Sandiah Notes

RISC (Reduced Instruction Set Computing)
a. history of RISC
Reduced Instruction Set Computing (RISC) ​​or "a simplified instruction set computing" was first conceived by John Cocke, researchers from IBM in Yorktown, New York in 1974 when he proved that about 20% of instructions in a processor was handling about 80% of overall it works. The first computers using RISC concept was IBM PC / XT in the era of the 1980s. The term RISC was first popularized by David Patterson, who teaches at the University of California at Berkely.
b. Characteristics of RISC Architecture
One instruction persiklus
Register to register operations
Simple addressing modes
Simple instruction format
Hardwired design (no microcode)
Instruction format fix
The compilation is a quick
c. The characteristics of RISC
Instructions sized single common size is 4 bytes. The number of data bit addressing mode, typically less than five
the fruit. There is no indirect addressing. There is no operation that combines the operation of load / store with arithmetic operations (for example, the addition of memory, adding to memory).

 Key Features:
General Purpose Register in the amount of the vast
Using compiler technology to optimize the use of registers
Instuction Set a few and simple
The general approach in the instruction pipeline
Leading to:
Set the execution of large and more addressing modes