3. MOTHERBOARD

4. holds the and connects directly or indirectly to every part of the PC. holds the processor, memory and expansion slots and connects directly or indirectly to every part of the PC. include a small block of. include a small block of ROM. The ROM contains the PC’s BIOS. MOTHERBOARD

5. BUS A bus is a channel over which information flows. The wider the bus, the more information can flow over the channel, much as a wider highway can carry more cars than a narrow one. The original ISA bus on the IBM PC was 8 bits wide.

6. The universal ISA bus used now is 16 bits. BUS The memory and processor buses on Pentium and higher PCs are 64 bits wide. The other I/O buses (including PCI) are 32 bits wide.

7. Peripheral Component Interconnect (PCI) is a computer bus standard for to a computer motherboard. is a computer bus standard for attaching peripheral devices to a computer motherboard. MOTHERBOARD

8. Industry Standard Architecture (ISA) is a bus standard for IBM compatibles that extends the XT bus architecture to 16 bits. It is designed to to the motherboard. is a bus standard for IBM compatibles that extends the XT bus architecture to 16 bits. It is designed to connect peripheral cards to the motherboard. MOTHERBOARD

9. The Accelerated Graphics Port (AGP) is a high-speed computer bus standard for attaching peripheral devices to a computer motherboard, dedicated primarily to assist in the. is a high-speed computer bus standard for attaching peripheral devices to a computer motherboard, dedicated primarily to assist in the acceleration of 3D computer graphics. MOTHERBOARD

11. CPU

12. Central Processing Unit (CPU) The CPU completes a set of four basic operations: Fetches an instruction Decodes the instruction Executes the instruction Stores the results

13. Control Center of the Computer The Brains of the Computer – interprets and issues instructions Central Processing Unit (CPU)

14. The Arithmetic/Logic Unit (ALU) is a component of the CPU which performs arithmetic, comparisons, and logical operations. Central Processing Unit (CPU)

15. What does this mean? 32-bit Pentium processor with 128 megabytes of RAM and 40 gigabytes of hard disk space.

17. 0 0 (OFF OFF) = Decimal 0 0 1 (OFF ON)= Decimal 1 1 0 (ON OFF)= Decimal 2 1 1 (ON ON)= Decimal 3 Electronic circuits can exist in only one of two states: ON or OFF. BINARY WORLD

18. Binary-coded decimal Binary coded decimal (BCD) is a numeral system used in computer memory. In BCD, numbers are represented as decimal digits, and each digit is represented by four bits: Digit Bits Digit Bits 0 0000 5 0101 1 0001 6 0110 2 0010 7 0111 3 0011 8 1000 4 0100 9 1001

19. 4-bit (Nibble) 8-bit (Byte) 16-bit Sample 2 4 = 16 2 8 = 256 2 16 = 65536

20. TermAbbrevApprox. Memory Size Exact Memory Amount Approx. # of Pages of Text Kilo byte KB or K 1 thousand bytes 1024 bytes 50 Mega byte MG1 million bytes 1048576 Bytes (million) 50,000 Giga byte GB1 billion bytes 107374182 4 bytes (billion) 50,000,000 Tera byte TB1 trillion bytes 109951162 7776 bytes (trillion) 50,000,000,000

21. AMERICAN STANDARD CODE FOR INFORMATION INTERCHANGE ASCII is a seven-bit code it uses the integers representable with seven binary digits (a range of 0 to 127 decimal) to represent information. i.e. 0000000 to 1111111

22. Decimal Binary Representation 0 0 1 1 2 10 3 11 4 100 5 101 6 110 7 111 8 1000 9 1001 10 1010 11 1011 12 1100 13 1101 14 1110 15 1111 14/2 7/2 3/2 1*2 3 = + 1*2 2 = + 1*2 1 = + 0*2 0 = 7373 011011 1 84208420 14

23. http://www.dnaco.net/~ivanjs/bin1-7.html BINARY on your fingertips Thanks to

24. Click here to decode 010010000110100100100000010 0100100100000011000010110110 100100000010000010101001101 0000110100100101001001