Computer Memory Gigabyte Megabyte

What exactly is the computer's memory and how is it used?

Memory is one of the key hardware components for the computer. Is the component which temporarily stores information (such as numbers, characters, settings, instructions, files, etc) once a team has begun. Information is temporary, because when a computer is off or reset the information is deleted from memory. When a program has done with the information that was using memory is released (not eliminated) for other programs you can use the memory.

Memory itself is a microchip (see above) that can temporarily store Bytes. The more bytes of memory has more information can be stored temporarily. A byte is a number between 0 and 255. It is the work of a program to convert each byte into something a human being and / or another program can interpret. For example. If the memory is stored 4 bytes with values 74, 79, 72 and 78 would mean nothing to you. However. For Microsoft Word 2007, the 74 byte value means J. The byte value of 79 means O. The value byte 72 is H and the 78 byte value means N. So while the memory is bytes storage values mean nothing to you, Microsoft Word 2007 has no problem of interpretation (reading) the same byte values as JUAN. The same applies to other programs that interpret (read) the byte values. For example. A paint program can interpret, 74 red, 79 as yellow, 72 years as the blue and 78 green. Whereas a language could be interpreted (read) 74, in English and Spanish 79, 72 years and 78 French and Italian. Depends on the program. Either way, the memory will always look 74, 79, 72 and 78. Aquí hay un diagrama de la memoria con los 4 bytes interpretado.

The logic behind the interpretation of byte values is as follows: If the value is 74 bytes display J (Microsoft Word 2007). If the value is 74 bytes use English (language program). If the byte value is 74 the use of red (paint program). And so on. In other words, the byte will always value of 74, but may be interpreted differently depending on the program doing the interpretation. Programs that save the configuration files of use interpretation much to reduce the number of bytes used. For example. If a paint program had to play red, yellow and blue characters that would use 13 Bytes (REDYELLOWBLUE). Whereas the use of the logic of byte values to represent RED, YELLOW and GREEN are only used 3 bytes (79, 74 and 72).

Despite of the above programs focused on the interpretation of byte values that are already stored within the memory, the opposite is equally true. For example. When writing JOHN word in a document in Microsoft Word 2007, its stores (puts) the byte values 74, 79, 72 and 78 within memory. Same with a drawing program. Instead of storing RED characters (byte values 82, 69 and 68) that can store the byte value 74 (which is RED in the example above) so that 1 byte is used instead of three, each time you use red ink.

Basically, the memory is full of numbers that are interpreted by programs in the sense of instructions, scenarios, characters, words, phrases, numbers, symbols, etc.

MEMORY

When a program is opened first, allocates some memory for their own needs. For example. If you open a test file of 1000 bytes with Microsoft Word 2007 from a floppy disk, and edit (ie change the word JUAN PABLO in) changes are not made in the test file on the disk. They are made in memory instead, to prevent wear of the disk. If you imagine every time he has published a test of character (Byte) the whole test file again had to save to disk will soon end up with a damaged disc. John Paul would just change in four re-saved. Memory is made on purpose to constant editing of byte values.

When Microsoft Word 2007 opens a test file from a floppy disk, for example, is assigned first (booking) 1000 bytes of memory in your camera, so you can store an exact copy of the test file into memory – the original test file on disk remains intact. The next step in Microsoft Word 2007 does is to allocate a memory for your editing needs. For example. If you make a copy of the word John, because you want to add (Pasted) elsewhere in the trial, behind the scenes of Microsoft Word 2007 creates a copy of the word JUAN by JUAN word storage in the editing memory. So now you have 1000 bytes filled with test characters in file memory and 4 bytes used within the memory issue JUAN characters. However. Because it is possible to copy a paragraph, a test page or even throughout the entire test Microsoft Word 2007 has to make sure you have allocated enough memory to change these situations. The same applies to the memory of file – can not allocate only 1000 bytes for the character test, but maybe 3000 bytes just in case need to add more to the test (ie, start copying the bits of a history / archive research on the test or more characters just type in the trial). So that the essay might need a total of 5,000 bytes allocated for it. Once you have finished editing the test, which is on file memory at this time then to Microsoft Word 2007 to save the memory of the camera back into the disk as a test.

A collection of bytes is known as data. Microsoft Word 2007 sees the files and memory as a single data block, which means that when you open a file and copies it to memory everything he is doing is copying a block of data from one place (ie floppy disk) to another (ie, memory). So when you save the file memory test file on a floppy disk only see it as copying a block of data from one place to another. And this is how you should see the files and memory – such as data blocks. Once the trial (memory file) saved to disk as a test show my camera and edit the memory is freed for other programs to use.

