internal components Technical


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internal components Technical

  2. 2. Processors what does a CPU do : CPUs carry out the instructions it is given by users and pieces of computer programs, it carries these out by performing different forms of logic arithmetical operations which are read through in binary code which consists of 1/0s where 1s = on 0s = off, a CPU is similar to a humans brain in the way how it performs all the actions through sending signals to other parts of the computer. speed of CPUs: a CPU in 2008 would run at a minimal speed of 166Mhz but it all depends on the chip you have installed most are duo processor so for example a Intel Core 2 Duo Processor E8400 is 6M Cache, 3.00 GHz, 1333 MHz FSB.
  3. 3. memory static (cache): SRAM is a form of semiconductor memory unlike DRAM it doesnt have to refresh periodically, SRAM uses bistable latching circuitry, it is still volatile along with RAM and DRAM. EPROM: sometimes refereed to as EROM it means erasable programmable it is non volatile and it is a group of floating-gate transistors all programmed by a device that uses high voltages and is erased by a UV light being shone at it from a mercury vapour light source.
  4. 4. Adapter cards cardbus: cardbus runs the program bus mastering which allows device to communicate through the cardbus to other devices or memory without requiring permission from the CPU. bus types: there are three main types of buses control,address, and data buses, the general signals used include instruction (I),operand(O), input/output memory (I/O MEM) or input/output controller(IOC), and computer interconnection system(CIS) and there is time multiplexed bus these are the three areas in the types of buses
  5. 5. Storage devices SCSI: Small computer system interface is the standards of which control physically connecting and the transfer of data between computers. It is usually used for hard disks drive and tape drives it can be used with other components but it is mainly used with HDDs and tape drives.
  6. 6.  Solid state: solid state drives use solid state memory and use persistent data. Unlike hard disk drives and floppy disks it has no moving parts so it can be less likely to overheat instead they use microchips that are non-volatile and are less vulnerable/ prone to physical shock, and also unlike HDD’s they are without the wurring noise of spinning disks which could have been an irritation to some. SDDs are only different to HDDs in hardware in software they are rather similar so they can be integrated into a machine that previously used HDDs with minimal changes to the software that ran off the HDD’s.
  7. 7. Input devices Touch screen: similar to ordinary screens in the way that it uses electronic visual display but instead have an integrated layer that detects the touch of usually fingers and hands but can also be used by the touch of a stylus or other form of pointer object. Typical uses of touch screen are examples such as iPod touch/ iPad and a substantial amount of modern phones and examples of some of the ways you can interact with the software is single touch and multiple touch in which case some software only recognises the presence of a one object interacting whereas now it is more common to have multiple touch where it reacts to more than four objects interacting with it. An example of touch screens being used in the IT industry is when a game company makes the computer generated concept art they generally use touch screens to render and shade the images.
  8. 8.  Game controllers: includes everything from keyboards, mice, game pads, joysticks, steering wheels for car games, touchscreens and in some case tablets. They are used in the testing of games for different platforms and they are then used on specified consoles once games have been released.
  9. 9. Output devices Monitor: the screen that displays what the actual machine is running and has changed a lot since they were first released originally they started being used at data processing rather than showing images the aspect ratio has changed from 4:3 to 16:9. they started off as CRT (cathode ray tube) which was the use of electrons and a florescent screen to create an image this happens when the electrons are deflected onto the florescent screen, but now most screens are LCD (liquid crystal display) which uses the properties of liquid crystal which is its light modulating properties the image is clearer than CRT and is more energy efficient.
  10. 10.  Speakers: comes into the category of electro acoustics they transfer electrical signals into sound the most typical build of speakers is to have a paper cone around the speaker the paper cone is supporting a voice coil. The sound is spread by vibrations that come off of the speaker