7.2. Diagnostic Procedures for PC Components

The various tools that you can use to discover the available resources on a PC can make installing new hardware a lot easier. Unfortunately, the tools are of little use unless you understand the information they present. In this section, we discuss the various resources that may be used by PC components and how those resources are used.

Interrupt request lines, direct memory access channels, and input/output addresses are configurable aspects of the communication between the devices inside a PC. Interrupt request (IRQ) lines are used to signal that an event has taken place that requires the attention of the CPU. Input/output (I/O) addresses refer to the hardware communication lines that carry data ...

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