30003030
Description
Mind Map by Hannah Heathcock, updated more than 1 year ago
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Created by Hannah Heathcock
about 3 years ago
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System
Architecture
and Memory
- CPU
- Performance
- Clock speed
- No of cycles per second
- Measured in Hertz (Hz)
- No of cycles per second
- No of cores
- Cache size
- Clock speed
- Cache
- Stores instructions
from the CPU
- 3x levels
- Level 1
- Fastest
access
- Smallest
- Fastest
access
- Level 2
- Slower
- Bigger
- Slower
- Level 3
- Slowest
- Biggest
- Slowest
- Level 1
- Stores instructions
from the CPU
- Fetch, decode, execute
- Performance
- Von Neumann
- Control Unit
- Controls flow
of data
- Decodes instructions
- Controls flow
of data
- Arithmetic Logic Unit
(ALU)
- Carries out calculations and
logical decisions within the
CPU
- Carries out calculations and
logical decisions within the
CPU
- Accumulator
(ACC)
- Stores results of
ALU calculations
- Stores results of
ALU calculations
- Logical internal
structure
- Data and programs both
stored in the same place
- Registers
- Tiny amounts of high
speed memory
within the CPU
- Each holds a specific piece
of information
- They hold the information needed
for the CPU to work
- Tiny amounts of high
speed memory
within the CPU
- Control Unit
- Memory
- Primary storage
- Data currently in use
- ROM
- Read Only Memory
- Can only read,
cannot write to
- Stores boot up
instructions
- Non volatile
- Read Only Memory
- RAM
- Random Access
Memory
- Can read and
write to
- Volatile
- Temporary data
from running
programs and files
- Virtual memory
- Special type of RAM
- On the hard drive
- Used when RAM
is full
- Special type of RAM
- Flash memory
- Special type of
non volatile RAM
- Special type of
non volatile RAM
- Random Access
Memory
- Data currently in use
- Secondary storage
- Non volatile
- Used to store files
and programs
- Magnetic
- Solid state
- Optical
- Non volatile
- Primary storage
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