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Controller and Peripheral Basics
Peripherals are real devices, such as graphics cards or
disks controlled by controller chips on the system board or cards plugged
into it.
The IDE disks are controlled by the IDE controller chip and the
SCSI
disks by the SCSI disk controller chips and so on.
These controllers are connected to the CPU and to each other
by a variety of buses.
Most systems built now use PCI and
ISA buses to connect the main system components.
The controllers are processors like the CPU itself. They can be
viewed as intelligent helpers to the CPU.
The CPU is in overall control of the system.
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Copyright 1996-1999 by David Rusling. Licensed under GNU General Public License (Used with permission of the author). See here for details. All rights reserved.
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