1.1.1 Structure & function of the processor - Filip
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what’s the purpose of the data bus ?
bus used for transferring data between the control unit and memory data register
what’s the purpose of the MDR ?
Stores the data of the instruction currently being executed
what’s the purpose of the MAR ?
To hold the address of the instruction currently being executed so that the data bus can retrieve the data
what’s the purpose of the CIR ?
holds the current instruction being executed divided into opcode and operand
what’s the purpose of the ALU ?
To solve mathematic problems presented to it
what’s the purpose of the Accumulator ?
holds the results of the ALU
what’s the purpose of Address bus ?
used to transmit the memory addresses of data between the CPU and RAM
what’s the purpose of the Control bus ?
bi-directional bus used to transmit control signals
what’s the purpose of the Program counter ?
holds he address of the next instruction to be executed
what’s the purpose of the FDE cycle ?
FDE cycle is used to process and execute instructions
describe the key term “holds he address of the next instruction to be executed”
program counter
describe the key term “bi-directional bus used to transmit control signals”
control bus
describe the key term “used to transmit the memory addresses of data between the MAR and Ram”
address bus
describe the key term “holds the results of the ALU”
accumulator
describe the key term “To solve mathematic problems presented to it”
ALU
describe the key term “holds the current instruction being executed divided into opcode and operand”
CIR
describe the key term “To hold the address of the instruction currently being executed so that the data bus can retrieve the data”
MAR
describe the key term “Stores the data of the instruction currently being executed”
MDR
describe the key term “bi-directional bus used for transferring data between the ram and the CPU”
Data bus
purpose of a register
temporary storage/memory location inside the CPU used for a single specific purpose
factors affecting cpu performance
Cache Number of cores clock speed
purpose of multi core systems
can execute multiple instructions simultaneously. More cores generally mean better performance, especially for software that can use multiple cores to execute tasks concurrently.
disadvantage of multi core systems
However, not all software can leverage multiple cores effectively, and therefore gains in performance may not be linear with increased cores.
purpose of cache
accessing cache is faster than RAM