This is fine when all runs smoothly, but problems arise when a program tries to allocate memory that is not available. For example. If you open too many programs or files while may hang (freeze / Stop) Windows Vista. This is because programs either do not have enough memory to open (ie, show their own windows) or not enough memory for your additional needs such as editing. For example. If there are only 10,000 bytes of memory remaining two programs recently opened expected for 50,000 bytes of memory each one of them put in a queue. Waiting forever. Or at least until another program shuts down and releases its report, but only may be the release of 4,000 bytes of memory. In which case one expects programs could use the 4000 bytes available and then wait for the other 46,000 bytes available. On the other hand, programs may get sick of waiting and decided to close. Either way is slow and messy. That's why you must know the limits of their computer before opening too many programs at once. Another scenario is the corruption of memory. Basically this is when a program misinterprets some byte values. For example. If a language program should read 74, a configuration file, such as English, but see (read) 77 instead. Probably would display text in different languages – not much damage as you could probably change the English language setting, once back to the language program was open fully completed. However. Imagine if a program interprets a value of 100 bytes in the sense that you have paid / registered to use the program and a value of 101 bytes in the sense that they are trying to get the program for 30 days. It is possible to pay £ 30 for a program that is saying they have not paid, but you are trying just out. Incidentally. This is a way to hack software hackers legal … to change the software data (byte values) for what he thinks the user has paid for it. Apart from data bytes hacked because usually damaged files (software or programs) came from a bad / scratched disk or CD drive – files are still can read the data (byte values), but the details are correct. Unfortunately, a program does not test every byte value within a file, simply because it would be too long especially if it was a large file.

BYTE SIZE

The reason to explain the report to you is to get an idea of how data is stored and how memory is allocated. In the examples I mentioned earlier in terms of thousands bytes only (ie, 4,000 to 50,000) so I could understand Examples quite easily. However. The reality is that the programs and files have become larger and larger in recent years to the point where no longer say it is a file from a few thousand bytes long. Now, a file can be millions of bytes long. The same applies to the computer. Years ago, in memory interior could be a maximum of 32 KB (32,768 bytes), whereas these days you must have a minimum of 256 MB (262,144,000 bytes) inside. MB, GB and MB are Byte terminology (jargon) as follows:

Byte = 1 byte
Bytes = 2 bytes or more
1 Kilobyte = 1024 bytes – Kilobyte (s) is abbreviated to KB
2 kilobytes = 2048 bytes – Develop KiloBytes simply divide or multiply by 1,024 bytes
1 megabyte = 1,024,000 bytes – megabyte (s) is abbreviated to MB
2 megabytes = 2,048,000 bytes – Develop MegaBytes simply divide or multiply by 1,024 million bytes
1 Gigabyte = 1024000000 Bytes – GigaByte (s) is abbreviated to GB
2 gigabytes = 2,048,000,000 bytes – Develop GigaBytes simply divide or multiply by 1,024,000,000 bytes

READ / WRITE

When reading the data (ie from a floppy disk) is known as reading the data (since it is looking) and when data is read what is known as reading (have looked).

When data is saved it is known as the data writing (and you're writing about something, for example, a floppy disk) and when data is saved it is known as writing (since it has been written about something, for example, a floppy disk).

ROM / RAM

Memory is known for two types. ROM (Read Only Memory), which means that the hardware and software can only read the byte values stored in ROM and RAM (Read Access Memory) which means that the hardware and software can not only read the byte values stored in RAM memory, but can also temporarily change the values of bytes stored in RAM.

ROM is a chip on a motherboard (green board microchip) as a modem board, which contains the instructions (byte values) needed for the hardware (Modem) work. This is why the ROM can not have their values changed byte. The instructions (byte values) are pre-programmed into the microchip, so the first time you turn on your instructions (byte values) are always the same.

