Computer Architecture

30th Sept 2019
Computer Architecture

The CIR/current instruction register, is the current instruction the CPU is doing
Then the ALU/Arithmetic Logic Unit, is where all of the maths is done, E.G +,-,*,/
and it will also do logic, And, Or, Not (gates)

2) Identify Four events that take place during the fetch-Execute cycle

Fetch then decode then PC(Program counter) will go up by one then execute

3)Gareth's Sat Nav contains an embedded system. Define what is meant by
embedded system.

An embedded system is a computer system embedded into a device and has no keyboard
or mouse, only a button or dial if any thing.

4) Identify three devices, other than a Sat Nav, that contains an embedded system

Dishwasher, Microwave and Washing Machine

RAM -> Random Access Memory, holds Programs, Data and operating System, is volatile
       Volatile means all is forgotten when computer is shut down,Read/Write memory

ROM -> Read Only Memory, holds Bootstrap Loader,what is needed to load the computer
       Non-Volatile, memory is saved once computer is shut down.