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Computer Science: - Coggle Diagram
Computer Science:
System Architecture
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FDE
PC is copied into MAR. Instructions are Fetched from memory using address in the MAR and is stored in the MDR. The PC is incremented by one. The instruction is carried out. The result is stored in the ACC. This cycle is repeated
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Memory & Storage
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ROM
Stores the BIOS (Basic Input Output System). ROM is non-volatile (still stores data when the device is off)
Virtual Memory
Part of Secondary Storage. When the RAM is full, data that isn't currently in use it put into Virtual Memory. This means it is slower that RAM and takes longer to retrieve data from there. Constant moving of data from VM and RAM can cause disk thrashing (which only happens in magnetic disks)
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Computer networks, connections & protocols
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