by Dinesh Thakur Category: Memory

Memory mapping is the translation between the logical address space and the physical memory. The objectives of memory mapping are (1) to translate from logical to physical address, (2) to aid in memory protection (q.v.), and (3) to enable better management of memory resources. Mapping is important to computer performance, both locally (how long it takes to execute an instruction) and globally (how long it takes to run a set of programs). In effect, each time a program presents a logical memory address and requests that the corresponding memory word be accessed, the mapping mechanism must translate that address into an appropriate physical memory location. The simpler this translation, the lower the implementation cost and the higher the performance of the individual memory reference.



 
by Dinesh Thakur Category: Memory

In humans, the memory is mind warehouse , where are stored for a later use the various components experience. The memory of a computer somewhat similar but more limited at its possibilities.



 
by Dinesh Thakur Category: Memory

Buffer Definition: A buffer is an area of memory (RAM) reserved for temporary storage. For instance, you've probably noticed that you can quickly type a bunch of commands on the keyboard, and then just sit back and watch your computer carry out the commands one after another. This is because the computer stores the keys you pressed in a buffer-after doing one command; it goes back to the buffer to get the next one in line.



 
by Dinesh Thakur Category: Memory

A type of ROM chip that can be erased and reprogrammed. The process of programming an EPROM is often called BURNING, and the box into which it is plugged to program it an EPROM burner.

 
by Dinesh Thakur Category: Memory

A cache (pronounced "cash") is a temporary holding area in the computer's memory where the computer stores information that is used repeatedly. The computer can access the information much more quickly from the cache than if the information was stored in the usual place (which might be on a disk or in a part of the computer's memory that takes longer to access). The term cache can also be used as a verb-"to cache" means to place information in the cache.



 
by Dinesh Thakur Category: Memory

Firmware is a category or class of memory chips which contain information that is permanent (meaning it isn't erased when you shut off your computer or when the power suddenly goes out on a dark and stormy night). The best examples of firmware are theROM chips in your computer that contain programs installed at the factory. Firmware cannot be altered, per se, but in some cases the whole chip can be completely replaced by a technician when it becomes outdated or obsolete.



 
by Dinesh Thakur Category: Memory

The cycle time of a computer is the time required to change the information in a set of registers. This is also sometimes called the state transition time. The register cycle time of a processor is sometimes referred to as the internal cycle time, clock time, or simply cycle time. Main memory cycle time is usually several times the internal cycle time.



 
by Dinesh Thakur Category: Memory

By allowing ordinary people (that's me) to produce printed documents that look almost like they were professionally published, and to do it all in their own home or office, laser printers represent a true technological revolution. The first relatively affordable laser printers were the Apple LaserWriter and the Hewlett-Packard LaserJet. Prices have dropped like a rock and quality is way up since those machines came out, but the basic technology remains the same.



 
by Dinesh Thakur Category: Memory

Associative Cache: A type of CACHE designed to solve the problem of cache CONTENTION that plagues the DIRECT MAPPED CACHE. In a fully associative cache, a data block from any memory address may be stored into any CACHE LINE, and the whole address is used as the cache TAG: hence, when looking for a match, all the tags must be compared simultaneously with any requested address, which demands expensive extra hardware. However, contention is avoided completely, as no block need ever be flushed unless the whole cache is full, and then the least recently used may be chosen.

 
by Dinesh Thakur Category: Memory

DRAM stands for dynamic random access memory. DRAM is a technical term for a type of random access memory (RAM) that can retain its contents only for a very brief period (measured in milliseconds) and must therefore be continually refreshed by reading its contents at short intervals.

 

Page 4 of 8

About Dinesh Thakur

Dinesh ThakurDinesh Thakur holds an B.SC (Computer Science), MCSE, MCDBA, CCNA, CCNP, A+, SCJP certifications. Dinesh authors the hugely popular blog. Where he writes how-to guides around Computer fundamental , computer software, Computer programming, and web apps. For any type of query or something that you think is missing, please feel free to Contact us.



Search Content







Popular Article