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Computer Memory
The computer memory is a physical device used to store data or programs for use in a computer. Some types of computer memory include RAM (random access memory), ROM (read-only memory), and page cache.
4,434 Questions
The ________ is the essential component of the operating system that remains in RAM when your computer is powered on.
See this answer : http://wiki.answers.com/Q/What_is_the_difference_between_primary_memory_and_secondary_memory
What is the process of loading a process secondary memory into primary memory?
The computer usually uses its input/output channels to access secondary storage and transfers the desired data using intermediate area in primary storage.
What ports are available on desktop computers?
Ports are something where you can connect output devices and other devices.
Here is a list of different ports you can have:
USB ports
SD card reader port
SATA ports (located on the motherboard)
What does the cache memory do in accessing data?
Generally, there isn't. Specifically, you got a shot. Here's what I mean.
Cache - Stores minor information in your system from website's such as log-in information, what pages you visited, and what products you looked at. It also saves information pertaining your applications (software) window size and location. Cache is stored in Temp folders, although it is pointless to access this. If you are wanting to clean your Cache, I always recommend CCleaner, I've been using it for years.
"BIOS is stored on a ROM (Read Only Memory) chip, however, the data in the ROM chip can be changed. Its called flashing BIOs. It is done with software."
^You did not answer the question. He asked the "type" of ROM. EEPROM is the type of ROM that is able to be reprogrammed while physically installed in the computer.
ddr3 can achive much higher clock rates than ddr2. the highest possible clock speed of ddr2 is 1333MHz while there are already 1800MHz ddr3 sticks being produced. also ddr3 can support twice as much capacity per stick than ddr2. Answer DDR3 in several significant ways: * Higher bandwidth due to increased clock rate * Reduced power consumption due to 90mm fabrication technology * Pre-fetch buffer is doubled to 8 bits to further increase performance
What is the largest unit of imormation Kilobyte gigabyte megabyte terabyte?
1000 KB = 1 MB, 1000 MB = 1 GB, 1000 GB = 1 TB
The answer is Terabyte.
What is the function of DDR in computers?
Depending on it's context, 'DDR' can have several meanings.
Double Data Rate (refers to the transfer rate of computer memory)
Dance Dance Revolution (a video game)
Deutsche Demokratische Republik (was known in the US as East Germany)
Direct to Disk Recording
What are all the types of bytes?
A bit is one unit of data, a yes or no, an on or off.
8 bits is one byte.
1024 bytes is one kilobyte
1024 kilobytes is one megabyte
1024 megabytes is one gigabyte
1024 gigabytes is one terabyte
1024 terabytes is one petabyte
1024 petabytes is one exabyte
1024 exabytes is one zettabyte
1024 zettabytes is one yottabyte
(they have just perfected the terabyte for the computer)
I can answer this de jure or de facto.
The definition most people refer to is just how many pictures your internal storage or flash card can store. For example, 8GB of photos on my CF card.
The proper definition of memory capacity is the internal RAM of any device which handles files as they're being processed. Think of it this way.. the processor is good at adding numbers, but can't remember any. If I tell you 2+3 your brain knows how to do addition, but what if you can't even remember the numbers "2" and "3"? That's what memory is for. In a camera this is often called an image buffer because you can take a few photos and even if they aren't stored permanently they can be in "limbo" in the camera and not be lost.
What kind of material is used to make HDD platters?
Platters made from several material ferromagnetic and nonmagnetic material which are:
1 : perpendicular material cobalt and platinum and Cr
2: coated material Al2O3
Weight of platinum about 10 % to 35 %
What is the permanent memory built into your computer called?
Permanent memory is non-erasable memory, so the right answer to this question is: ROM (Read Only Memory).
RAM is an acronym for "Random Access Memory", meaning that the computer can write to the memory and later read from it. Computers read information from disk or outside sources such as the internet or peripheral devices, and writes data to the RAM. Typically the RAM is fast memory that allows the computer to read and write the data quickly, allowing applications (programs) to run at high speed. The "Random" nature of the memory means that the computer can write then read or write at any time, randomly as is necessary by the computer operating system or other applications.
Difference between two address instruction and one address instruction?
Two address instructions use registers as operand locations.
Example of a half word length (16 bit) Two address format.
Bits 0-3 OP-Code bits (4 bits 16 different Mnemonics).
Bit 4 instruction type ( e.g. 0 means half word length).
Bit 5 fixed at value 1 used as extension to op-codes.
Bits 6-9 Address A (4 bits refers to a registers hence a total of 16 registers).
Bits 10-11 addressing modes ( 2 bits hence 4 different addressing modes in this case).
Bits 12-15 Address B (4 bits refers to a registers hence a total of 16 registers).
If 16 OP-codes for One address instructions is to be: ADD, ADC, SUB, SBC, XOR, BIT, CMP, INC, DEC, LDA, STA, AND, OR, JMP, BRN, JSR.
For Two address instructions the following 6 OP-Codes are dropped: INC, DEC, STA, BRN, JMP, JSR, but new OP-Codes with the help of bit #5 is introduced instead
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now let's to introducing
One Address Instructions
This is for a 32 bit CPU word length.
Bits 0-3 OP Code bits (4 bits 16 different OP Codes).
Bit 4 word length (0/1 Two different length 16 or 32 bit in this case).
Bits 5-7 Addressing Modes (3 bits 8 different Addressing Modes).
Bits 8-31 # of Addresses (2^24 Addressing Options).
The possible OP-Codes could be: ADD, SUB, ADC, SBC, AND, XOR, ORA, BIT, CMP, LDA, STA, INC, DEC, BRN, JSR, JMP.
one addressing
24 bit Address
3 bit AM
1/0
OP Code
two addressing
0000
00
1111
1
0
0010
What is the most amount of memory you can have in a PC?
This varies wildly, and by the definition of 'personal'.
Current motherboards for standard desktops max out at 24 GB for Intel, 32 GB for AMD, and 256 GB for AMD Server boards, as of April 16th 2010.
This changes often, so don't expect it to last long as a fact. Also, I have never once seen a PC user who needed more than 6GB of RAM- I've never seen a PC utilize past the 6GB mark as of yet. However this, too, will change in time.
There's about 46 Intel boards that take 24 GB max. I cannot find any 32GB Intel boards that aren't server boards.
RAM is necessary, because without it you would not be able to run any type of application or program on your desktop such as word processors and spread sheets. You would also not be able to use the internet if there was no RAM, because what RAM does is it holds temporary data from the program or browser you are doing and RAM is what is used to allow you to keep the application open, or to keep the web browser open. so without RAM you would not be able to use the simplest and most important software on a computer.
What type of storage location is a RAM?
Random Access Memory (RAM) is a volatile memory that the computer initially uses. It is quick, but unless the data is saved to the hard drive (or some other stable device), the RAM is wiped clean once the computer is turned off - hence, the term volatile!
What are the disadvantages of random access?
Assuming you're talking about tape storage.. mainly speed ! With sequential access, the medium has to be constantly rewound back to the start before the next relevant data can be accessed. The constant rewinding slows down the access time.
What are the functions of system memory?
the main role of memory is to let OS copy in it.. means when we start PC, 1st OS gets copied on ram.. it also important for software or program..
it is measured in mb
response time is measured in nanoseconds
