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MOTHERBOARD. MOTHERBOARD. MOTHERBOARD. holds the processor, memory and expansion slots and connects directly or indirectly to every part of the PC. include a small block of ROM . The ROM contains the PC’s BIOS. BUS. A bus is a channel over which information flows.

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MOTHERBOARD

  • holds the processor, memory and expansion slots and connects directly or indirectly to every part of the PC.

  • include a small block of ROM.

    The ROM contains the PC’s BIOS.


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.


BUS

The universal ISA bus used now is

16 bits.

The other I/O buses (including PCI)

are 32 bits wide.

The memory and processor buses on Pentium and higher PCs are 64 bits wide.


MOTHERBOARD

  • Peripheral Component Interconnect(PCI)

    is a computer bus standard for attaching peripheral devices to a computer motherboard.


MOTHERBOARD

  • Industry Standard Architecture(ISA)

    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

  • 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 acceleration of 3D computer graphics.



Central processing unit cpu
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


Central Processing Unit (CPU)

Control Center of the Computer

The Brains of the Computer –

interprets and issues instructions


Central Processing Unit (CPU)

The Arithmetic/Logic Unit (ALU)

is a component of the CPU which performs arithmetic, comparisons, and logical operations.


What does this mean
What does this mean?

  • 32-bit Pentium processor with 128 megabytes of RAM and 40 gigabytes of hard disk space.


BINARY WORLD

Electronic circuits can exist in only one of two states: ON or OFF.

  • 0 0 (OFF OFF) = Decimal 0

  • 0 1 (OFF ON) = Decimal 1

  • 1 0 (ON OFF) = Decimal 2

  • 1 1 (ON ON) = Decimal 3


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


24 = 16

4-bit (Nibble)

28 = 256

8-bit (Byte)

16-bit Sample

216 = 65536


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


Decimal 

Binary Representation

14/2

7/2

3/2

7

3

0

1

1

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

1

1*23 =

+ 1*22 =

+ 1*21 =

+ 0*20 =

8

4

2

0

14


BINARY on your fingertips

Thanks to

http://www.dnaco.net/~ivanjs/bin1-7.html


0100100001101001001000000100100100100000011000010110110100100000010000010101001101000011010010010100100101001000011010010010000001001001001000000110000101101101001000000100000101010011010000110100100101001001

Click here to decode


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