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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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What is the importance of a cisc processor?
importance of cisc processores
Why are RISC architectures referred to as Load-Store architectures?
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.
How does a R.I.S.C processor differ?
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.
Can you give me three examples of RISCreduce instruction set computer?
good example for RISC processors is DSP (Digital signal processing) processors. simillarly for cisc processors is microprocessor.we can understand the difference between these two by a simple example. here it is, Convolution in terms of DSP is nothing but continuous multiplication. cisc processor performs multiplication by continious addition.but risc processor perform continious multiplication in a single pipeline architecture.
What is diffeence between a microprocessor and microprogramed?
Do you mean what is the difference between a microprocessor and microcode? Microcode is an instruction sequencer found in CISC architectures. It's job is to take the machine code and break it down into a sequence (usually steps of 4) to execute things such as indirect register references and other multi-step instructions.
WHAT part of the processor is responsible for directing actions performed by the processor?
When an instruction reaches a microprocessor it arrives at an internal block known as a "microcode sequencer" which is present in CISC architectures. This microcode sequencer then steps through a series of locations in the microcode ROM and issues control signals to the various registers, multiplexers, ALU, etc in the microprocessor. RISC architectures lack this microcode sequencer, but have a similar construct known as a microcode translator or interpreter. Because RISC machines must complete execution in a single clock cycle, there aren't any "steps" to cycle through. Remember that RISC instructions are inherently more simple than CISC instructions.
How do you determine if your processor is RISC or CISC?
RISC (reduced instruction set computer) and CISC (complex instruction set computer) are two major types of processor architecture. These styles differ in the way that they handle incoming instructions, making it difficult to compare the clock speeds of the two types, as a 2.0ghz RISC processor will be faster or slower than a 2.0ghz CISC processor depending on the structure of individual applications. Knowing which type of processor you have is accomplished by knowing which company made your processor.Related Searches:Gaming ProcessorCredit Card ProcessorDifficulty:EasyInstructions1 Open the "Start" menu.2 Press "Run."3 Type in "msinfo32" and press "Enter."4 Click "System Summary" and read the "Processor" tab. If your processor is made by Intel you have a RISC processor. If it was made by AMD you have a CISC processor.
What is a CISC processor?
"CISC" stands for Complex Instruction Set Computer, CISC processor can execute complex instructions in one or more clock cycles. It is meant to differentiate it from a RISC or Reduced Instruction Set Computer, which can only perform one simple instruction in (usually) one clock cycle. A CISC is meant to have many machine level commands carried out as part of a single assembly command. The assembly command is broken into a series of "micro-code" commands which are executed internal to the processor by a "micro-code sequencer".
Why CISC chips are relatively slow per instruction?
Short answer: CISC instructions consist of several RISC instructions. That makes CISC slower (per instruction) compared to RISC.Compared to other architectures, CISC processors have relatively powerful instructions, which used run so called microprograms. For each instruction, the corresponding microprogram has to be fetched and executed, which is considerably slower than just using 'real' hardware instructions (compare RISC). According to wikipedia, microprogrammed processors are no longer common. Instead, a special unit resolves CISC instructions to RISC instructions.
Please can someone give me the answera) Identify any FOUR 4 drawbacks of a CISC processor compared to a RISC processor?
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.
Why arm7 processor is not a perfect risc processor?
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.
Which characteristics of RISC systems could be directly implemented in CISC systems?
Certain characteristics of RISC (Reduced Instruction Set Computer) systems can be implemented in CISC (Complex Instruction Set Computer) systems, such as a load/store architecture that separates memory access and arithmetic operations. Additionally, the use of a larger number of registers to minimize memory access can enhance performance in CISC systems. Furthermore, CISC architectures can adopt pipelining techniques, allowing for overlapping instruction execution to improve throughput. Lastly, simplifying instruction decoding can also be integrated to streamline the execution process in CISC designs.
