unit 3 inside the system. three tasks what are on a motherboard? label the components group 1, 5...

Unit 3 Inside the system

Three tasks

What are on a motherboard?• Label the componentsGroup 1, 5 Group 2, 9Group 3, 10Group 4, 11Group 6, 12Group 7Group 8

Get your hands dirty!• Install a DIMM memory

module (without breaking it!)

• Connect optical disc drive/floppy disk drive to the motherboard (don’t worry about power supply at the moment)

1. CPU/CPU socket2. Memory slots3. Northbridge4. Southbridge5. Power connector

6. FDD connector (short for Floppy Disk Drive)7. IDE connector (short for Integrated Drive Electronics)8. PCI or PCI Express slots9. Rear I/O panel10. Heatsink

Open the computer case

• Power supply unit• Heatsink• Cooling fan• SDRAM, DRAM, DDR,

DDR2• CPU• BIOS• DIMM memory slot• Power connector

• Graphics processing unit (GPU)

• Northbridge• Southbridge• PCI slot• PCI express slot

System-on-a-chip (SoC)

www.intel.com (2013)

rewindblog.com (2007)

www.hardwarecanucks.com, July 2009

Learning objectives

• To understand the structure and functions of the CPU

• To distinguish between RAM and ROM• To understand how memory is measured (bits,

bytes, KB, MB, GB, TB, PB)• To use relative pronouns correctly

Central processing unit

Registers

• Program counter (PC, instruction pointer or instruction address register)– a processor register that indicates where the

computer is in its instruction sequence. Depending on the details of the particular computer, the PC holds either the address of the instruction being executed, or the address of the next instruction to be executed.

• Instruction register (IR)– Holding the instruction currently being executed

How memory is measured

• ASCII– http://www.ascii-code.com/– Uses 7-digit binary numbers (128 possible characters

or symbols) to represent letters of alphabets, numbers, punctuation marks and symbols, special functions, such as the carriage return

• Can ASCII be used to encode Chinese characters?• Petabyte (PB) = “two power fifty” or “two to the

power of fifty” =1 followed by 15 zeros

Take-home assignment 2(group, Unit 4)

• Upload to ftp:\\163.25.117.117\upload\ckuo\ScientificEnglish\Assignment2

• Deadline– Friday, 17th April 2015, 5:00pm– Late submission will not be accepted!

• PowerPoint slides, max. 5– Go to http://www.pcworld.co.uk/gbuk/index.html– Find ONE laptop, desktop, or tablet that you want to buy– Copy link, photo, key features– Why choose this product in particular?