ST1 Revision

ST1 Revision

1. Computer Systems

   • CPU
     • Arithmetic Logic Unit (ALU)
     • Switches on and off
     • Fetch Cycle
     • Motherboard
   • RAM
     • Fetch Cycle
   • Memory
     • Flash
       • Expensive, fast, small
     • Magnetic
       • Most common, cheap, large capacity
     • Optic
       • not really used easy to break,small storage space

2. Binary

   • Hexadecimals
     • 1 2 3 4 5 6 7 8 9 a b c d e f
     • Each hex number is converted into a nibble, which is put together as a bit.
   • 128 64 32 16 8 4 1
   • 1 = true 0 = false

3. Algorithms

   • Flowcharts

4. Representation of images

   • Colour depth
   • Colour bit
   • Resolution
   • Hz = cycles per second