Computer Operating Systems

Urban Voice -- Instructor: Lenny Bailes

Day 34 Agenda

    1 . Discuss A+ in Depth Chapter 10 (Intro to I/O) concepts

    Serial Port Properties:

    Under the ____ interface, the port can have ___ or ___ pins. A device, such
    as a computer, that processes incoming information from the port is called the

    ____. The device that transmits information to the port, such as a _________,

    is called the ______.

    Some computers include wireless, _____ ports that operate under the RS232c
    standard. These devices don't use physical ports with actual pins; instead,
    the computer assigns them to __________ ports.     

    If two computers establish a connection through these ports or through a
    null-modem cable, the connection is said to be DTE to ____.

    The logic chip that controls the data flow through a serial port is called a ________.

    Parallel Port Properties:

    Parallel ports were originally intended for use with ___________ devices. Can you

    name two other modern uses for them? _____________, _________________.

    The names used by the operating system to recognize these ports are ____ for the first

    port and ____ for the second port.

    The standard for parallel ports that was developed in the 1990s is called ________.

    Under this standard, the three common types of parallel port are ____,  _____, and ____.

    The type that provides the fastest data throughput is ___, which requires a DMA Channel

    to function. One of the reasons that the original type is so slow is _____________________.

    Common system resource allocations for parallel ports are:        First Port         Second Port

                                                                            I/O Address

    Note that in Standard Mode, a parallel port may operate without using an IRQ.

    The interface that connects a parallel cable to a printer is called _____________.

    USB Properties

     The original   USB standard, also known as __________, or ___________ allowed for   

    two data transfer speeds   ____ megabits pre second and _____ megabits per second.

    USB Version 2, also known as ______  allows for data transfer speeds of up to ______ mbits/sec. 

    Modern motherboards usually contain one or two ________ to manage USB devices.

    peripherals (up to _____ de vices) can be added by plugging _______ into
    one of the USB    ports
    on a motherboard.

    To install a USB device, take the following steps.

    1. ____________________________________________________

    2. ____________________________________________________

    3. ____________________________________________________

    IEEE 1394 Properties:  

    IEEE 1394, also called __________      supports data transfer speeds up to ___ Gbps.

    One IEEE 1394 host controller can support ______ devices.


    3. Lab Work

    Finish serial port lab from day 33, and Meyers Lab 19.1

    Open the serial port settings in Device Manager and examine the
    port settings.  Note that the data transfer rates and parity can be
    adjusted through user software settings. The Advanced Settings
    allow you to identify the type of UART the port uses. We'll learn more about this
    when we talk about modems

    Video Card installation (See A+ in Depth, Ch. 10, p. 432 - 438)
    Device Manager and remove the listing for your Windows 98 Display Adapter
    Reboot the computer and see whether you can reinstall the driver. (It may be detected

    Go into the Display Properties through Control Panel (or right-click on the Desktop). On the
    Settings Tab, identify the color depth and Screen area used by your display. Screen area,

    also called ____________ is measured by the number of spots (or _______) in each
    horizontal line of the screen display, multiplied by the number of vertical lines. See if you
    can shift the screen resolution between 640x480 and 800x600. (You may need to download
    install a driver for the video card to do this, if the system is using the default Standard
    VGA driver.) Also see if you can shift the color depth between 256 and High-Color and
    compare the screen results by looking at a color photograph on the Internet.

    The refresh rate for your computer is the number of times per second an electronic beam
    fills the screen from top to bottom.
    Go into the Advanced Settings and determine the
    Vertical Refresh Rate for your system. (You'll probably find this on the Monitors tab.)


    Study for closed-book midterm on Thursday, which will include material through
    Andrews, Ch. 8 on hard drives.

    Work on research projects

    Read A+ in Depth Chapter 11, p. 454 to 461 on installing a sound card, which we'll do in class, tomorrow.


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