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dtparekh
Joined: 06 Nov 2004
Posts: 36
Helped: 1
Location: India
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 17 Feb 2005 11:09 What is reduced instruction set computer? |
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We are trying to make reduced instuction set 8085 microprocessor in VHDL so where we will get information about RISC and internals of 8085?
Can anybody tell the Concept in Detail ?
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arunragavan
Joined: 01 Jul 2004
Posts: 487
Helped: 21
Location: India
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| 17 Feb 2005 11:27 Re: What is reduced instruction set computer? |
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RISC processors are Reduced instruction set computers, these are micro processors which had limited no. of instructions and then n here execution of one instruction takes only one machine cycle and more over there is not much of hardware complexity.. a application specific processor falls in this section of RISC processors.
An ARM processor is an example of a typical RISC processor.
If u can get the architecture of an ARM processor and the data sheets it wud surely help u understand the concept of RISC processors
with regards,
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pixel
Joined: 16 Sep 2004
Posts: 569
Helped: 59
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| 18 Feb 2005 9:51 Re: What is reduced instruction set computer? |
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jumps or gotos can take 2 cycles
other instructions 1 cycle
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ikru26
Joined: 01 Feb 2005
Posts: 112
Location: INDIA
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| 18 Feb 2005 12:28 Re: What is reduced instruction set computer? |
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RISC
(Reduced Instruction Set Computer) A computer architecture that reduces chip complexity by using simpler instructions. RISC compilers have to generate software routines to perform complex instructions that were previously done in hardware by CISC computers. In RISC, the microcode layer and associated overhead is eliminated.
RISC keeps instruction size constant, bans the indirect addressing mode and retains only those instructions that can be overlapped and made to execute in one machine cycle or less. The RISC chip is faster than its CISC counterpart and is designed and built more economically.
***...h***p://www.answers.com/main/ntquery?method=4&dsid=2222&dekey=RISC&gwp=8&curtab=2222_1***
u can get lot of information from this site....
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samcheetah
Joined: 25 May 2004
Posts: 672
Helped: 31
Location: Pakistan
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| 18 Feb 2005 13:21 Re: What is reduced instruction set computer? |
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although it is thought that reducing the size of the instruction set is a good thing but take a look at the following article
http://www.embedded.com/story/OEG20030205S0025
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