

The type of case used depends on the characteristics of the computer where you should consider the size, type of internal connectors, bays for drives and switching power.

Commodore equipped its computers from a single block in which the keyboard and magnetic stripe reader was and the Tandy TRS -80 added a TV with a separate cable. Apple was marketed in small quantities and without box.

After this initial attempt most computers line that followed included the keyboard in the housing. Commodore and Thomson opened the doors in 1982 with the Commodore VIC 20 and the famous Thomson TO7. The size of the case is given by the form factor of the motherboard. However only the form factor specifies the size of the inner box.

Barebone: Torres small whose main function is to occupy less space and creates a nice design. They are useful for people who want to make a good impression. The barebone has the problem that the expansion is complicated because it supports few (if any) devices. Another drawback is the heating. Such boxes have many USB ports to compensate for the lack of devices such as a floppy disk drive (now obsolete) to connect external devices such as a USB drive or memory.

Minitower: There are one or two 5 ¼ bays and two or three bays of 3 ½. Depending on the motherboard you can place enough cards. Desktop: Not much different from the mini tower, except that instead of being vertically placed, the desktop is horizontally positioned.

Server: They tend to be wider than the others and are typically aesthetically unpleasing because towers are intended to places where there is not much customer traffic in areas such as a data processing center. Their design is based on efficiency.

Rack: Similar to servers. Normally they are dedicated and have a power greater than any other computer. The rack servers are screwed to a piece of furniture that has a special measure. Such servers are usually placed in temperature-controlled rooms.

Modding is a type of tower involved in MAC computer repairs Sydney. Normally this type of cabinet incorporates a lot of neon lights, fans, drawings and odd colors but there are also extravagant ways that often make it difficult to expand (like a pyramid-shaped tower in which to place components complicated).

Different Types Of Computer Services In Wagga Wagga

Always use computer services in Wagga Wagga from an established company. You are assured of high quality services that help protect your device and prolong its life. Following is a list of some common services provided by these companies.

Desktop Repair – There are many things that can go wrong with a desktop computer. The problem may be with its hardware or software. You may not be facing any problem with it but planning to upgrade it. Call now for all types of computer repair and upgrade services.

Laptop Repairs – Laptops are mobile devices, making them susceptible to impacts and damages. A laptop has powerful components in small form factors. The small sizes cause stress on these components. Contact a computer service company if your laptop is not working properly or you want to upgrade any component of it.

Data Recovery – Have you lost your data due to technical or cyber attack problem? In many cases, it is possible to recover the lost data. If you have tried everything possible and failed to recover your data, it is time to contact a computer service company in Wagga Wagga. Its computer experts use a variety of techniques to recover lost data from computers and laptops.

Software Installation – Most software programs are easy to install but if you are facing any problem in installing a program, contact a computer expert from the computer service company. You can use this service to install a new program or update an old program.

Wireless Setup – Most wireless devices have easy to set up system but it gets complex if you plan to connect lots of devices. A computer expert will visit your place and help connect all wireless devices to your network.

Network Setup – Whether it is a wired or wireless network, you will need services of network technicians to install a network setup. This job can be handled only by the network specialists if networking is needed at a large place like a hotel, factory or hospital.

Cloud Solutions – Now most businesses prefer cloud computing solutions to store and manage their data. It is convenient but setting up the account is not easy. Call the computer service company to set up your cloud account. Enjoy the freedom of working from anywhere using any device with the help of cloud apps and data storage solutions.

Other types of computer services are also available. Contact for managed IT, backup, network security, business email setup, and other computer services. First determine your requirements so when you call the computer service company, it will provide you the price quote immediately.

Professional Geeks Computer Repair Services

Geeks computer repair company is here to solve your computer problems immediately. You can call Geeks for the following services.

Computer Repair

Whether you are facing hardware problem in your desktop computer or laptop, technicians of Geeks will solve your problem quickly to your satisfaction. Your computer may have stopped working partially or completely. Its hard drive, graphics card, DVD player or other components may not be functioning properly. A friendly same day repair service is available for all such computer problems.

Computer Upgrade

You may be planning to upgrade hardware or software. Geeks Computer has the right solutions. An upgraded computer lets you get more out of the system. Newer systems work faster and deliver better computing performance. If you are still running an old operating software or application, you are vulnerable to viruses and other security issues. Always use the latest versions of the OS and application programs.

Data Recovery

It is not easy to recover lost data. You may have lost written contents, images or videos. There are many techniques to recover the lost data. It is important to avoid writing and saving new data to your hard drive until you have recovered your lost data.

Virus and Spyware Removal

Are you unable to use your computer due to viruses, spyware, malware or any other security issue? Your system requires deep scan to identify the root cause of the problem. Let a professional computer technician from Geeks remove the infection from your system. Avoid using an infected computer because you will be spreading malicious programs to other computers.


Call now for any type of network system installation, repair or replacement. Both wired and wireless networking services are available. These services are provided by trained technicians who have expertise in networking. They will take into account your specific networking needs and provide the right solution.

Remote Support

Some types of computer problems can be fixed over the phone, web chat and Internet video conferencing. Smaller problems and non-hardware problems can be fixed this way. If you are facing problems installing your new printer, a simple remote support service from an expert technician will solve your problem.

Maintenance Agreements

An annual maintenance agreement is highly recommended for businesses that often need computer services. You can lower the costs of your computer repair and maintenance services with the help of such an agreement. Geeks computer repair annual service agreement is offered after taking into account your specific needs and budget. These services generally cover unexpected hardware problems, networking issues, scheduled updates and scheduled maintenance services. Call now for more details. All services are provided by trained, experienced and friendly computer technicians.