3367105
Description
Mind Map by ANDRES DONOSO DIAZ, updated more than 1 year ago
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Created by ANDRES DONOSO DIAZ
almost 9 years ago
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CPU
- Central Processing Unit
- chip that does all of the calculations
- three mayor parts
- Control Unit (CU)
- acts as
- organizing force
- organizing force
- does not execute instructions
- controls sequence of execution
- controls what is stored in the cache
- takes care of fetching and decoding
- works with special registers
- Instruction Register (IR)
- holds instruction currently being executed
- holds instruction currently being executed
- Program Counter (PC)
- contains address of the next instruction to be executed
- contains address of the next instruction to be executed
- Memory Data Register (MDR)
- contains the data to be stored in the computer storage, or the data after a fetch from the computer
storage
- Connected to data bus
- data can go both ways
- to and from memory
- to and from memory
- can load its data from
- Data bus
- reading data
- reading data
- CPU registers
- storing data
- storing data
- Data bus
- contains the data to be stored in the computer storage, or the data after a fetch from the computer
storage
- Memory Address Register (MAR)
- stores memory address from which data will be fetched, sent or stored
- holds memory location of data that needs to be accessed
- enable communication between the memory and processing unit
- stores memory address from which data will be fetched, sent or stored
- Instruction Register (IR)
- uses buses to transfer information to the ALU and the CPU
- acts as
- Arithmetic and Logic Unit (ALU)
- performs
- arithmetic operations
- adding
- dividing
- substracting
- multiplying
- adding
- logical operations
- AND
- OR
- NOT
- AND
- arithmetic operations
- performs
- Primary memory
- cache
- frequently used instructions are stored here
- frequently used instructions are stored here
- connects with ALU and CU
- cache
- Control Unit (CU)
- chip that does all of the calculations
- uses buses to transfer information
- address
- addresses of locations in the primary memory are transferred
- transferred with data bus
- addresses of locations in the primary memory are transferred
- data
- contains
- information
- instructions
- information
- contains
- connected to each other by a collection of wires
- address
- MACHINE CYCLE
- 1) Fetch
- involves retrieving an instruction from memory
- involves retrieving an instruction from memory
- 2) Decode
- instructions is broken up into parts
- CU
- CU
- instructions is broken up into parts
- 3) execute
- execute is performed
- execute is performed
- 4) writeback
- outputs the result to some form of memory
- ALU
- ALU
- outputs the result to some form of memory
- 1) Fetch
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