Basic PC Anatomy
Understanding Your Motherboard
Understanding your motherboard is about pointing out what the bits of your motherboard
actually do, if you are not used to building or upgrading your own machine you will
want to know the ins and outs of the motherboard. More ...
PC Sound Circuitry
Actual physical sound is an analog phenomenon while the computer is digital. To output
a sound stored on a computer disk to a speaker the sound circuit uses a digital-to-analog
converter. Sound input to the computer for recording uses an analog-to-digital converter.
So PC sound circuitry is primarily an AD/DA-converter or a "coder/decoder", usually
shortened to "codec". More ...
Understanding PC Data Buses
Physically, a "data bus" is the connection between the CPU and other devices on the PCs
motherboard. A data connection can be "serial" or "parallel". The data bus used in
first-generation PCs used 8-bit architecture. PCI Express uses switched serial connections. More ...
Anatomy of a Liquid Crystal Display (LCD)
Color LCD displays have a sandwich-like structure. One layer of the sandwich has
liquid crystal between two glass plates. One glass plate has a matrix of thin film
transistors on it. Liquid crystals move depending upon the charge applied to a tiny
capacitor by its related transistor. More ...
The RS-232 Serial Port
The RS-232 serial port was used to connect a mouse, modem, and/or printer.
The RS-232 serial port is now totally obsolete. I would be very surprised if you
ever run into a PC with an RS-232 serial port except possibly in a third-world
country. However, I'll briefly describe the it in this article because you may
run into a question about it in the CompTIA A+ Certification Exam. More ...
Introduction to Microprocessor Programming
Assembly language involves using instructions that are mnemonics called opcodes, along with values and/or
addresses in hexadecimal notation. To make learning as easy as possible, we'll first learn how to program a
simple microprocessor, the 6502. More ...
A+ Certification Study Guide, Sixth Edition
McGraw-Hill's A+ Certification Study Guide, with 975 pages, CD-ROM containing practice exams
and video training clips, and associated online training videos and downloadable practice exams
is the best fully integrated study system available. More ...
CRT Display Degaussing
In the CRT a deflection coil is used to steer the electron beam to a specific point on the screen.
Gradually magnetic fields build up that cause color impurity on the screen. Degaussing, named
after Carl Friedrich Gauss, is the process of removing an unwanted magnetic fields. More ...
The Small Computer System Interface (SCSI)
SCSI is complicated to configure and troubleshoot with incompatibility between devices
being a common problem. To setup a SCSI system, you need to know which SCSI standard the
devices support. The host adapter must match the devices. More ...
PC Technician Street Smarts: A Real World Guide to CompTIA A+ Skills
Hit the ground running with the street-smart training you'll find in this practical
book. Using a "year in the life" approach, it gives you an inside look at the common
responsibilities of PC Technicians, with key information organized around the actual
day-to-day tasks, scenarios, and challenges you'll face in the field. More ...
Advanced Micro Devices (AMD) Chipsets
Although most people think the microprocessor is the most important part on a computer's
motherboard, the "chipset" is equally important. With the introduction of the Athlon processor,
AMD gained the technilogical lead. AMD processors and chipsets have always held the advantage in value. More ...
CPU Cache Basics
After the processor accesses a location in memory, there's a high probability that
the next location in memory that it will access is in the same area of memory. So
to make the computer run faster, a a smaller, faster memory called a "cache" is
placed between main memory and the processor. More ...