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tell the meaning of risc and sisc microcontoller
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RISC stands for Reduced Instruction Set Computer. The design strategy of a RISC processor includes limiting the number of instructions. This does not mean that ALL RISC processors have less instructions than ALL CISC processors, but in general, they do.
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Macintosh's processor (produce by Intel) are the most common use RISC technology.
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RISC machines operates on registers to prevent in large amount of interactions with memory
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RISC can refer to many things. There are a few bussinesses with that anagram. RISC can also stand for Reduced Instruction Set Computing. It could also stand for "RNA-induced Silencing Complex."
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Sure, Linux is ported to a number of different RISC architectures, including ARM and PPC.
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HP PA-RISC systems are available from HP and authorized vendors -- contact HP
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RISC in DBMS stands for Reduced Instruction Set Computer. It refers to a type of processor architecture that focuses on the simplicity of instructions to improve performance. In database management systems, RISC processors can optimize query processing and data manipulation tasks efficiently.
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Dipto Chakravarty has written:
'Power Risc System/6000' -- subject(s): IBM RISC System/6000 computers
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In CISC, the instruction set is very large that can be used for complex operations while in RISC the instruction set is reduced, and most of these instructions are very primitive.
CISC computer's execution time is very high whereas RISC computer's execution time is very less.
In, CISC code expansion is not a problem while in RISC code expansion may create a problem.
In CISC, decoding of instructions is complex whereas, in RISC, the decoding of instructions is simple.
CISC requires external memory for calculations, but RISC requires external memory for calculations.
CISC has only a single register set while RISC has multiple register sets are present.
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CISC and RISC are the two categories that are used to classify CPU architecture. CISC is an acronym for complex instruction set computer.
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.ARM is a Processor stands for
Advanced RISC Machines
( RISC is a system stands for Reduced Instruction Set Computing ).
Also ARM stands for
Alliance for Responsible Mining a department for mining
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in cisc concept instruction set is complex but in case of risc the ins truction are reduced.
for example for mov operation many instruction are there as mov,mvi,sta,lda,lhld,shld,stax,ldax etc. but in case of risc only load and store(lda ,sta) are used for all as in case of ARM processors.
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.ARM is a Processor stands for
Advanced RISC Machines
( RISC is a system stands for Reduced Instruction Set Computing ).
Also ARM stands for
Alliance for Responsible Mining a department for mining
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There is still considerable controversy among experts about which architecture is better. Some say that RISC is cheaper and faster and therefor the architecture of the future.
Others note that by making the hardware simpler, RISC puts a greater burden on the software. Software needs to become more complex. Software developers need to write more lines for the same tasks.
Therefore they argue that RISC is not the architecture of the future, since conventional CISC chips are becoming faster and cheaper anyway.
RISC has now existed more than 10 years and hasn't been able to kick CISC out of the market. If we forget about the embedded market and mainly look at the market for PC's, workstations and servers I guess a least 75% of the processors are based on the CISC architecture. Most of them the x86 standard (Intel, AMD, etc.), but even in the mainframe territory CISC is dominant via the IBM/390 chip. Looks like CISC is here to stay …
Is RISC than really not better? The answer isn't quite that simple. RISC and CISC architectures are becoming more and more alike. Many of today's RISC chips support just as many instructions as yesterday's CISC chips. The PowerPC 601, for example, supports more instructions than the Pentium. Yet the 601 is considered a RISC chip, while the Pentium is definitely CISC. Further more today's CISC chips use many techniques formerly associated with RISC chips.
So simply said: RISC and CISC are growing to each other.
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A pure RISC processor does not, however most modern RISC processors have high speed floating point arithmetic units (and sometimes other functional units) that do take multiple clock cycles for execution. Pipelines and out of order completion mechanisms are used to hide some of the effects of this.
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RISC architectures generally have fewer instructions that operate directly on memory locations than CISC architectures. So, where a CISC machine will have instructions that operate directly on memory, in RISC this would be implemented as: Load from memory into register, do operation on register, store register back into memory. So a lot of the processing revolves around the Load-Store loop.
