RAM and ROM Memory

RAM Memory

The Random Access Memory is the memory where the processor receives instructions and saves the results .

Is used as a working memory for the operating system, programs, and most software . That's where all the instructions the processor running and other computational units are loaded. They are called " random access " because you can read or write to a memory location with a timeout equal to any position, they need not follow an order to access the information as quickly as possible. When starting up the computer , the POST routine verifies that the RAM modules are connected correctly. If there are no modules or may not be detected , most motherboards emit a series of beeps indicating the absence of main memory. Completed this process, the BIOS memory can perform a basic test on the RAM showing major faults in it.


ROM Memory

The Read Only Memory , also known as ROM is a storage medium used in computers and electronic devices , which allows only reading the information and not your writing, regardless of the presence or not of an energy source .

Data stored in ROM can not be modified , or at least not quickly or easily. It is mainly used to contain the firmware ( software that is closely tied to specific hardware, and unlikely to require frequent updates ) or other content vital to the functioning of the device , such as programs that implement the computer and perform diagnostics.

In its strictest sense, ROM refers only to mask - in English - MROM (the oldest type of solid state ROM) , which is made with the data stored permanently, and therefore , its content can not be modified in any way . However, the latest ROM , EEPROM and Flash comoEPROM indeed can be erased and reprogrammed repeatedly , despite being described as " read only memory " (ROM). The reason for that is the continue to call so that the reprogramming process is generally infrequent , relatively slow and often , writing is not allowed in random locations in memory. Despite the simplicity of the ROM , reprogrammable devices are more flexible and economical , so the old ROM masks are not usually found in hardware produced from 2007.

1,618... The golden ratio

It is an irrational algebraic number (non-periodic infinite decimal) that has many interesting properties, which was discovered in antiquity, not "unity" but as a relationship or ratio between line segments. This ratio is found both in geometric figures as in nature. It can be found in geometric elements in the veins of the leaves of some trees in the thickness of the branches, in the shell of a snail, in florets of sunflowers, etc.. 

Additional aesthetic character attributed to objects whose actions saved the golden ratio. Some even believe that has a mystical significance. Throughout history, it has attributed its inclusion in the design of various works of architecture and other arts, although some of these cases have been questioned by scholars of mathematics and art.