PS/2 Connector

PIN DIRECTION USED FOR REFERRED TO AS

1 Bidirectional Carrying key data DATA

2 Not Connected

3 Through Ground GND

4 Computer to keyboard Carrying +5 volts of
or mouse direct current VCC

5 Computer to keyboard
or mouse Clocking CLK

6 Not Connected

PS/2 Interface

Definition:
A PS/2 interface is how PS/2 devices are connected to the computer. The interface is composed of a PS/2 port on the computer, a device and a cable to connect the two together. PS/2 port are ports that are used to connect the keyboard and mouse to the computer. PS/2 ports are also referred to as a mini-DIN port. They are 6-pin round ports that are built in to the system. If ports are color coded, the keyboard port is purple and the mouse port is green.

PS/2 stands for personal system 2 which was an IBM computer.

Plug and Play

Plug and play (also written as PnP) is a standard that enables a PnP-compatible computer and a PnP-compatible operating system to work together to automatically configure setting when PnP-compatible hardware is connected to the system.

When you install hardware, this is a way high-level overview of what happens:

1. you connect a piece of hardware to a PnP-compatible system running a PnP-aware operating system.

2. All PnP cards enter configuration mode by enabling PnP code built into the card.

3. One at a time, PnP cards are isolated and a handle is assigned to the card. The handle us
used to identify that card.

4. Resources are allocated to each card that dont conflict with resources allocated to any other
card.

5. All PnP cards are activated and exit configuration mode.

Adjust Video Settings

To adjust the video setting for a monitor:

1. Use the control buttons located on the physical monitor to adjust:

• Vertical display position.

• Horizontal display position.

• Display height.

• Display widht.

2. Use the control buttons located on the physical monitor to adjust brightness and contrast.

3. Use the windows display properties dialog box to adjust user preference for screen
Resolution.

4. Use the windows display properties dialog box to adjust user preference for font size.
There are a couple of methods to do this.The first is usually sufficient for most needs.

Install a Monitor

To install a monitor:

• Turn off the computer.

• Locate the monitor port on the computer

• 15-pin VGA adaptar.

• Align the pins on the monitor cable with the holes in the adapter port and plug in the monitor.

• Secure the monitor to the port by tightening the screws on each side of the port.

• Plug in the monitor power cord.

• Turn on the computer.

• Turn on the monitor.

• Verify that the monitor works,
  

*Check the power light is on, that is green,that it is not blinking.

*Make sure the colors display correctly .

*Make sure there are no lines in the image displayed on the monitor.

*There should be no waviness to the display.

Display Characteristics

Characteristic Description

Dot pitch: The distance between the same color dots on the screen.The
Closer the dots are together, the smoother the image will be and
The finer the detail that can be shown.

Resolution: The maximum number of pixel on a monitor.

Refresh rate: The number of times per second that the entire monitor is
Scanned.

Color depth: The number of bits used to store the color of a pixel
Determines how many colors can be displayed.

Font: Changing to another font requires that the fonts be installed
On the system and the system to be restarted before they
Can be used.


Setting Description

Brightness If the brightness is set too high, you might get an "auro"
Effect displayed on the screen. if it is set too low, you might
Not see anything on the screen.

Contrast If the contrast is not set correctly for the monitor and the
Lighting conditions in the room you might not be able to see
Anything on the screen.

Image position This is the location of the display in relation to the physical
Monitor sometimes the image is not centered on the monitor.

Distortions If lines dont appear straight on the monitor, you might need
To adjust settings.

PORTS

Definition:

A port is a hardware connection interface on a computer system that enables devices to be connected to the system. All ports:

• Connect a device that uses a cable that matches the configuration of the port.

• Carry the signals from a device to the computer system.

• Carry the signals from the computer system to a device.

Ports Vary by :

• The number of pins or connections it contains.

• The layout of the pins.

• The signals they carry.

• The devices that can be connected to the port.

• The location.Some connect internal devices and other connect external devices.

Example:
A monitor port is a 15-pin female connector. The monitor cable ends in a matching
15-pin mule connector which plugs into the port on the system.

Gender:
Cables and port have genders. For example, if the port has plugs . the matching cable
will have sockets.The port in this case would be considered female and the cable would
be considered male.

Video Output Devices

Definition:-
A Video output device is a computer peripheral that users to view information
On a computer system. Similarities between video output devices include:

• All video output devices display an image of some type.
• They all have controls to change the settings for the device.
• They connect to the computer system using a cable.

Differences between video output devices include:

• The size and shape of the display.Monitors are measured diagonally across the glass screen.

• The location and type of controls. Controls could be separate buttons for each function.

• Some have a curved screen and others have a flat screen.

• some use analog signals and some use digital signals. Analog signals are carried on 15-pin VGA cables to the video port on the computer.

• Some use Cathode Ray Tube(CRT) technology and others use Liquid Crystal Display(LCD) technology

• The way they produce the image varies:

1. CTRs use a Phosphorous coating inside a glass screen
2. LCD monitors use different colored sandwiched between two sheets of plastic.

Peripheral Device

Define Peripherals as any device connected externally to the system case.

Example:- Monitor,Keyboard,Printer, Scanner, and any other device you can connect to one of the system connectors.