RAM memory is a microchip that is permanently installed on a card (small plate) and a graphics card or memory card, or a single removable microchip that is attached to the mainboard. The motherboard is the large main microchip green board inside the computer (base unit). RAM can have their values temporarily changed bytes and read, so you can change the graphics settings (Graphics card) or data store (memory card), for example. Although the RAM is erased when you shut down or restart the computer, and is meant as a place of temporary storage only, the data in memory is usually saved by a program (such as a file) in advance. For example. If you change the modem (hardware) with a program modem settings to save changes to your configuration file on the hard disk before the computer is shut down or restarted. When the computer restarts the modem used by default (normal pre-programmed) settings before you look, and using the settings saved configuration file. The modem uses its default setting of the first for two reasons. One of them is so you know it is configured correctly (using your normal manufacturer, is setting operational) and two in case the configuration file is corrupted, damaged or missing. If you read an incorrect configuration file (for example, because is damaged), may have problems with your modem or you can return to its default settings.

VIRTUAL MEMORY

When Windows Vista is without memory, or when there can be something really big inside memory as one piece, you start using something called virtual memory, which is hard disk space used as memory. For example. Imagine that you just write a document of the line 10 000 with Microsoft Word 2007 and then runs out of memory. Instead of Windows Vista will say "No You can write anything more – no more memory available "only allow you to continue typing normally. This is because the rest of his writing is stored on disk drive as a file that has no access. As you are concerned you just write a document and therefore does not have to worry about virtual memory. However. You should be aware that over time this wears out your hard drive. So always make sure you have plenty of memory.

MEMORY GRAPHICS

Graphics Memory is memory that stores its images (Desktop Picture in scenes of games, pictures, icons, text, and so on). This is a microchip on the graphics card. The main task of a graphics card to store images in its graphics memory and then display the images, on the monitor screen when a program requests it. For example. If you are editing a photograph of the painting are allocated package of graphics memory and camera memory (For the original picture) and some of the graphics memory as memory edit (for editing purposes) – In the same way the memory of the camera and editing memory is allocated in the above explanation of Microsoft Word 2007. The graphics card does not only show the picture (memory file) on screen the monitor, but will also update (refresh) the screen instantly monitor every time you edit the picture. In the same way Microsoft Word 2007 updates the moment any changes you make to a document. Graphics memory is also responsible for storing the images of others. For example. If you have an open game, a program free drawing and outdoor Internet is graphics memory to store pictures of the three programs. Open-end programs that use graphics more memory tasks (jobs) is giving to the graphics card. Meaning. If you give too much to do and / or you run out of graphics memory will not be able to upgrade enough quick screen monitor, which means editing and game playing for example, be instantaneous. The monitor screen is updated (drawing pictures) so slowly that it would be worth publishing a photograph or a game. A sign of this is normal when the monitor screen is updated (drawn) line by line rather than immediately. So a good graphics card with lots of memory because the integrated graphics on the computer might not be good enough for their needs.

Memory Specifications

Memory size is measured in multiples of 8 megabytes (ie, 256 MB, 512MB and 1024MB), which means I could never have 274MB or 519MB for example, and the memory speed is measured in megahertz (MHz).

Computers made before 2000 typically use memory known as SDRAM, it is now hard to find because it is no longer manufactured. SDRAM memory chip can be 100Mhz, 133Mhz or 166Mhz and is named for its speed: PC100, PC133 or PC166.

Computers from 2000 to 2005 (approximately) is usually referred to as DDR memory usage, which is still sold today. Chip DDR memory usually comes with the following specifications: PC1600 (200 MHz), PC2100 (266 MHz), PC2400 (300 MHz), PC2700 (333 MHz), PC3200 (400 MHz) or PC4000 (500 MHz).

Computers from 2005 to 2008 (approximately) normally use known as DDR 2 memory, which is currently the main type of memory sold. A DDR 2 memory chip typically comes with one of the following specifications: PC2-3200 (400 MHz), PC2-4200 (533 MHz), PC2-5300 (667 MHz) or PC2-6400 (800 Mhz).

Note. As the most recent report / best is made from time to time memory specifications above are just to give you an idea of the type specifications memory available – I have not mentioned all memory specifications only one in other words. The top flap time (ie in 2005) means that memory most recently created in the same year.

Like most computers, regardless of whether old or new, has only two memory slots inside is advisable to have at least 512 MB in each slot. Using anything less is only going to cause your computer slow. For example. The minimum memory requirement for Windows XP that used be only 256, but now that many programs like Windows Media are gone and use more memory which means minimum memory requirement of Windows XP is now 512 MB. Remember. This is minimal. You should always aim for the maximum.

The following are the minimum requirements for the year 2009.

Windows XP – 768 Megabytes (1.5 GB or more recommended)
Windows VISTA – 1.5 gigabytes (2 GB or more recommended)

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