motherboard, bus and machine cycle

1. Caleigh Crowell
Jacob Moore

2. What Is A Motherboard?
 Primary Circuit
 Connects all core components

3. Why A Motherboard Matters
 Allows components to communicate
 General-purpose and special-purpose

4. Who Has A Motherboard
 Desktop PCs
 Notebook PCs
 Cell phones
 IPods
 Servers
 Supercomputers
 Outside devices to be connected to the
system components

5. Picture of IPhone Motherboard

6. Personal Computer
Motherboard
 Sockets of microprocessor, main
memory, ROM, expansion slots
 Also includes buses

7. Different Size Motherboards
 Small ex. netbooks, tablets, or smart
phones
 Large ex. Alienware Area-51 ALX
desktop comptuer

8. What is A Bus?
 Subsystem
 Transfers data

9. Why Does A Bus Matter?
 Connects components of computer
system

10. Speed of the Bus
 Impact performance of a CPU

11. Front Side Bus
 More commonly known as the FSB
 Considered the most important bus
 Connects the CPU to the northbridge

12. Other Bus’s
 Internal Bus
 PCI Bus - Connects external devices to
the core system components through
expansion slots, or USB or PCI
connections.
 LPC Bus - Connects ROM and
sometimes other input devices to the
CPU.

13. Machine Cycles

14. Definition
 Machine Cycle - used as an orderly
method of processing software
instructions.

15. Why This Matters
 Provides organized method for the
processor to carry out instructions from
the server.
 Without the machine cycle the processor
would not be able to execute software
code.

16. Step 1
 Fetch
Instructions are fetched from primary
storage (RAM) or its cache memory.

17. Step 2
 Decode
The control unit decodes the instruction
and then sends it to the arithmetic logic

18. Step 3
 Execute
The decoded instruction is sent to the
ALU to execute.

19. Step 4
 Store
The results of the instructions are stored
back primary storage.

20. Machine Cycle Facts
 Today’s processors can overlap
machine cycles and even execute
multiple instructions simultaneously.
 Machine Cycle’s keep computers
running smoothly, and processing
orderly.