Intelligent Input/Output (I2O) is a defunct computer input/output (I/O) specification. I2O emerged from
Intel in the mid 90's with the publication of the I2O specification in 1996 by the Intelligent I/O
Special Interest Group. I2O was originally designed to make use of the
i960 microprocessor as the I/O offload engine. I2O was plagued by several problems: the i960 was largely a failure and I2O made systems more expensive in a low cost marketplace. Additionally, the I2O SIG was seen as open-source hostile and small-player insensitive because it charged high fees for participation and was dominated by a few corporate players, notably Microsoft. While it remains unclear which of these factors caused the ultimate failure of I2O, only a few server class machines were ever built with onboard I2O. The I2O-SIG disbanded in October of 2000, with a small amount of architectural information being made available via FTP at about the same time.
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INTELLIGENT INPUT/OUTPUT. I2O
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