Computer+Memory

COMPUTER MEMORY GETTING STARTED COMPUTER MEMORY EXPLAINED: CLICK THE LINK BELOW COMPLEX TUTORIAL: []

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R AM RAM RAM RAM is an acronym for random access memory, a type of computer memory that can be accessed randomly; that is, any byte of memory can be accessed without touching the preceding bytes. RAM is the most common type of memory found in computers and other devices, such as printers.

Types of RAM There are two different types of RAM: The two types of RAM reffered in the technology they use to hold data, with DRAM being the more common type. In terms of speed, SRAM is faster. DRAM needs to be refreshed thousands of times per second while SRAM does not need to be refreshed, which is what makes it faster than DRAM. DRAM supports access times of about 60 nanoseconds, SRAM can give access times as low as 10 nanoseconds. Despite SRAM being faster, it's not as commonly used as DRAM because it's so much more expensive. Both types of RAM are volatile, meaning that they lose their contents when the power is turned off. ROM ROM ROM ROM, acronym for read-only memory, Computer memory on which data has been prerecorded. Once data has been written onto a ROM chip, it cannot be removed and can only be read. Unlike main memory (RAM), ROM retains its contents even when the computer is turned off. ROM is referred to as being nonvolatile, whereas RAM is volatile. Most personal computers contain a small amount of ROM that stores critical programs such as the program that boots the computer. In addition, ROMs are used extensively in calculators and pheral devices such as laser printers, whose fonts are often stored in ROMs. A variation of a ROM is a prom (programmable read-only memory). PROMs are manufactured as blank chips on which data can be written with a specialdevice called a PROM programmer
 * DRAM-dinamic random access memory
 * SRAM-status radic access memory

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