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Reduced Instruction Set Computing (RISC) is a CPU design concept that seeks gains in power as a trade-off for simplified instructions. This design philosophy is directly opposed to Complex Instruction Set Computing (CISC), which is the basis of the x86 style processors of the vast majority of home PCs and laptops.
Performance-OrientedThe construction of the RISC processor is such that performance is the priority, rather than raw power. When RISC and CISC were developed, the bottleneck of microprocessors was power, meaning that CISC won out and efficient, performance-oriented chips were used less and less. RISC came back into vogue when the need increased for chips that make efficient use of portable battery power.
Less VersatileSince the instruction set is so simple, that is, one instruction per cycle, RISC processors tend to be better used for simple and repetitive logic operations. CISC processors are truly "general purpose," meaning that they can pipeline multiple instructions at once without a preference for simpler or more complex applications. RISC processors need to be programmed in a very particular fashion.
SimplerThe performance orientation of the RISC architecture is due to its simple and efficient instruction set. This simplicity means that RISC processors are easier to design and inexpensive to produce, making them ideal for purpose-built and cheap computing machines that execute repetitive instructions.
Long Instruction StringsRISC processors can be adapted to run CISC style instruction strings, but they are incredibly inefficient at doing so. Since a RISC processor can only handle one instruction string at a time, code needs to be more compartmentalised and, therefore, more complicated.2 answers
- CISC: Complex Instruction Set Computer
- RISC: Reduced Instruction Set Computer
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8051 is a CISC but having less number of instruction as comared to ARM which is RISC.
CISC
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The acronym AVR has been reported to stand for Advanced Virtual RISC, but it has also been rumored to stand for the initials chip's designers: Alf and Vegard [RISC]. Atmel says that the name AVR is not an acronym and does not stand for anything in particular.
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CISC RISC Emphasis on hardware Emphasis on software Includes multi-clock
complex instructions Single-clock,
reduced instruction only Memory-to-memory:
"LOAD" and "STORE"
incorporated in instructions Register to register:
"LOAD" and "STORE"
are independent instructions Small code sizes,
high cycles per second Low cycles per second,
large code sizes Transistors used for storing
complex instructions Spends more transistors
on memory registers
Regards,
Foad Godarzy
NSWER: I believe a CISC processor is a 32 bit processor and a RISC is a 64 bit processor
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RISC
Stop cheating on the Cisco test NEVER!!!!! cheating is the easy way who whatn to do it the hard way
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The term RISC means Reduced Instruction Set Computer, as opposed to CISC, which is Complex Instruction Set Computer. The RISC processor is different from the CISC process between it has far fewer instructions, but it executes them much faster, because of its simpler internal design.
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there are two common types that is cisc & risc
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M. Fathy has written:
'a RISC-type programmable morphological image processor'
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Well, different RISC architectures can (and do) have different instruction sets, but the basics I can think of (thinking back to my computer org classes, long ago) that any would have would be add, subtract, branch, store and retrieve. Basically, anything else can be built from those.
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CISC, or Complex Instruction Set Computing, provides a rich instruction set that has instructions for many different types of operations, e.g. logic, math, floating point math, and so forth. RISC, or Reduces Instruction Set Computing, has a much sparser set of instructions that allow you to do very much less with each instruction. Because the individual instructions are simpler, a RISC chip can execute many more instructions than a CISC chip in a certain amount of time. Additionally, because it needs many fewer transistors, a RISC chip can be built to use much less power than a CISC chip, even with power saving techniques like temporarily turning off unused parts of the chip.
In modern computing, examples of CISC chips are the Intel Core and Atom series. Example RISC chips are the ARM and PowerPC chips.
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It provides more instructions than RISC (Reduced Instruction Set Computer).
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Its exactly what is says on the tin. A 32-bit processor that uses the ARM9 architecture.
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RISC - Reduced Instruction Set Computer
CISC - Comples Instruction Set Computer
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