Abstract
A computer is the heart of any contemporary data acquisition system. Today, PCs are commonplace throughout the scientific and engineering communities. The typical high-end engineering desktop computer is the workstation that runs the UNIX operating system or a version of Windows NT. Apart from the workstation there are several popular classes of computers that are useful as platforms for data acquisition systems. The IBM PC/XT computer is based on the Intel 8088 CPU. It has an external data bus 8 bits wide and an address bus 20 bits wide, for an address range of 1 Mbyte. The IBM PC/AT used Intel's 80286 CPU, which employed a true 16-bit architecture, a 16-bit external data bus, and a 24-bit address bus for a 16-Mbyte address range. One of the major components of PC is motherboard. It contains the CPU and the system's memory, timing, and control functions, as well as external interface capabilities. The chapter also discusses some PC peripheral components. Almost all PC systems use at least one floppy drive and a hard-disk drive. It is strongly recommended that a PC-based data acquisition platform have at least a 10 Gbyte or larger hard drive for storage of raw and analyzed data.
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