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
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 _____________.
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.
Additional 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.
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)
Open 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
and 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.