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19376602
Systems Architecture
Description
Mind Map on Systems Architecture, created by Emma Worman on 17/09/2019.
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Mind Map by
Emma Worman
, updated more than 1 year ago
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Created by
Emma Worman
almost 5 years ago
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Resource summary
Systems Architecture
Von Nuemann
Uses a single processor
Uses 1 memory for both instructions and data
Executes programs following the fetch, decode, execute cycle
Based off the stored- program computer concept, where instructions data and program data are stored in the same memory
This concept is still used today
Control Unit (CU)
It lets the computers logic unit, memory, as well as both input and output devices Know how to respond to instructions.
Coordinates the CPU
Arithmetic Logic Unit (ALU)
Works out all the calculations
Modern CPUs contain very powerful ALUs
Registers
Current Instruction Register (CIR)
Holds the instruction the has just been fetched
Memory Address Register (MAR)
Holds the address of data that needs to be accessed
Memory Data Register (MDR)
Holds the data for the next instruction to be decoded
Accumalater (ACC)
Holds all the ALU data
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