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speeds range from 90 to 200 MHz; you can even run more than one CPU at a time if
your OS is able to take advantage of this configuration.
What are the differences between CPUs?
The early CPUs did not have a math co-processor; they only had an 8-bit bus,
both internal and external to the CPU. In general, the Pentium has a 64-bit bus
to use. Some of the processors currently on the market have 128-bit internal
and 64-bit external busses.
What are the differences between motherboards?
Most of the motherboards are built using good standard practices. Some of the
motherboards built over seas are built with price in mind, rather than quality
first. This sometimes leads to having "traces" that are smaller than they
should be for the higher speeds that the systems run at today. Traces are like
"transmission" lines -- the smaller the trace, the more delays that are
introduced into the system.
What are IRQs?
IRQ stands for Interrupt ReQuest. These are signals that the CPU can see at
anytime during processing. Some IRQs override other IRQs (math errors). The
basic Pentium system has IRQ 0 to IRQ 15 available for its CPU.
What are I/O addresses?
Input /Output addresses communicate with devices on the system bus. These
addresses (for ISA devices) are 8-bits in length and mainly control devices such
as Serial and Parallel ports.
What is an OS?
The Operating System that most people associate with the PC is DOS (Disk
Operating System). The OS on a PC provides the programmer an interface to the
hardware on the PC system. There are many different OS packages on the market
today. Microsoft is the leader in OS software for the PC with DOS, Windows,
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