Extended Industry Standard Architecture

EISA Acronym for Extended Industry Standard Architecture. A PC bus standard that extends the traditional AT-bus to 32 bits and allows more than one processor to share the bus. EISA has a 32-bit data path and, at a bus speed of 8MHz, can achieve a maximum throughput of 33 megabytes per second. 

When a PC is used in a measurement apphcation, one of the standard interfaces available with the PC is used for transfer of measurement data to the PC. Common standard interfaces in a PC are PC bus, parallel port, serial port, and USB. Internal PC bus, parallel port, and serial port have been used in many measurement apphcations. PC buses such as Industry Standard Architecture (ISA), Extended Industry Standard Architecture (EISA), NuBus, VME bus extensions for instrumentation (VXI), Versa Module Eurocard (VME), SBus, Micro Channel Architecture (MCA), and different versions of Peripheral Component Interconnect (PCI) buses were des ped for intercormection of computer subsystems and peripheral circuits within a computer. The buses are also made available for expansion of features of PCs, and connectors are provided on the motherboard. 

The IBM-PC bus was not designed as a bus, but as a means of connecting cards in the PC. The bus has been extended to 16 bits on the PC-AT and has been frequently used in industrial applications. It is a monoprocessor bus with few dedicated interrupt lines and two DMA channels available, now standardized under the name ISA (Industry Standard Architecture). The 32-bit bus extension EISA accepts ISA boards. 

CAD/CAM systems are well-organized, structured, integrated, and comprehensive tool sets for all necessary design functions. However, it is impossible to develop a CAD/CAM system that fits exactly to all possible tasks at all industrial companies even in a relatively narrow area of application. CAD/CAM systems are customized to extend their standard capabilities to meet special customer needs for their applications. Open architecture features... 

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