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 Introduction
VMEbus modules are state of the art products and are used to construct very powerful and rugged computer systems. The VMEbus is an industrial open standard system. VMEbus boards have data bus sizes of 16, 32 or 64 bits and are designed to be plugged into a backplane that has up to 21 slots for other boards. These other boards can be CPU boards or peripheral boards providing various functions. The VMEbus standard originated with the Motorola VERSAbus in 1979 which was designed using the then new MC68000 microprocessor. The VMEbus signals are patterned after the M68000 bus signals and timing. VMEbus boards now contain processors such as DEC Alpha, MIPS, i960, various DSP chips, AM29000 (RISC chip), PowerPC and 80486 in addition to the Motorola 680x0 line. Many peripheral boards exist including VGA, telecommunication, analyzers, data acquisition, video processors and memory (1 gigabyte!). The VMEbus originated in 1981. |
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