Please enable JavaScript.
Coggle requires JavaScript to display documents.
1.1 systems architecture - Coggle Diagram
1.1 systems architecture
CPU components
ALU - arithmetic logic unit
performs calculations and logical decisions
cache
provides fast access to frequently used instructions and data
control unit
sends signals to control how data moves around the cpu
embedded systems
eg. washing machines, cars, games consoles, amazon echos
a computer system with a dedicated function within a larger mechanical system
factors affecting performance
cache size
provides fast access to frequently used instructions and data
clock speed GHz
number of instructions that can be fetched in a given amount of time
number of cores
the registers and ALUs -the things inside the cpu that enable it to do its job
purpose of the CPU
does the fetch execute cycle
von neuman architecture
PC - program counter
holds the address of the next instruction in memory
MAR - memory address register
holds the address of where data is to be fetched or stored
MDR - memory data register(memory buffer register)
holds the data fetched from or to be written to the memory
accumulator
holds the result of calculations
fetch, decode, execute
fetch - getting instructions from memory according to the PC
decode - automatic