advertisement

Random Access

67 %
33 %
advertisement
Information about Random Access
Education

Published on November 3, 2008

Author: JOJO1990

Source: authorstream.com

advertisement

Random Access : Random Access In this type of accessing method, the memory location can be reached by just specifying the address. An example of device that uses this type of Random Access method is RAM and ROM. Memory capacity : Memory capacity The smallest storage unit inside the computer is the bit. The bit contains either 0 or 1 Inside computer, each character is represented by 8 bits (one Byte) The compute manufactures agree that each character has a specific sequence of bits. Example : (A) is represented by 01000001(1 byte). Slide 3: Example: of representing A, B, and C in memory: Slide 4: The capacity for memories can be measured by some units such as: Memory types : Memory types There are two main types of memory: Primary Storage Secondary Storage Primary Storage : Primary Storage Primary storages are units which used to store data and information temporary. It is a volatile memory. Primary storage devices are more expensive than secondary storage devices. Primary storage devices use random access method. types of primary storage devices : types of primary storage devices There are many types of primary storage devices, the most famous types are: Random Access Memory (RAM) Read-only memory (ROM) Cache Memory Programmable ROM (PROM) 1. Random Access Memory (RAM) : 1. Random Access Memory (RAM) It is a volatile memory, which means that the data will be lost when the power turn off. This type of memory used to save data temporarily (for short period of time). Computer processing speed depends on the size of RAM, more RAM means more processing speed. User has no direct access to this memory. 2. Read-only memory (ROM) : 2. Read-only memory (ROM) It is nonvolatile memory, which means that the data will not be lost when the power turn off. It contains data that guide the computer when starting up and other instructions. ROM is read only memory which means that the CPU has no ability to make any change of this memory. User has no access to this memory. ROM capacity depends on ROM manufactures and the requirements. Cache Memory : Cache Memory It is a type of memory which is used to store instructions that are used most often in the CPU. Cache memory is located between CPU and RAM. Cache memory is faster than RAM because the instructions travel shorter distance to the CPU. The advantage of cache memory is increasing the computer processing speed. The disadvantages of cache are that it is expensive and has small size. 4. Programmable ROM (PROM) : 4. Programmable ROM (PROM) It is a type of ROM that can be programmed. It comes without instructions and the user program it according to his requirements. Once PROM programmed, it is not possible to make any changes or reprogram it. There are other types of ROM memories such as EPROM (can be erased and programmed again) Secondary Storage : Secondary Storage Secondary storages are units which used to store data, information, systems software, and applications software permanently (nonvolatile). It can store huge amount of data. It is cheaper than primary storage. types of storage devices : types of storage devices There are many types of storage devices, the most famous types are: Floppy Disks Hard Disks Compact Disk (CD) Digital Video Disk (DVD)

Add a comment

Related presentations

Related pages

Random-Access Memory – Wikipedia

Random-Access Memory (der oder das; englisch random[-]access memory, zu Deutsch: „Speicher mit wahlfreiem/direktem Zugriff“ = Direktzugriffsspeicher ...
Read more

Daft Punk | Random Access Memories

Daft Punk's new album, Random Access Memories featuring "Get Lucky," is now available. Order now on iTunes: http://smarturl.it/RAMiTunes
Read more

Random access - Wikipedia, the free encyclopedia

In computer science, random access (more precisely and more generally called direct access) is the ability to access an item of data at any given ...
Read more

random access | a south florida web design group

random access | a south florida web development group proficient in web design, custom programming, ecommerce, ajax, css, databases and all things web
Read more

Random Access Memories - Daft Punk: Amazon.de: Musik

Amazon.de/musik: Daft Punk – Random Access Memories jetzt kaufen. Bewertung 4.2, DAFT PUNK, RANDOM ACCESS. Disco, Pop, Pop international, Dance
Read more

dict.cc | random access | Wörterbuch Englisch-Deutsch

Übersetzung für random access im Englisch-Deutsch-Wörterbuch dict.cc.
Read more

Random Access Memories – Wikipedia

Random Access Memories; Studioalbum von Daft Punk; Veröffentlichung: 17. Mai 2013: Aufnahme: 2008–2012: Label: Daft Life, Columbia Records: Format: CD ...
Read more

Random Access, Vol. 4 - Microsoft Store

Genres Electronic / Dance , Dance Label DigDis Gesamtdauer 2:36:59 Musiktitel 29 Format MP3 MP3-Download Beim Kauf von Alben oder ...
Read more

„Random Access Memories“ von Daft Punk in iTunes

Probieren, kaufen und laden Sie Titel vom Album „Random Access Memories“, unter anderem „Random Access Memories - iTunes LP“, „Give Life Back to ...
Read more

What is random access? Webopedia Definition

random access )Refers to the ability to access data at random.
Read more