| Q. | What is the maximum distance the memory unit can be from the central processing unit? | Related Search:
Physics | | | An advanced computer sends information to its various parts via infrared light pulses traveling through silicon fibers. To acquire data from memory, the central processing unit sends a light-pulse request to the memory unit. The memory unit processes the request, then sends a data pulse back to the central processing unit. The memory unit takes 0.5 ns to process a request.If the information has to be obtained from memory in 2.0 ns,
| | A. | A long time ago I worked out that the speed of light is about 1 foot per nanosecond, making problems like this very easy.
Using that, the roundtrip must be limited to under 1.5nS (since processing takes 0.5), so the answer must be under 0.75 feet or 9 inches. | | | |
| Q. | Can you give me the organizational diagram of the processor or the central processing unit? | Related Search:
Software | | | Please provide me the sketch diagram of the processor or the central processing unit(CPU). thank you so much.
| | A. | ╓───╖
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| Q. | What is the history of the processor or the central processing unit(CPU)? | Related Search:
Software | | | I really need the answer for this question. Please provide me the whole and complete history of the central processing unit or the processor. Thank you so much.
| | A. | Main article: History of general purpose CPUs
Prior to the advent of machines that resemble today's CPUs, computers such as the ENIAC had to be physically rewired in order to perform different tasks. These machines are often referred to as "fixed-program computers," since they had to be physically reconfigured in order to run a different program. Since the term "CPU" is generally defined as a software (computer program) execution device, the earliest devices that could rightly be called CPUs came with the advent of the stored-program computer.
The idea of a stored-program computer was already present during ENIAC's design, but was initially omitted so the machine could be finished sooner. On June 30, 1945, before ENIAC was even completed, mathematician John von Neumann distributed the paper entitled "First Draft of a Report on the EDVAC." It outlined the design of a stored-program computer that would eventually be completed in August 1949 (von Neumann 1945). EDVAC was designed to perform a certain number of instructions (or operations) of various types. These instructions could be combined to create useful programs for the EDVAC to run. Significantly, the programs written for EDVAC were stored in high-speed computer memory rather than specified by the physical wiring of the computer. This overcame a severe limitation of ENIAC, which was the large amount of time and effort it took to reconfigure the computer to perform a new task. With von Neumann's design, the program, or software, that EDVAC ran could be changed simply by changing the contents of the computer's memory.[1]
While von Neumann is most often credited with the design of the stored-program computer because of his design of EDVAC, others before him such as Konrad Zuse had suggested similar ideas. Additionally, the so-called Harvard architecture of the Harvard Mark I, which was completed before EDVAC, also utilized a stored-program design using punched paper tape rather than electronic memory. The key difference between the von Neumann and Harvard architectures is that the latter separates the storage and treatment of CPU instructions and data, while the former uses the same memory space for both. Most modern CPUs are primarily von Neumann in design, but elements of the Harvard architecture are commonly seen as well.
Being digital devices, all CPUs deal with discrete states and therefore require some kind of switching elements to differentiate between and change these states. Prior to commercial acceptance of the transistor, electrical relays and vacuum tubes (thermionic valves) were commonly used as switching elements. Although these had distinct speed advantages over earlier, purely mechanical designs, they were unreliable for various reasons. For example, building direct current sequential logic circuits out of relays requires additional hardware to cope with the problem of contact bounce. While vacuum tubes do not suffer from contact bounce, they must heat up before becoming fully operational and eventually stop functioning altogether.[2] Usually, when a tube failed, the CPU would have to be diagnosed to locate the failing component so it could be replaced. Therefore, early electronic (vacuum tube based) computers were generally faster but less reliable than electromechanical (relay based) computers. Tube computers like EDVAC tended to average eight hours between failures, whereas relay computers like the (slower, but earlier) Harvard Mark I failed very rarely (Weik 1961:238). In the end, tube based CPUs became dominant because the significant speed advantages afforded generally outweighed the reliability problems. Most of these early synchronous CPUs ran at low clock rates compared to modern microelectronic designs (see below for a discussion of clock rate). Clock signal frequencies ranging from 100 kHz to 4 MHz were very common at this time, limited largely by the speed of the switching devices they were built with.
[Link] 
Good luck and Happy Computing! | | | |
| Q. | What are the structure of the central processing unit(CPU) or the processor? | Related Search:
Software | | | I really need the answer for this question. Please help me, please provide me the structure of the central processing unit or the processor. Thank you so much.
| | A. | Go to...
[Link] >
They have nice diagram too for helping you understand the structure of a CPU | | | |
| Q. | will the AMD Athlon II X3 Central Processing Unit work in my laptop? | Related Search:
Laptops & Notebooks | | | i want a processor with 3.0GHz or better for my laptop so i can video edit. will the AMD Athlon II X3 Central Processing Unit work in my laptop. I have a aspire 7540-1284 now with a AMD Athlon II X2 processor right now.
| | A. | Yes any processor will do, unless its not new or up to date.. You have to have one newer that 2007 | | | |
| Q. | central processing unit which can be found in a computer. Link it with production of Global system mobile.? | Related Search:
Home Schooling | | | A advice capable of accepting data and can process that data in an accepted manner to produce result is called? central processing unit. Link your answer to a production of global system mobile. Relate it to global system products in ten lines.
| | A. | I believe they already have them and they are called Blackberries manufactured by RIMM, a Canadian company. | | | |
| Q. | How much does a CPU (central processing unit) and server weigh on average? | Related Search:
Other - Hardware | | | I must estimate the weight for an e-waste event and have no idea how much the average CPU weighs. While we're on it, how much does the average server weigh?
I would be incredibly grateful for any help on this!
| | A. | The typical 32 bit or 64 bit CPU weighs a couple of ounces. (A CPU is an integrated circuit - it plugs into a socket on the motherboard.) A small 8 bit CPU can weigh well under an ounce (like the one in your cellphone).
A server (or desktop - they're the same computer, just being used for different purposes) can weigh anywhere from a couple of pounds to many pounds, depending on the weight of the power supply, how many drives are in it, what other cards are in it, etc. | | | |
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