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8bit MIPS Processor
8bit MIPS Processor

... A MIPS processor is one version of a reduced instruction set computer (RISC). It is a  model that is studied often in university computer architecture courses because it has enough  complexity to include all the main aspects of modern processors, but isn’t overly complex so as  to bog students down  ...
Day 8- The CPU
Day 8- The CPU

... Some newer processors have multiple cores. This means that they have many processors built on to the same chip so that they can run many instructions at once. While the individual cores might be slower than a single core processor, all the cores can work together to go faster. This means that the GH ...
Lecture 5 2008
Lecture 5 2008

1

Microcode

Microcode is a layer of hardware-level instructions that implement higher-level machine code instructions or internal state machine sequencing in many digital processing elements. Microcode is used in general central processing units, in more specialized processors such as microcontrollers, digital signal processors, channel controllers, disk controllers, network interface controllers, network processors, graphics processing units, and in other hardware.Microcode typically resides in special high-speed memory and translates machine instructions, state machine data or other input into sequences of detailed circuit-level operations. It separates the machine instructions from the underlying electronics so that instructions can be designed and altered more freely. It also facilitates the building of complex multi-step instructions, while reducing the complexity of computer circuits. Writing microcode is often called microprogramming and the microcode in a particular processor implementation is sometimes called a microprogram.More extensive microcoding allows small and simple microarchitectures to emulate more powerful architectures with wider word length, more execution units and so on, which is a relatively simple way to achieve software compatibility between different products in a processor family.Some hardware vendors, especially IBM, use the term ""microcode"" as a synonym for ""firmware"". In that way, all code within a device is termed ""microcode"" regardless of it being microcode or machine code; for example, hard disk drives are said to have their microcode updated, though they typically contain both microcode and firmware.
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