Basic PC Anatomy
How Does the CPU Cache Work?
CPU's however use a 2 level cache system. The principles are the same. The level 1
cache is the fastest and smallest memory, level 2 cache is larger and slightly slower
but still smaller and faster than the main memory. More ...
IEEE 1284 Parallel Port
The parallel port was primarily used to connect a printer to a PC. Today,
the parallel port is obsolete, being replaced by the USB port. Although now obsolete,
millions of parallel port printers were manufactured and no doubt many of them are still
in use today. 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 ...
AMD Sempron Processor
The Sempron replaced the Duron as AMD's budget processor. The socket A Sempron is
basically an Athlon XP with half the cache. The socket 754 Sempron is a cut down
version of the Athlon 64 processor with half the cache. More ...
The AMD Athlon 64 X2 Processor
The Athlon 64 X2 is the first dual-core CPU manufactured by AMD.
It is essentially two Athlon 64 cores on one die joined together with additional control
logic. The cores share one dual-channel memory controller. The benefit of dual-core
processors is their ability to process more software threads at the same time. However,
many programs are written with only one thread. 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 ...
1G, 2G, 3G, and 4G Cellular Wireless Standards
The meaning of the terms 3G and 4G have been made very confusing because some wireless carriers
have built new high-speed 4G networks from the ground up while other wireless carriers have chosen
to doctor-up their 3G service and market it as 4G. More ...
FREE Ebook - Basic PC Anatomy
This ebook explains the main components and functions of a computer in an efficient and concise
manor without wasting your time. When you finish reading it, you'll understand basic PC anatomy. More ...
Why Does My Hard Drive Show Less Space Than the Specification?
Your hard drive may show less space than the published specifications due to a number
of reasons. 1. The way size is calculated and displayed. Some computers have a non-DOS
hard drive partition that is used for features such as Hibernation, or Recovery... More ...
The video circuits of a computer take digital data and arrange it for display on a screen.
In the past, PCs used CRTs (Cathode Ray Tubes) for video display. Today's PCs use LCDs
(Liguid Crystal Displays). Whether the display is CRT or LCD, the image is created with
a matrix of dots (called pixels for picture elements). More ...
All About Your Computer's BIOS
Are you confused by the computer BIOS? The BIOS is a fundamental component of any PC
and if you really want to get into the guys of a computer, it?s good through understanding
what BIOS Is all about. More ...
MPEG4, H.264, MJPEG Compression for DVR Recording - What's the Difference?
The main objective of Video compression is to have the smallest file size possible
while still preserving good video and audio quality. MPEG4, H.264, and MJPEG are
three DVR CODECs that aim to compress the videos for transferring purposes. Each
of these formats have their own strengths and weaknesses. More ...
Basic CPU Architecture - Interrupt Request Lines (IRQ)s
What happens when the CPU (Central Processor Unit) is busy doing something, like
defragmenting the hard disk, and you press a key on the keyboard? An interrupt (IRQ)
is a connection between a hardware device and the CPU. A hardware device uses it's
assigned IRQ line to signal or "interrupt" the CPU when it needs attention. More ...